Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolution structural and chemical imaging of biomolecules with ATOMIC FORCE MICROSCOPY.
Nanometer-sized tubes composed of various substances including carbon (CARBON NANOTUBES), boron nitride, or nickel vanadate.
NANOTUBES formed from cyclic peptides (PEPTIDES, CYCLIC). Alternating D and L linkages create planar rings that self assemble by stacking into nanotubes. They can form pores through CELL MEMBRANE causing damage to cells.
The development and use of techniques to study physical phenomena and construct structures in the nanoscale size range or smaller.
An allotropic form of carbon that is used in pencils, as a lubricant, and in matches and explosives. It is obtained by mining and its dust can cause lung irritation.
A polyhedral CARBON structure composed of around 60-80 carbon atoms in pentagon and hexagon configuration. They are named after Buckminster Fuller because of structural resemblance to geodesic domes. Fullerenes can be made in high temperature such as arc discharge in an inert atmosphere.
Nanometer-scale composite structures composed of organic molecules intimately incorporated with inorganic molecules. (Glossary of Biotechnology and Nanobiotechology Terms, 4th ed)
Materials which have structured components with at least one dimension in the range of 1 to 100 nanometers. These include NANOCOMPOSITES; NANOPARTICLES; NANOTUBES; and NANOWIRES.
A dark powdery deposit of unburned fuel residues, composed mainly of amorphous CARBON and some HYDROCARBONS, that accumulates in chimneys, automobile mufflers and other surfaces exposed to smoke. It is the product of incomplete combustion of carbon-rich organic fuels in low oxygen conditions. It is sometimes called lampblack or carbon black and is used in INK, in rubber tires, and to prepare CARBON NANOTUBES.
Any of a variety of procedures which use biomolecular probes to measure the presence or concentration of biological molecules, biological structures, microorganisms, etc., by translating a biochemical interaction at the probe surface into a quantifiable physical signal.
Electron microscopy in which the ELECTRONS or their reaction products that pass down through the specimen are imaged below the plane of the specimen.
Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light.
Technique whereby the weight of a sample can be followed over a period of time while its temperature is being changed (usually increased at a constant rate).
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
The branch of medicine concerned with the application of NANOTECHNOLOGY to the prevention and treatment of disease. It involves the monitoring, repair, construction, and control of human biological systems at the molecular level, using engineered nanodevices and NANOSTRUCTURES. (From Freitas Jr., Nanomedicine, vol 1, 1999).
Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
Relating to the size of solids.
Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.
Determination of the quantity of a material present in a mixture by measurement of its effect on the electrical conductivity of the mixture. (Webster, 3d ed)
The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily.
A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.
The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.
Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.
Characteristics or attributes of the outer boundaries of objects, including molecules.
The utilization of an electrical current to measure, analyze, or alter chemicals or chemical reactions in solution, cells, or tissues.
A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
Nanometer-scale wires made of materials that conduct electricity. They can be coated with molecules such as antibodies that will bind to proteins and other substances.
Specialized structures of the cell that extend the cell membrane and project out from the cell surface.
Enzymes which are immobilized on or in a variety of water-soluble or water-insoluble matrices with little or no loss of their catalytic activity. Since they can be reused continuously, immobilized enzymes have found wide application in the industrial, medical and research fields.
The properties and processes of materials that affect their behavior under force.
That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants.
Histiocytic, inflammatory response to a foreign body. It consists of modified macrophages with multinucleated giant cells, in this case foreign-body giant cells (GIANT CELLS, FOREIGN-BODY), usually surrounded by lymphocytes.
Structures which are part of the CELL MEMBRANE or have cell membrane as a major part of their structure.
Alkaloids extracted from various species of Cinchona.
Synthetic or natural materials, other than DRUGS, that are used to replace or repair any body TISSUES or bodily function.
Electrical devices that are composed of semiconductor material, with at least three connections to an external electronic circuit. They are used to amplify electrical signals, detect signals, or as switches.
Substances used in biomedicine or dentistry predominantly for their physical, as opposed to chemical, properties.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained.
A type of scanning probe microscopy in which a probe systematically rides across the surface of a sample being scanned in a raster pattern. The vertical position is recorded as a spring attached to the probe rises and falls in response to peaks and valleys on the surface. These deflections produce a topographic map of the sample.
The study of ENVIRONMENTAL POLLUTION and the toxic effects of ENVIRONMENTAL POLLUTANTS on the ECOSYSTEM. The term was coined by Truhaut in 1969.
The exposure to potentially harmful chemical, physical, or biological agents by inhaling them.
Nanometer sized fragments of semiconductor crystalline material which emit PHOTONS. The wavelength is based on the quantum confinement size of the dot. They can be embedded in MICROBEADS for high throughput ANALYTICAL CHEMISTRY TECHNIQUES.
An isoform of DNA that occurs in an environment rich in SODIUM and POTASSIUM ions. It is a right-handed helix with 11 base pairs per turn, a pitch of 0.256 nm per base pair and a helical diameter of 2.3 nm.
Tree-like, highly branched, polymeric compounds. They grow three-dimensionally by the addition of shells of branched molecules to a central core. The overall globular shape and presence of cavities gives potential as drug carriers and CONTRAST AGENTS.
Agents that modify interfacial tension of water; usually substances that have one lipophilic and one hydrophilic group in the molecule; includes soaps, detergents, emulsifiers, dispersing and wetting agents, and several groups of antiseptics.
Systems for the delivery of drugs to target sites of pharmacological actions. Technologies employed include those concerning drug preparation, route of administration, site targeting, metabolism, and toxicity.
Hydrocarbons with more than one triple bond; or an oxidized form of POLYENES. They can react with SULFUR to form THIOPHENES.
Products or parts of products used to detect, manipulate, or analyze light, such as LENSES, refractors, mirrors, filters, prisms, and OPTICAL FIBERS.
A technique of measuring the dielectric properties of materials, which vary over a range of frequencies depending on the physical properties of the material. The technique involves measuring, over a range of frequencies, ELECTRICAL IMPEDANCE and phase shift of an electric field as it passes through the material.
Organic compounds that contain silicon as an integral part of the molecule.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
Submicron-sized fibers with diameters typically between 50 and 500 nanometers. The very small dimension of these fibers can generate a high surface area to volume ratio, which makes them potential candidates for various biomedical and other applications.
The heat flow across a surface per unit area per unit time, divided by the negative of the rate of change of temperature with distance in a direction perpendicular to the surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Selective cell targeting with light-absorbing microparticles and nanoparticles. (1/401)

We describe a new method for selective cell targeting based on the use of light-absorbing microparticles and nanoparticles that are heated by short laser pulses to create highly localized cell damage. The method is closely related to chromophore-assisted laser inactivation and photodynamic therapy, but is driven solely by light absorption, without the need for photochemical intermediates (particularly singlet oxygen). The mechanism of light-particle interaction was investigated by nanosecond time-resolved microscopy and by thermal modeling. The extent of light-induced damage was investigated by cell lethality, by cell membrane permeability, and by protein inactivation. Strong particle size dependence was found for these interactions. A technique based on light to target endogenous particles is already being exploited to treat pigmented cells in dermatology and ophthalmology. With exogenous particles, phamacokinetics and biodistribution studies are needed before the method can be evaluated against photodynamic therapy for cancer treatment. However, particles are unique, unlike photosensitizers, in that they can remain stable and inert in cells for extended periods. Thus they may be particularly useful for prelabeling cells in engineered tissue before implantation. Subsequent irradiation with laser pulses will allow control of the implanted cells (inactivation or modulation) in a noninvasive manner.  (+info)

Self-assembly of single integral membrane proteins into soluble nanoscale phospholipid bilayers. (2/401)

One of the biggest challenges in pharmaceutical research is obtaining integral membrane proteins in a functional, solubilized, and monodisperse state that provides a native-like environment that maintains the spectrum of in vivo activities. Many of these integral membrane proteins are receptors, enzymes, or other macromolecular assemblies that are important drug targets. An example is the general class of proteins composed of seven-transmembrane segments (7-TM) as exemplified by the G-protein-coupled receptors. In this article, we describe a simple system for self-assembling bacteriorhodopsin, as a model protein containing 7-TM helices, with phospholipids to form a nanometer-scale soluble bilayer structure encircled by a 200 amino acid scaffold protein. The result is the single molecule incorporation of an integral membrane protein target into a soluble and monodisperse structure that allows the structural and functional tools of solution biochemistry to be applied.  (+info)

DNA nanotubes self-assembled from triple-crossover tiles as templates for conductive nanowires. (3/401)

DNA-based nanotechnology is currently being developed as a general assembly method for nanopatterned materials that may find use in electronics, sensors, medicine, and many other fields. Here we present results on the construction and characterization of DNA nanotubes, a self-assembling superstructure composed of DNA tiles. Triple-crossover tiles modified with thiol-containing double-stranded DNA stems projected out of the tile plane were used as the basic building blocks. Triple-crossover nanotubes display a constant diameter of approximately 25 nm and have been observed with lengths up to 20 microm. We present high-resolution images of the constructs, experimental evidence of their tube-like nature as well as data on metallization of the nanotubes to form nanowires, and electrical conductivity measurements through the nanowires. DNA nanotubes represent a potential breakthrough in the self-assembly of nanometer-scale circuits for electronics layout because they can be targeted to connect at specific locations on larger-scale structures and can subsequently be metallized to form nanometer-scale wires. The dimensions of these nanotubes are also perfectly suited for applications involving interconnection of molecular-scale devices with macroscale components fabricated by conventional photolithographic methods.  (+info)

Self-association process of a peptide in solution: from beta-sheet filaments to large embedded nanotubes. (4/401)

Lanreotide is a synthetic octapeptide used in the therapy against acromegaly. When mixed with pure water at 10% (w/w), Lanreotide (acetate salt) forms liquid crystalline and monodisperse nanotubes with a radius of 120 A. The molecular and supramolecular organization of these structures has been determined in a previous work as relying on the lateral association of 26 beta-sheet filaments made of peptide noncovalent dimers, the basic building blocks. The work presented here has been devoted to the corresponding self-association mechanisms, through the characterization of the Lanreotide structures formed in water, as a function of peptide (acetate salt) concentration (from 2% to 70% (w/w)) and temperature (from 15 degrees C to 70 degrees C). The corresponding states of water were also identified and quantified from the thermal behavior of water in the Lanreotide mixtures. At room temperature and below 3% (w/w) Lanreotide acetate in water, soluble aggregates were detected. From 3% to 20% (w/w) long individual and monodisperse nanotubes crystallized in a hexagonal lattice were evidenced. Their molecular and supramolecular organizations are identical to the ones characterized for the 10% (w/w) sample. Heating induces the dissolution of the nanotubes into soluble aggregates of the same structural characteristics as the room temperature ones. The solubilization temperature increases from 20 degrees C to 70 degrees C with the peptide concentration and reaches a plateau between 15% and 25% (w/w) in peptide. These aggregates are proposed to be the beta-sheet filaments that self-associate to build the walls of the nanotubes. Above 20% (w/w) of Lanreotide acetate in water, polydisperse embedded nanotubes are formed and the hexagonal lattice is lost. These embedded nanotubes exhibit the same molecular and supramolecular organizations as the individual monodisperse nanotubes formed at lower peptide concentration. The embedded nanotubes do not melt in the range of temperature studied indicating a higher thermodynamic stability than individual nanotubes. In parallel, the thermal behaviors of water in mixtures containing 2-80% (w/w) in peptide have been studied by differential scanning calorimetry, and three different types of water were characterized: 1), bulk water melting at 0 degrees C, 2), nonfreezing water, and 3), interfacial water melting below 0 degrees C. The domains of existence and coexistence of these different water states are related to the different Lanreotide supramolecular structures. All these results were compiled into a binary Lanreotide-water phase diagram and allowed to propose a self-association mechanism of Lanreotide filaments into monodisperse individual nanotubes and embedded nanotubes.  (+info)

RNA-mediated metal-metal bond formation in the synthesis of hexagonal palladium nanoparticles. (5/401)

RNA sequences have been discovered that mediate the growth of hexagonal palladium nanoparticles. In vitro selection techniques were used to evolve an initial library of approximately 10(14) unique RNA sequences through eight cycles of selection to yield several active sequence families. Of the five families, all representative members could form crystalline hexagonal palladium platelets. The palladium particle growth occurred in aqueous solution at ambient temperature, without any endogenous reducing agent, and at low concentrations of metal precursor (100 micromolar). Relative to metal precursor, the RNA concentration was significantly lower (1 micromolar), yet micrometer-size crystalline hexagonal palladium particles were formed rapidly (7.5 to 1 minutes).  (+info)

Tracking the recruitment of diabetogenic CD8+ T-cells to the pancreas in real time. (6/401)

Development of autoimmune diabetes in both humans and mice is preceded by a prolonged period of inflammation of pancreatic islets by autoreactive T-cells. Noninvasive imaging techniques, including positron-emission tomography and optical or magnetic resonance imaging, have been used to track the recruitment of lymphocytes to sites of inflammation. These techniques, however, rely on labeling strategies that are non-antigen specific and do not allow specific tracking of the recruitment of autoreactive lymphocytes. Here we describe an antigen-specific magnetic label to selectively target a prevalent population of diabetogenic CD8(+) T-cells that contribute to the progression of insulitis to overt diabetes in NOD mice. Superparamagnetic nanoparticles coated with multiple copies of a high-avidity peptide/major histocompatibility complex ligand of these T-cells (NRP-V7/K(d)) are endocytosed by CD8(+) T-cells in an antigen-specific manner. Using these T-cells as probes, we show that inflammation of pancreatic islets by autoreactive T-cells can be detected in real time by magnetic resonance imaging. This study demonstrates the feasibility of visualizing the presence of ongoing autoimmune responses noninvasively.  (+info)

Preparation of DNA-modified nanoparticles and preliminary study for colorimetric SNP analysis using their selective aggregations. (7/401)

DNA-modified nanospheres were prepared by anchoring amino-terminated oligodeoxynucleotides (ODNs) with carboxylates onto a colored polystyrene sphere surface through amido bonds. About 220 ODN molecules were immobilized onto a nanosphere 40 nm in diameter. Preliminary studies using the microspheres with 1 microm diameter reveal that the specificity of hybridization was retained after modification. Three kinds of differently colored (RGB, red/green/blue) nanospheres bearing unique ODNs on their surface were prepared for detecting the p53 gene. Each ODN is complementary to a different part in the 45mer sample that is a part of a conservative region of the p53 gene containing one of the hot spots. In a binary system using spheres R and G, the wild-type 45mer made the aggregates with yellow emission as the result of mixing both colors. The mutant 45mer containing one nucleotide displacement did not give such aggregates with distinct colors. The study of fluorescence resonance energy transfer (FRET) showed that spheres R and G directly contact each other in the aggregates with the wild type. The RGB ternary system gave aggregates with specific colors corresponding to the added ODN samples, wild type or mutant. In addition, in the presence of both samples, all of the spheres formed aggregates with white emission as a consequence of mixing three primary colors of light. This means that the present technique should allow us to conduct an allele analysis.  (+info)

Energetic clues to pathways to biomineralization: precursors, clusters, and nanoparticles. (8/401)

Nanoparticle and nanocluster precursors may play a major role in biomineralization. The small differences in enthalpy and free energy among metastable nanoscale phases offer controlled thermodynamic and mechanistic pathways. Clusters and nanoparticles offer concentration and controlled transport of reactants. Control of polymorphism, surface energy, and surface charge on nanoparticles can lead to morphological control and appropriate growth rates of biominerals. Rather than conventional nucleation and growth, assembly of nanoparticles may provide alternative mechanisms for crystal growth. The Ostwald step rule, based on a thermodynamic view of nucleation and growth, is supported by the observation that more metastable phases tend to have lower surface energies. Examples from nonbiological systems, stressing the interplay of thermodynamic and kinetic factors, illustrate features potentially important to biomineralization.  (+info)

TY - JOUR. T1 - Morphology dependence of radial elasticity in multiwalled boron nitride nanotubes. AU - Chiu, H. C.. AU - Kim, S.. AU - Klinke, C.. AU - Riedo, E.. PY - 2012/9/3. Y1 - 2012/9/3. N2 - We report on the measurement of the radial modulus of boron nitride nanotubes (BN-NTs) with various sizes and thicknesses. These BN-NTs are radially much stiffer than previously reported thinner and smaller BN-NTs. Here, we show the key role of the morphology of the nanotubes in determining their radial rigidity; in particular, we find that the external and internal radii, R ext and R int, have a stronger influence on the radial modulus than the nanotubes thickness. The radial modulus decreases nonlinearly with 1/R ext until reaching, for a large number of layers and a large radius, the transverse elastic modulus of bulk h-BN.. AB - We report on the measurement of the radial modulus of boron nitride nanotubes (BN-NTs) with various sizes and thicknesses. These BN-NTs are radially much stiffer than ...
RGD-tagged helical rosette nanotubes aggravate acute lipopolysaccharide-induced lung inflammation Sarabjeet Singh Suri1, Steven Mills1, Gurpreet Kaur Aulakh1, Felaniaina Rakotondradani2, Hicham Fenniri2, Baljit Singh11Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon; 2National Institute for Nanotechnology and Department of Chemistry, Edmonton, CanadaAbstract: Rosette nanotubes (RNT) are a novel class of self-assembled biocompatible nanotubes that offer a built-in strategy for engineering structure and function through covalent tagging of synthetic self-assembling modules (GRGDSK-G∧C motif). In this report, the GC motif was tagged with peptide Arg-Gly-Asp-Ser-Lys (RGDSK-G∧C) and amino acid Lys (K-G∧C) which, upon co-assembly, generate RNTs featuring RGDSK and K on their surface in predefined molar ratios. These hybrid RNTs, referred to as Kx/RGDSKy-RNT, where x and y refer to the molar ratios of K-G∧C and RGDSK-G∧C, were designed to target neutrophil integrins
TY - JOUR. T1 - Antimicrobial loading of nanotubular titanium surfaces favoring surface coverage by mammalian cells over bacterial colonization. AU - Ren, Xiaoxiang. AU - van der Mei, Henny C.. AU - Ren, Yijin. AU - Busscher, Henk J.. AU - Peterson, Brandon W.. PY - 2021/4. Y1 - 2021/4. N2 - Titanium is frequently used for dental implants, percutaneous pins and screws or orthopedic joint prostheses. Implant surfaces can become peri-operatively contaminated by surgically introduced bacteria during implantation causing lack of surface coverage by mammalian cells and subsequent implant failure. Especially implants that have to function in a bacteria-laden environment such as dental implants or percutaneous pins, cannot be surgically implanted while being kept sterile. Accordingly, contaminating bacteria adhering to implant surfaces hamper successful surface coverage by mammalian cells required for long-term functioning. Here, nanotubular titanium surfaces were prepared and loaded with Ag ...
A plasma treatment has been used to modify the surface of BNNTs. In one example, the surface of the BNNT has been modified using ammonia plasma to include amine functional groups. Amine functionalization allows BNNTs to be soluble in chloroform, which had not been possible previously. Further functionalization of amine-functionalized BNNTs with thiol-terminated organic molecules has also been demonstrated. Gold nanoparticles have been self-assembled at the surface of both amine- and thiol-functionalized boron nitride Nanotubes (BNNTs) in solution. This approach constitutes a basis for the preparation of highly functionalized BNNTs and for their utilization as nanoscale templates for assembly and integration with other nanoscale materials.
In the present work, Boron nitride nanotubes (BNNTs) were synthesized and submitted to a functionalization process (coating) with glucosamine. The nanostructures were physicochemical and morphologically characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Raman Spectroscopy and Photon Correlation Spectroscopy (PCS). Furthermore, in vitro tests were conducted to evaluate the cytocompatibility of the nanostructures. The results revealed that nanotubes presented size, polydispersity index and Zeta potential adequate to applied in vivo studies. The cytocompatibility test were conducted in normal MRC-5 fibroblast lung cells, through MTT and DAPI assays. The results revealed, in tested concentrations (0.1; 10; 50; 100; 200 µ/mL), that BNNTs no presented a cytotoxic profile and negligible DNA changes. Considering the results obtained, the BNNTs showed adequate characteristic to be applied as novel carrier system for radioisotope and drug delivery.
In the present work, based on extensive fully atomistic molecular dynamics simulations, we discuss the dynamics of neon atoms oscillating inside (5,5) single-walled carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs). Our results show that sustained high-frequency oscillatory regimes are possible for a large range of temperatures. Our results also show that the general features of the oscillations are quite similar to those observed in CNT and BNNT, in contrast with some speculations in previous works in the literature about the importance of broken symmetry and chirality exhibited by BNNTs ...
We investigate the ultrafast structural dynamics of multi-walled boron nitride nanotubes (BNNTs) upon femtosecond optical excitation using ultrafast electron diffraction in a transmission electron microscope. Analysis of the time-resolved (100) and (002) diffraction profiles reveals highly anisotropic lattic
M. Yamaguchi,A. Pakdel,C. Y. Zhi,et al. Utilization Of Multiwalled Boron Nitride Nanotubes For The Reinforcement Of Lightweight Aluminum Ribbons[J]. Nanoscale Research Letters,2013,8 ...
Our unique plasma synthesis process produces high quality BNNT material. This process does not use consumable electrodes or metallic catalysts, and is therefore completely free from metallic contaminants.. Our BNNT purified is produced using a proprietary process which removes free Boron. It also offers a high concentration of boron nitride nanotubes with small diameter, high crystallinity and high purity.. ...
By combining them with fluorescent molecules, researchers have, for the first time, been able to study the real-time dynamics of boron nitride nanotubes.
Boron nitride aerogel is an aerogel made of highly porous boron nitride (BN). It typically consists of a mixture of deformed boron nitride nanotubes and nanosheets. It can have a density as low as 0.6 mg/cm3 and a specific surface area as high as 1050 m2/g, and therefore has potential applications as an absorbent, catalyst support and gas storage medium. BN aerogels are highly hydrophobic and can absorb up to 160 times their mass in oil. They are resistant to oxidation in air at temperatures up to 1200 °C, and hence can be reused after the absorbed oil is burned out by flame. BN aerogels can be prepared by template-assisted chemical vapor deposition at a temperature ~900 °C using borazine as the feed gas. Alternatively it can be produced by ball milling h-BN powder, ultrasonically dispersing it in water, and freeze-drying the dispersion. Song, Yangxi; Li, Bin; Yang, Siwei; Ding, Guqiao; Zhang, Changrui; Xie, Xiaoming (2015). Ultralight boron nitride aerogels via template-assisted chemical ...
This new market research report forecasts on Wurtzite Boron Nitride Market providing complete market figures, consisting market size and estimation by Wurtzite Boron Nitride Market application and products depending upon geographical location for the forecasting period 2017 to 2025. Further, the Wurtzite Boron Nitride Market research report study also encompasses complete industry background, with Wurtzite Boron Nitride Market drivers, competitive market dynamics, market restraints, market growth opportunities, industry challenges and critical success factors (CSFs). The Wurtzite Boron Nitride Market research report examines top industry competitors, offering organization market share analysis and detailed outlines of these firms, with product benchmarking.. Browse Full Report Visit - http://bit.ly/2eO1ezQ. Reasons to Buy This Report :. ...
Self-organized anodic titania (TiO2) nanotube arrays are an interesting model anode material for use in Li-ion batteries owing to their excellent rate capability, their cycling stability and their enhanced safety compared to graphite. A composite material where carbothermally treated conductive TiO2 nanotubes are used as support for a thin silicon film has been shown to have the additional advantage of high lithium storage capacity. This article presents a detailed comparison of the structure, surface and bulk morphology of self-organized conductive TiO2 nanotube arrays, with and without silicon coating, using a combination of X-ray diffraction, X-ray reflectivity, grazing-incidence small-angle X-ray scattering (GISAXS) and time-of-flight grazing-incidence small-angle neutron scattering (TOF-GISANS) techniques. X-ray diffraction shows that the nanotubes crystallize in the anatase structure with a preferred (004) orientation. GISAXS and TOF-GISANS are used to study the morphology of the nanotube ...
Gold nanorods with three different aspect ratios were prepared and their dual capabilities for two-photon imaging and two-photon photodynamic therapy have been demonstrated. These gold nanorods exhibit large two-photon absorption action cross-sections, about two orders of magnitude larger than small organic molecules, which makes them suitable for two-photon imaging. They can also effectively generate singlet oxygen under two-photon excitation, significantly higher than traditional photosensitizers such as Rose Bengal and Indocyanine Green. Such high singlet oxygen generation capability under two-photon excitation was ascribed to their large two-photon absorption cross-sections. Polyvinylpyrrolidone (PVP) coated gold nanorods displayed excellent biocompatibility and high cellular uptake efficiency. The two-photon photodynamic therapy effect and two-photon fluorescence imaging properties of PVP coated gold nanorods have been successfully demonstrated on HeLa cells in vitro using fluorescence ...
Graphene-Boron Nitride nanohybrid materials are a class of compounds created from graphene and boron nitride nanosheets. Graphene and boron nitride both contain intrinsic thermally conductive and electrically insulative properties. The combination of these two compounds may be useful to advance the development and understanding of electronics. Several efforts have been made to create hybrid nanomaterials to explore their novel properties compared to their individual constituents. Studies have shown that nanohybrid materials distinctively utilize the best aspects of the individual constituents along with their novel functionalities though structural integrity and interfacial chemical bonding of the constituents. Graphene boron nitride nanohybrid materials are created through synthetic methods such as electron beam welding and chemical vapor deposition. Various different heterostructures of graphene and boron nitride can be assembled. Due to their isostructural, nearly lattice matched and ...
Listed below are low site density, vertically aligned carbon nanotube arrays grown on Chromium coated Silicon substrate, which are offered as overstock items. These one-of-a-kind arrays and forests were produced for other customers or for our internal R&D efforts. SEM images are available. If they fit your needs, these aligned nanotube arrays can be shipped to you the same day ...
The purpose of this study was to develop novel nanoscale biosensors using titania nanotubes (TNTs) made by anodization. Titania nanotubes were produced on pure titanium sheets by anodization at room temperature. In this research, the electrolyte composition ethylene glycol 250 mL/NH4F 1.5 g/DI water 20 mL was found to produce the best titania nanotubes array films for application in amperometric biosensors. The amperometric results exhibit an excellent linearity for uric acid (UA) concentrations in the range between 2 and 14 mg/dL, with 23.3 (µA·cm−2)·(mg/dL)−1 UA sensitivity, and a correlation coefficient of 0.993. The glucose biosensor presented a good linear relationship in the lower glucose concentration range between 50 and 125 mg/dL, and the corresponding sensitivity was approximately 249.6 (µA·cm−2)·(100 mg/dL)−1 glucose, with a correlation coefficient of 0.973.
In this work, a chiral hybrid superstructure has been achieved through a hierarchical, cooperative self-assembly/self-organization process in a multiple-component system comprising of gold nanorods, surfactants, and phospholipids film. This chiral hybrid superstructure presented a signate signal in plasmonic circular dichroism with negative collective plasmonic modes on one side of the plasmon resonance and positive modes on the other side. The origin of such an unusual optical activity is fundamentally different from that of chiral metal nanoparticles/nanoclusters in previous studies. We highlight here a possibility that helical alignment of gold nanorods in the hybrid superstructure would resemble mesogenic molecules in a cholesteric liquid crystalline mesophase, and the Coulomb dipole-dipole interactions between gold nanorods in such a chiral liquid crystalline-like mesophase would give rise to the plasmonic circular dichroism effect. This study also demonstrated a facile approach for ...
Nitrogen-doped titania nanotubes exhibiting catalytic activity on exposure to any one or more of ultraviolet, visible, and/or infrared radiation, or combinations thereof are disclosed. The nanotube arrays may be co-doped with one or more nonmetals and may further include co-catalyst nanoparticles. Also, methods are disclosed for use of nitrogen-doped titania nanotubes in catalytic conversion of carbon dioxide alone or in admixture with hydrogen-containing gases such as water vapor and/or other reactants as may be present or desirable into products such as hydrocarbons and hydrocarbon-containing products, hydrogen and hydrogen-containing products, carbon monoxide and other carbon-containing products, or combinations thereof.
TY - JOUR. T1 - Energy transfer between a biological labelling dye and gold nanorods. AU - Racknor, Chris AU - Singh, Mahi R. AU - Zhang, Yinan. AU - Birch, David J S. AU - Chen, Yu. PY - 2014/3/1. Y1 - 2014/3/1. N2 - We have demonstrated energy transfer between a biological labelling dye (Alexa Fluor 405) and gold nanorods experimentally and theoretically. The fluorescence lifetime imaging microscopy and density matrix method are used to study a hybrid system of dye and nanorods under one- and two-photon excitations. Energy transfer between dye and nanorods via the dipole-dipole interaction is found to cause a decrease in the fluorescence lifetime change. Enhanced energy transfer from dye to nanorods is measured in the presence of an increased density of nanorods. This study has potential applications in fluorescence lifetime-based intra-cellular sensing of bio-analytes as well as nuclear targeting cancer therapy. AB - We have demonstrated energy transfer between a biological labelling dye ...
Gold nanorods (GNRs) have been widely used for bio-imaging. However, GNRs assisted optical in vivo deep tissue imaging is severely restricted due to signal attenuation, low contrast, complex process or low real-timing. To overcome these problems, we functionalized GNRs with both near-infrared (NIR) fluorescence and surface enhanced Raman scattering (SERS) and utilized these co-functionalized GNRs for purely optical in vivo imaging of live mice. Our proposed technology has the combined advantages of high real-timing, high imaging contrast and deep detection ability. The distribution and excretion of intravenously injected GNRs in deep tissues of live mice were observed in vivo for the first time through purely optical imaging. We also demonstrated successfully in vivo biomedical applications of the co-functionalized GNRs to sentinel lymph node (SLN) mapping and tumor targeting of mice. The present technology has great future potentials for disease diagnosis and clinical therapies.. ...
|p|Ab-initio calculations using density functional theory (DFT) are used to investigate the non-covalent interactions between single wall armchair boron nitride nanotubes (BNNTs) with open ends and several heterocyclic molecules: thiophene (T; C|sub|4|/sub|H|sub|4|/sub|S), benzothiophene (BT; C8H6S) and dibenzothiophene (DBT; C|sub|12|/sub|H|sub|8|/sub|S). In the armchair model the nanotubes exhibit (n, n) chirality; here we consider n = 5. The exchange-correlation energies are treated according to the Hamprecht-Cohen-Tozer-Handy functional in the generalized gradient approximation (HCTH-GGA). A base function with double polarization is used. The geometry optimization of (5,5) BNNT-X; X = T, BT and DBT has been carried out using the minimum energy criterion in 5 different configurations of the molecules adsorbed on the nanotube. Our computer simulations have found that the preferential adsorption site of the molecule on the nanotube surface is the parallel configuration for BT and DBT, and at one
The invention provides a halloysite Ag-carrying antibacterial agent and a preparation method thereof. The preparation method comprises the following steps: (1) activating halloysite: adding the halloysite with the purity of not less than 80wt% to 1-5wt% of nitric acid solution, and stirring for activating at normal temperature, wherein, the solid-to-liquid ratio of a reaction system is 5-10% (mass percent); (2) drying: centrifugally dewatering and drying the activated halloysite to obtain the activated and dried halloysite; (3) loading: preparing 0.5-3wt% of silver nitrate solution, adjusting the pH value of the silver nitrate solution with dilute nitric acid to 5-6, adding the activated and dried halloysite, and stirring at the temperature of 40-60 DEG C for 0.5-2h, wherein, the solid-to-liquid ratio of a reaction system is 5-20% (mass percent); and (4) after reaction is ended, carrying out centrifugal filtration on the product, washing and drying the obtained filter cake to obtain the halloysite
Although TiO2 nanotubes have unique properties making them attractive for variety of applications, their poor adhesion to the substrate is a major limitation. In order to overcome this limitation, a facile route, combination of a two-step anodic treatment and Although TiO2 nanotubes have unique properties making them attractive for variety of applications, their poor adhesion to the substrate is a major limitation. In order to overcome this limitation, a facile route, combination of a two-step anodic treatment and heat treatment was applied in order to develop a well-adhered TiO2-based nanotubular surface on Ti-40Nb alloy. The adhesion of the nanotubular layer was evaluated by Daimler-Benz Rockwell C test. Corrosion and tribocorrosion behavior was investigated in phosphate-buffered saline solution (PBS) at body temperature. Corrosion behavior was examined by potentiodynamic polarization and electrochemical impedance spectroscopy whereas tribocorrosion behavior was evaluated by reciprocating ...
Abstract: Neural prostheses have become ever more acceptable treatments for many different types of neurological damage and disease. Here we investigate the use of two different morphologies of titania nanotube arrays as interfaces to advance the longevity and effectiveness of these prostheses. The nanotube arrays were characterized for their nanotopography, crystallinity, conductivity, wettability, surface mechanical properties and adsorption of key proteins: fibrinogen, albumin and laminin. The loosely packed nanotube arrays fabricated using a diethylene glycol based electrolyte, contained a higher presence of the anatase crystal phase and were subsequently more conductive. These arrays yielded surfaces with higher wettability and lower modulus than the densely packed nanotube arrays fabricated using water based electrolyte. Further the adhesion, proliferation and differentiation of the C17.2 neural stem cell line was investigated on the nanotube arrays. The proliferation ratio of the cells as ...
Abstract: Neural prostheses have become ever more acceptable treatments for many different types of neurological damage and disease. Here we investigate the use of two different morphologies of titania nanotube arrays as interfaces to advance the longevity and effectiveness of these prostheses. The nanotube arrays were characterized for their nanotopography, crystallinity, conductivity, wettability, surface mechanical properties and adsorption of key proteins: fibrinogen, albumin and laminin. The loosely packed nanotube arrays fabricated using a diethylene glycol based electrolyte, contained a higher presence of the anatase crystal phase and were subsequently more conductive. These arrays yielded surfaces with higher wettability and lower modulus than the densely packed nanotube arrays fabricated using water based electrolyte. Further the adhesion, proliferation and differentiation of the C17.2 neural stem cell line was investigated on the nanotube arrays. The proliferation ratio of the cells as ...
Recent observations have revealed that intercellular connections can be formed through membrane nanotubes. These delicate structures could facilitate transport of organelles and membrane proteins between cells. The sharing of cell surface and cytoplasmic components between cells could be commonplace in biology, but an important physiological role for membrane nanotubes between immune cells is difficult to test with current technology.. ...
TY - JOUR. T1 - An intensified π-hole in beryllium-doped boron nitride meshes. T2 - its determinant role in CO2 conversion into hydrocarbon fuels. AU - Azofra, Luis Miguel. AU - Macfarlane, Douglas. AU - Sun, Chenghua. PY - 2016/2/28. Y1 - 2016/2/28. N2 - DFT investigations on beryllium-doped boron nitride meshes or sheets (BNs) predict the existence of a very reactive kind of novel material capable of spontaneously reducing the first hydrogenation step in the CO2 conversion mechanism. This impressive behaviour appears as a result of the very deep π-hole generated by the beryllium moieties, and also determines its selectivity towards the production of CH4.. AB - DFT investigations on beryllium-doped boron nitride meshes or sheets (BNs) predict the existence of a very reactive kind of novel material capable of spontaneously reducing the first hydrogenation step in the CO2 conversion mechanism. This impressive behaviour appears as a result of the very deep π-hole generated by the beryllium ...
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Researchers at McGill University have developed a new, low-cost method to build DNA nanotubes block by block -- a breakthrough that could help pave the way for scaffolds made from DNA strands to be used in applications such as optical and electronic devices or smart drug-delivery systems.
From the Science Documentaries website: Productive Nanosystems, Superhydrophobic Carbon Nanotube Array, Nanotechnology at Berkeley, Nanotopia ...
Membrane nanotubes play important functional roles in numerous cell activities such as cellular transport and communication. By exerting an external pulling force over a finite region in a membrane patch, here we investigate the size dependence of the membrane nanotube formation under the continuum and atomistic mo
Page contains details about carbon nanotube array/Fe/Al2O3 . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
TY - GEN. T1 - Anodization of highly ordered titania nanotube prepared with organic electrolyte. AU - Suharno, Bambang. AU - Ramadhanti, Nabila. AU - Aryani, Nadya. AU - Zakiyuddin, Ahmad. AU - Supriadi, Sugeng. PY - 2020/1/1. Y1 - 2020/1/1. N2 - Ti-6Al-4V as an implant material has bio-inert properties, so it does not support any tissues or bone cells reaction. This study aims to increase the tendency of osteoblasts cell attachment to the surface of implant Ti-6Al-4V by fabricating nanotube structure on the surface by anodization. This study also conducted to study the effect of elements from titanium alloys and organic electrolytes on the mechanism of formation of nanotube structures. The anodization method was chosen because it was easy to do, effective, and inexpensive. The samples were prepared by ground and polished, then washed by ultrasonic. Anodization used organic electrolytes in the form of a mixture of ethylene glycol, 0.5 M NH4F, and 4 w.t% deionized water. The study of the effect ...
Page contains details about Ti microwire covered with highly ordered Nb2O5-coated TiO2 nanotube arrays . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Gold nanorods (GNRs) combined with two-photon microscopy were explored for potential application in imaging of oral carcinogenesis. GNRs have been shown to be effective contrast agents for two photon luminescence in that excitation laser powers required for imaging are low compared to traditional fluorophores. Imaging of cells, ex vivo tissues, and in vivo oral mucosa labeled with GNRs was performed to evaluate potential advantages of these agents in molecular imaging of epithelial carcinogenesis. Powers required to elicit a two-photon luminescence signal from GNRs were determined for cells as well as normal and malignant transformed lesions, 24 hours following injection of GNRs in a hamster model for oral cancer. The strength of the detected emission as the function of the average incident laser power was measured in tissues with and without GNRs to compare the sensitivity of GNRs against tissue autofluorescence. Finally, in vivo imaging was performed immediately following GNR injection to ...
A facile strategy to fabricate gold [email protected] acid/calcium phosphate ([email protected]/CaP) yolk-shell nanoparticles (NPs) composed with a PAA/CaP shell and an AuNR yolk is reported. The as-obtained [email protected]/CaP yolk-shell NPs possess ultrahigh doxorubicin (DOX) loading capability (1 mg DOX/mg NPs), superior photothermal conversion property (26%) and pH/near-infrared (NIR) dual-responsive drug delivery performance. The released DOX continuously increased due to the damage of the CaP shell at low pH values. When the DOX-loaded [email protected]/CaP yolk-shell NPs were exposed to NIR irradiation, a burst-like drug release occurs owing to the heat produced by the AuNRs. Furthermore, [email protected]/CaP yolk-shell NPs are successfully employed for synergic dual-mode X-ray computed tomography (CT)/photoacoustic (PA) imaging and chemo-photothermal cancer therapy. Therefore, this work brings new insights for the synthesis of multifunctional nanomaterials and extends theranostic applications.. ...
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TY - JOUR AU - Savić, Branislava AU - Stanković, Dalibor M. AU - Živković, Sanja AU - Ognjanović, Miloš AU - Tasić, Gvozden S. AU - Mihajlović, Ivana J. AU - Brdarić, Tanja PY - 2020 UR - https://vinar.vin.bg.ac.rs/handle/123456789/9064 AB - A novel anode based on PbO2-GNRs nanocomposites was synthesized in order to investigate the simultaneous electrochemical oxidation of phenolic compounds in a mixture of methyl and chloro substituted phenols in alkaline solution (pH = 8.3). The crystal structure, morphology and composition of the synthesized materials were characterized using X-ray powder diffraction (XRPD), field emission scanning electron microscopy with energy dispersive X-ray spectrometer (FESEM-EDX) and transmission electron microscopy (TEM). FESEM images confirmed the presence of PbO2 nanoparticles on the PbO2-GNRs composite. The cyclic voltammetry measurements of the PbO2-GNRs electrode in 0.1 M Na2SO4 electrolyte indicated the electrochemical oxidation of phenol via indirect ...
In the Johns Hopkins study, these building blocks attached themselves to separate molecular anchor posts, representing where the connecting bridge would begin and end. The segments formed two nanotube chains, each one extending away from its anchor post. Then, like spaghetti in a pot of boiling water, the lengthening nanotube chains wriggled about, exploring their surroundings in a random fashion. Eventually, this movement allowed the ends of the two separate nanotube strands to make contact with one another and snap together to form a single connecting bridge span.. To learn more about how this process occurs, the researchers used microscopes to watch the nanotubes link to their molecular landmarks, which were labeled with different colored fluorescent dyes and attached to transparent glass. The teams video equipment also captured the formation of nanotubes spans, as the two bridge segments lengthened and ultimately connected. Completion of each nanoscale bridge in the accompanying example ...
In another paper, published in the Journal of Physical Chemistry C, a team of investigators led by Paras Prasad, Ph.D., principal investigator of the National Cancer Institutes Cancer Nanotechnology Platform Partnership at the State University of New York at Buffalo, has shown that gold nanorods linked to a protein known as transferrin also target cancer cells and enable them to be detected using optimal imaging. In this case, the nanorods were taken into tumor cells bearing the transferrin receptor, where they accumulate in sufficient numbers to shine brightly when irradiated by light. Healthy cells, which have but a few transferrin receptors on their surfaces, did not accumulate the targeted nanorods ...
Many proteins in the cell sense and induce membrane curvature. We describe a method to pull membrane nanotubes from lipid vesicles to...
The present disclosure describes carbon nanotube arrays having carbon nanotubes grown directly on a substrate and methods for making such carbon nanotube arrays. In various embodiments, the carbon nanotubes may be covalently bonded to the substrate by nanotube carbon-substrate covalent bonds. The present carbon nanotube arrays may be grown on substrates that are not typically conducive to carbon nanotube growth by conventional carbon nanotube growth methods. For example, the carbon nanotube arrays of the present disclosure may be grown on carbon substrates including carbon foil, carbon fibers and diamond. Methods for growing carbon nanotubes include a) providing a substrate, b) depositing a catalyst layer on the substrate, c) depositing an insulating layer on the catalyst layer, and d) growing carbon nanotubes on the substrate. Various uses for the carbon nanotube arrays are contemplated herein including, for example, electronic device and polymer composite applications ...
Well aligned ZnO nanorods have been prepared by a low temperature aqueous chemical growth method, using a biocomposite seed layer of ZnO nanoparticles prepared in starch and cellulose bio polymers. The effect of different concentrations of biocomposite seed layer on the alignment of ZnO nanorods has been investigated. ZnO nanorods grown on a gold-coated glass substrate have been characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) techniques. These techniques have shown that the ZnO nanorods are well aligned and perpendicular to the substrate, and grown with a high density and uniformity on the substrate. Moreover, ZnO nanorods can be grown with an orientation along the c-axis of the substrate and exhibit a wurtzite crystal structure with a dominant (002) peak in an XRD spectrum and possessed a high crystal quality. A photoluminescence (PL) spectroscopy study of the ZnO nanorods has revealed a conventional near band edge ultraviolet emission, along with
In this work, ZnO nanorods were hydrothermally grown on the gold-coated glass substrate and characterized by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) techniques. The ZnO nanorods were functionalized by two different approaches and performance of the sensor electrode was monitored. Fourier transform infrared spectroscopy (FTIR) was carried out for the confirmation of interaction between the ionophore molecules and ZnO nanorods. In addition to this, the surface of the electrode was characterized by X-ray photoelectron spectroscopy (XPS) showing the chemical and electronic state of the ionophore and ZnO nanorod components. The ionophore solution was prepared in the stabilizer, poly vinyl chloride (PVC) and additives, and then functionalized on the ZnO nanorods that have shown the Nernstian response with the slope of 31 mV/decade. However, the Cu2+ ion sensor was fabricated only by immobilizing the selective copper ion ionophore membrane without the use of PVC, ...
TY - JOUR. T1 - Nonradiative energy transfer in ZnO nanorods/dye-doped polymer heterostructures. AU - Park, Jun Kue. AU - Lee, Kyu Won. AU - Lee, W.. AU - Lee, Cheol Eui. N1 - Funding Information: This work was supported by the Korea Ministry of Education, Science and Technology (National Research Laboratory Grant No. R0A-2008-000-20066-0, User Program of Proton Engineering Frontier Project, Grant No. KRF-2006-005-J03601) and by the Seoul Research and Business Development Program (Grant No. 10583). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged. PY - 2009. Y1 - 2009. N2 - Nonradiative energy transfer from the ZnO nanorods (donor) to fluorescent dye-doped polymer (acceptor) was investigated in heterostructures of ZnO nanorods/dye-doped polymer films, with the fluorescent dye, 4-(dicyanomethylene) -2-methyl-6-(4-dimethylaminostyryl)-4H-pyran, being doped into the host material, poly(9-vinylcarbazole). Introduction of the ZnO nanorods layer to the dye-doped polymer ...
Boron Nitride Nanotubes and Phonon Polaritons:. Kim, K. S.; Gilburd, L.; Ho, K.; Trajanoski, D.; Maiti, A.; Halverson, D.; van der Velden, L.; de Beer, S.; Walker, G. C. The Effect of Adjacent Materials on the Propagation of Phonon Polaritons in Hexagonal Boron Nitride, J Phys. Chem. Lett., 2017.. Gilburd, L.; Kim, K. S.; Ho, K.; Trajanoski, D.; Maiti, A.; Halverson, D.; de Beer, S.; Walker, G. C. Hexagonal Boron Nitride Self-Launches Hyperbolic Phonon Polaritons, J Phys. Chem. Lett., 2017, 8, 2158-2162. Gilburd, L.; Xu, X. G.; Bando,Y. Golberg, D.; Walker, G C. Surface Phonon Coupling within Boron Nitride Nanotubes Resolved by a Novel Near-Field Infrared Pump-Probe Imaging Technique, Microsc. Microanal., 2016, 22, 366-367.. Xu, X. G.; Gilburd, L.; Bando, Y.; Golberg, D.; Walker, G. C. Defects and Deformation of Boron Nitride Nanotubes Studied by Joint Nanoscale Mechanical and Infrared Near-Field Microscopy, J. Phys. Chem. C, 2016, DOI: 10.1021/acs.jpcc.5b10670. Xu, X. G.; Ghamsari, B. ...
Use DiagNano™ PEG-Amine Silica-Coated Gold Nanorods, 40 nm, Absorption Max 600 nm, 30 nm Silica Shell for fast, easy, and consistent DNA/RNA Purification, Antibody/Protein Purification, Cell Isolation.
Use DiagNano™ PEG-Amine Silica-Coated Gold Nanorods, 40 nm, Absorption Max 700 nm, 30 nm Silica Shell for fast, easy, and consistent DNA/RNA Purification, Antibody/Protein Purification, Cell Isolation.
LONDON - The global carbon nanotubes market is dominated by the Asia-Pacific region, followed by the USA and Europe. The growth of the Chinese, Korean and Indian markets and the technological breakthroughs in the field of carbon nanotubes are the main factors contributing to the growth of the Asia-Pacific market for carbon nanotubes. The Europe market for carbon nanotubes is the fastest growing market due to the financial support of the local authorities.. The global market for carbon nanotubes is ruled by several players such as Arkema, Showa Denko K.K, Bayer MaterialScience AG, Hanwha Nanotech Corporation, Shenzhen Nanotech Port Co. Ltd., amidst others. By 2016, the carbon nanotubes industry is likely to outnumber USD 1 billion. The prices for carbon nanotubes are predicted to decrease by around 15% in the nearest future.. New report The Global Market For Carbon Nanotubes To 2020 created by Future Markets analyzes the global carbon nanotubes market. The study offers comprehensive data on the ...
TY - JOUR. T1 - Enhanced Infrared Neural Stimulation using Localized Surface Plasmon Resonance of Gold Nanorods. AU - Eom, Kyungsik. AU - Kim, Jinhyung. AU - Choi, Jong Min. AU - Kang, Taekyeong. AU - Chang, Jin Woo. AU - Byun, Kyung Min. AU - Jun, Sang Beom. AU - Kim, Sung June. PY - 2014/10/1. Y1 - 2014/10/1. N2 - An advanced optical activation of neural tissues is demonstrated using pulsed infrared light and plasmonic gold nanorods. Photothermal effect localized in plasma membrane triggers action potentials of in vivo neural tissues. Compared with conventional infrared stimulation, the suggested method can increase a neural responsivity and lower a threshold stimulation level significantly, thereby reducing a requisite radiant exposure and the concern of tissue damage.. AB - An advanced optical activation of neural tissues is demonstrated using pulsed infrared light and plasmonic gold nanorods. Photothermal effect localized in plasma membrane triggers action potentials of in vivo neural ...
Near-resonant second-harmonic generation (SHG) in c-axis oriented ZnO nanorods is studied under the femtosecond laser with wavelength from 780 nm to 810 nm. A highly efficient SHG is obtained, which is attributed to the d{sub 131} component of the second-order nonlinear susceptibility. The largest d{sub 131} value is estimated to be 10.2 pm/V at the pumping wavelength of 800 nm, which indicates a large SHG response of the c-axis oriented ZnO nanorods in the near-resonant region. Theoretical calculation based on finite-difference time-domain simulation suggests a four-fold local-field enhancement of the SHG. ...
To provide a composition for a three-dimensional integrated circuit capable of forming a filling interlayer excellent in thermal conductivity also in a thickness direction, using agglomerated boron nitride particles excellent in the isotropy of thermal conductivity, disintegration resistance and kneading property with a resin. A composition for a three-dimensional integrated circuit, comprising agglomerated boron nitride particles which have a specific surface area of at least 10 m2/g, the surface of which is constituted by boron nitride primary particles having an average particle size of at least 0.05 μm and at most 1 μm, and which are spherical, and a resin (A) having a melt viscosity at 120° C. of at most 100 Pa·s.
The strength of the sp² carbon-carbon bonds gives carbon nanotubes amazing mechanical properties. The stiffness of a material is measured in terms of its Youngs modulus, the rate of change of stress with applied strain. The Youngs modulus of the best nanotubes can be as high as 1000 GPa which is approximately 5x higher than steel. The tensile strength, or breaking strain of nanotubes can be up to 63 GPa, around 50x higher than steel. These properties, coupled with the lightness of carbon nanotubes, gives them great potential in applications such as aerospace. It has even been suggested that nanotubes could be used in the space elevator, an Earth-to-space cable first proposed by Arthur C. Clarke. The electronic properties of carbon nanotubes are also extraordinary. Especially notable is the fact that nanotubes can be metallic or semiconducting depending on their structure. Thus, some nanotubes have conductivities higher than that of copper, while others behave more like silicon. There is ...
Nanotubular materials have many favorable properties for drug delivery. We present here a pioneering study of controlled release of a model drug, amoxicillin, from the internal nanopore structure of self-ordered, periodically spaced-apart aluminum oxide with an innovative, nanotubular geometry. This aluminum oxide nanotube geometry has not yet been revealed for biological applications, thus we have selected this oxide nanotube structure and demonstrated its ability as a drug carrier. Controlled, sustained release was achieved for over 5 weeks. The release kinetics from the nanotube layer was thoroughly characterized and it was determined that the amount of drug released was proportional to the square root of time. This type of controlled release and longevity from the nanotube layer has potential for therapeutic surface coatings on medical implants. Furthermore, this type of geometry has many features that are advantageous and biologically relevant for enhancing tissue biointegration.
0039]Preferably the carbon nanotubes are added to the precursor in such an amount that the weight fraction of carbon nanotubes in the composite after carbonization of the precursor is at least 5%, preferably between 5 and 10%. To adjust the weight fraction of carbon nanotubes to the desired range, the weight loss upon carbonization has to be taken into account. The weight loss of the biopolymer or seaweed can be determined from thermogravimetric studies of the carbonization behavior of the precursor without carbon nanotubes added. When composites containing a pure biopolymer and purified carbon nanotubes are carbonized, it can be reasonably assumed that no consumption of the carbon nanotubes occurs during the carbonization process. On the other hand, when the composite contains raw seaweeds, it cannot be ruled out that the seaweeds contain substances like metal cations like Ca2+, Na.sup.+ and/or K.sup.+ which catalyze the oxidation of carbon, thus leading to a partial consumption of the carbon ...
In this paper we report on a lithium ion battery (LIB) based on improved olivine lithium iron phosphate/carbon (LiFePO4/C) as cathode material and LiNa0.02K0.01FePO4/C synthesized by sol-gel method and TiO2 nanotube arrays (TNAs) with an anatase phasesynthesized through anodization of Ti foil as an anode electrode. Crystallographic structure and surface morphology of the cathode and anode materials were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical characterization of the Li-LiNa0.02K0.01FePO4/C and Li-TNAs half-cells and LiNa0.02K0.01FePO4/C-TNAs full-cell configuration was carried out through cyclic voltammetry (CV) and charge/discharge analysis. The operating potential and the first discharge capacity of the full cell were about 1.7 V and 127 mAhg-1 (at 0.5 C), respectively, and stayed stable for up to 100 cycles with limited capacity fading. Therefore, this system (full-cell) is characterized by enhanced electrochemical properties, a high safety
This invention is directed to making chemical derivatives of carbon nanotubes and to uses for the derivatized nanotubes, including making arrays as a basis for synthesis of carbon fibers. In one embodiment, this invention also provides a method for preparing single wall carbon nanotubes having substituents attached to the side wall of the nanotube by reacting single wall carbon nanotubes with fluorine gas and recovering fluorine derivatized carbon nanotubes, then reacting fluorine derivatized carbon nanotubes with a nucleophile. Some of the fluorine substituents are replaced by nucleophilic substitution. If desired, the remaining fluorine can be completely or partially eliminated to produce single wall carbon nanotubes having substituents attached to the side wall of the nanotube. The substituents will, of course, be dependent on the nucleophile, and preferred nucleophiles include alkyl lithium species such as methyl lithium. Alternatively, fluorine may be fully or partially removed from fluorine
This invention is directed to making chemical derivatives of carbon nanotubes and to uses for the derivatized nanotubes, including making arrays as a basis for synthesis of carbon fibers. In one embodiment, this invention also provides a method for preparing single wall carbon nanotubes having substituents attached to the side wall of the nanotube by reacting single wall carbon nanotubes with fluorine gas and recovering fluorine derivatized carbon nanotubes, then reacting fluorine derivatized carbon nanotubes with a nucleophile. Some of the fluorine substituents are replaced by nucleophilic substitution. If desired, the remaining fluorine can be completely or partially eliminated to produce single wall carbon nanotubes having substituents attached to the side wall of the nanotube. The substituents will, of course, be dependent on the nucleophile, and preferred nucleophiles include alkyl lithium species such as methyl lithium. Alternatively, fluorine may be fully or partially removed from fluorine
Nano Size Effects of TiO2 Nanotube Array on the Glioma Cells Behavior. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
A process for producing boron nitride using a boron containing ore as a starting material, by reacting naturally occurring ulexite with ammonia at high temperature, for a boron nitride with high impur
High-density well-aligned ZnO nanorod array was successfully synthesized on a PLD prepared undoped ZnO film by a catalyst-free method. X-ray diffraction and scanning electron microscopy show that the nanorods are well-oriented perpendicular to the substrate. The photoluminescence from free excitons and Raman spectra of the ZnO nanorods reflect the high purity and nearly defect free structure of nanorods. The well-aligned feature of the nanorod array is attributed to the nanorods’ epitaxial growth from the ZnO film ...
148. Kim, K. S.; Gilburd, L.; Ho, K.; Trajanoski, D.; Maiti, A.; Halverson, D.; van der Velden, L.; de Beer, S.; Walker, G. C. The Effect of Adjacent Materials on the Propagation of Phonon Polaritons in Hexagonal Boron Nitride, J Phys. Chem. Lett., 2017.. 147. Gilburd, L.; Kim, K. S.; Ho, K.; Trajanoski, D.; Maiti, A.; Halverson, D.; de Beer, S.; Walker, G. C. Hexagonal Boron Nitride Self-Launches Hyperbolic Phonon Polaritons, J Phys. Chem. Lett. 2017, 8, 2158-2162. 146. Alipour,E.; Halverson,D.; McWhirter, S.; Walker, G. C. Phospholipid Bilayers: Stability and Encapsulation of Nanoparticles, Ann. Rev. Phys. Chem, 2017, 68, 261-283.. 145. Li, H.; Walker, G. C. Twist and Shout: Single-Molecule Mechanochemistry ACS Nano, 2017, 11, 28-3.. 144. Gilburd, L.; Xu, X. G.; Bando,Y. Golberg, D.; Walker, G C. Surface Phonon Coupling within Boron Nitride Nanotubes Resolved by a Novel Near-Field Infrared Pump-Probe Imaging Technique, Microsc. Microanal.2016, 22, 366-367.. 143. Walker, G. C. ...
An important technique to increase the solubility and reactivity of carbon nanotube is through functionalization. In this study, the effects of functionalization of some single-walled carbon nanotubes (SWCNTs) were investigated with the aid of density functional theory. The SWCNT model used in the study consists of a finite, (5, 0) zigzag nanotube segment containing 60 C atoms with hydrogen atoms added to the dangling bonds of the perimeter carbons. There are three water-dispersible SWCNTs used in this study that were functionalized with (a) formic acid, as a model of carboxylic acid, (b) isophthalic acid, as a model aromatic dicarboxylic acid, and (c) benzenesulfonic acid, as a model aromatic sulfonic acid. Binding energies of the organic radicals to the nanotubes are calculated, as well as the HOMO-LUMO gaps and dipole moments of both nanotubes and functionalized nanotubes. Binding was found out to be thermodynamically favorable. The functionalization increases the electrical dipole moments and
Compound nanotubes can be produced in various ways: rolling up layered materials, coating pores in templates, or eliminating the core of a core-shell nanowire. In the case of ternary compound nanotubes, most of these methods have limitations. They may need layered materials or templates (e.g., porous alumina). Or the nanotubes produced may have an insufficiently small aspect ratio. Frequently the crystallinity of the nanotubes produced is poor - that is, they consist of many grains that have different crystallographic orientations. Scientists at the Max Planck Institute of Microstructure Physics in Halle, Germany, have devised a generic technique for generating nanotubes with very good crystallinity of a ternary compound (i.e., a compound that consists of three different chemical elements).. The scientists fabricated ultra-long single-crystalline ZnAl2O4 spinel nanotubes (total diameter: ~ 40 nm, wall thickness: ~10 nm). Spinels are ternary compounds of type AB2O4 that crystallise in a specific ...
The binding of block copolymer Pluronic F-127 in aqueous dispersions of single- (SWCNT) and multiwalled (MWCNT) carbon nanotubes has been studied by pulsed-field-gradient (PFG) 1H NMR spectroscopy. We show that a major fraction of polymers exist as a free species while a minor fraction is bound to the carbon nanotubes (CNT). The polymers exchange between these two states with residence times on the nanotube surface of 24 ± 5 ms for SWCNT and of 54 ± 11 ms for MWCNT. The CNT concentration in the solution was determined by improved thermal gravimetric analysis (TGA) indicating that the concentration of SWCNT dispersed by F-127 was significantly higher than that for MWCNT. For SWCNT, the area per adsorbed Pluronic F-127 molecule is estimated to be about 40 nm 2.. ...
Chemists at Rice University have identified a chemical process for cutting carbon nanotubes into short segments. The new process is said to yield nanotubes that are suitable for a variety of applications, including biomedical sensors small enough to migrate through cells without triggering immune reactions.. The chemical cutting process involves fluorinating the nanotubes, essentially attaching thousands of fluorine atoms to their sides, and then heating the fluoronanotubes to about 1,000 Celsius in an argon atmosphere. During the heating, the fluorine is driven off and the nanotubes are cut into segments ranging in length from 20-300 nanometers.. We have studied several forms of chemical scissors, including other fluorination methods and processes that involve ozonisation of nanotubes, said John Margrave, the E.D. Butcher Professor of Chemistry at Rice University. With most methods, we see a random distribution among the lengths of the cut tubes, but pyrolytic fluorination results in a ...
Single-walled carbon nanotubes (SWNTs), due to their novel structural, thermal, electrical, mechanical and optical properties, are expected to find applications in many fields. Pristine SWNTs are generally insoluble in common solvents, and difficult to functionalize controllably. We recently reported a non-wrapping approach to noncovalent engineering of carbon nanotube surfaces by short, rigid functional conjugated polymers, poly(aryleneethynylene)s (PPE). This method enables the superior control of the relative placement of functionalities on the nanotube surface while still preserving nearly all of the nanotubes intrinsic properties. We report here that the PPE-functionalized SWNTs can be solubilized in various organic solvents and water, and the solubilities are as high as 10 mg/ml. The soluble SWNTs with specific functionalities can be used as novel gelators that can gelate various organic solvents. In contrast to pristine SWNTs, soluble SWNTs can be homogeneously dispersed in commercial polymers
We study spatially isolated, individual gold nanorods placed at a planar interface between two dielectric media using confocal interference scattering microscopy in combination with higher order laser modes. Approaching refractive index matching conditions, we observe that the elastic scattering patterns of individual nanorods exhibit an exponential increase of both the scattering intensity and the signal-to-background ratio. In case refractive index matching conditions are fullfilled, the data acquisition rates are maximized and suitable for in-vivo biological measurements. In all cases, the characteristic two-lobe shape of the scattering patterns of single nanorods remains unchanged while the sign of the image contrast is a direct consequence of the refractive index variation occurring at the interface.. ©2008 Optical Society of America. Full Article , PDF Article ...
The adsorption of small gaseous molecules to the metal center in Pt-doped (5,5) single-walled carbon nanotubes has been explored within density functional theory. A model system consisting of a single Pt atom residing in the middle of a carbon nanotube with capping H atoms is used for our investigation. For all gases studied, the overall process of adsorption was found to be exothermic, where the affinity strongly depended on the orientation of the molecule. By examining the density of states and molecular orbitals of these nanotube-adsorbate complexes in comparison to the bare Pt-doped nanotube, we show that the electronic structure of these materials is strongly influenced by the presence of gases. Hence, we propose an application of Pt-doped single-walled carbon nanotubes as gas sensors and hope to motivate experimental work in this field.. ...
According to The Global Market for Carbon Nanotubes: Technologies, Production, End User Markets and Opportunities Analysis, 2015 - 2025 report once the most promising of all nanomaterials, carbon nanotubes (CNTs) face stiff competition in conductive applications from graphene and other 2D materials and in mechanically enhanced composites from nanocellulose. However, after considerable research efforts, real CNT products are hitting the market, and large-scale industrial production of single-walled carbon nanotubes (SWNTs) has been initiated, promising new market opportunities in transparent conductive films, transistors, sensors and memory devices. Li-ion battery additives and super capacitors are also potential high growth market opportunities.. The Global Market for Carbon Nanotubes: Technologies, Production, End User Markets and Opportunities Analysis, 2015-2025 report is 437 pages report available at ...
Methods of using performed nanotubes to make carbon nanotube films, layers, fabrics, ribbons, elements and articles are disclosed. To make various articles, certain embodiments provide a substrate (12). Performed nanotubes are applied to a surface of the substrate to create a non-woven fabric of carbon nanotubes. Portions of the non-woven fabric (54) are selectively removed according to a defined pattern to create the article. To make a nonfabxic, a substrate is provide. Prefromed nanotubea are applied to a surface of the substrate to create a non-woven fabric of carbon nanotubes wherein the non-woven fabric is substantially uniform density.
The National Institute of Standards and Technology (NIST) has demonstrated a novel chip-scale instrument made of carbon nanotubes that may simplify absolute measurements of laser power, especially the light signals transmitted by optical fibers in telecommunications networks.. The prototype device, a miniature version of an instrument called a cryogenic radiometer, is a silicon chip topped with circular mats of carbon nanotubes standing on end.* The mini-radiometer builds on NISTs previous work using nanotubes, the worlds darkest known substance, to make an ultraefficient, highly accurate optical power detector,** and advances NISTs ability to measure laser power delivered through fiber for calibration customers.***. This is our play for leadership in laser power measurements, project leader John Lehman says. This is arguably the coolest thing weve done with carbon nanotubes. Theyre not just black, but they also have the temperature properties needed to make components like electrical ...
A technique to deterministically manipulate individual Carbon Nanotubes (CNT) has been the brick-wall for the boom of CNT based devices. Here we demonstrate dielectrophoresis as an efficient technique to trap individual Single Walled Carbon Nanotubes (SWCNT) and Multi Walled Carbon Nanotubes (MWCNT). A coarse control on the number of nanotubes deposited was achieved by controlling the applied voltage and duration of deposition; additionally, a circuit that cuts off the electric field necessary for further CNT deposition after one single CNT deposition has been used. By using an external series resistance during dielectrophoresis, higher than the contact resistance of the carbon nanotube obtained after dielectrophoresis, we are able to limit the deposition to individual nanotubes. The contact resistance of a single SWCNT obtained by the coarse technique was found to be 80 MΩ. Hence we chose a limiting series resistance of 1 GΩ. P-type silicon substrate with resistivity of 0.1-0.5 Ωcm with ...
Highly ordered, free-standing titanium dioxide nanotube (TiNT) arrays have been of intense interest to the alternative energies field in recent years due to their barrier-free electron conduction pathway vs. TiO2 nanoparticles in dye-sensitized solar cell (DSSC) designs. TiNT arrays prepared by electrochemical anodization of Ti foils and combined with a transparent, Indium Tin Dioxide coated PET film are attractive candidates for efficient, flexible DSSCs. Flexible solar cells offer great benefits because of the potential for low-cost, roll-to-roll production and the increase in applications due to superior robustness. This approach utilizes a two-step anodization procedure coupled with implementation of a rapid inert gas dehydration and ultrasonic agitation detachment method. By controlling the reaction conditions during anodization (voltage, duration, concentration), TiNT arrays with specific morphology, lengths, and diameters can be tailored to satisfy a particular application such as
A detailed study of poly(alkylthiophene) self-assembly and organization on single-walled carbon nanotubes (SWNTs) is presented. Experimental evidence for self-assembly and organization of regioregular poly(3-hexyl thiophene) (rrP3HT) on single-walled carbon nanotubes was obtained using scanning tunneling microscopy (STM) and transmission electron microscopy (TEM). TEM images of drop-cast rrP3HT/SWNT composites displayed strong evidence that SWNTs were isolated from each other in a polymer matrix and coated with between 1-3 layers rrP3HT. STM measurements of adsorbed monolayers of rrP3HT on SWNT surfaces were compared to rrP3HT monolayer deposition on highly ordered pyrolytic graphite (HOPG) surfaces. The results show that average inter-lamellar distances of adsorbed polymer are greater for rrP3HT monolayers adsorbed onto the curved surfaces of SWNTs than on the flat surfaces of HOPG samples. Analysis of STM images yielded the chiral angles at which the thiophene polymer chains wrap around ...
Preferential destruction of metallic single-walled carbon nanotubes by laser irradiation. Self-organization of carbon nanotubes in evaporating droplets
... nanotubes[edit]. Main article: Boron nitride nanotube. Boron nitride tubules were first made in 1989 by Shore and ... Nanotubes of BN can be produced that have a structure similar to that of carbon nanotubes, i.e. graphene (or BN) sheets rolled ... However, the properties of BN nanotubes are very different: whereas carbon nanotubes can be metallic or semiconducting ... "Transformation of BxCyNz Nanotubes to Pure BN Nanotubes" (PDF). Applied Physics Letters. 81 (6): 1110. Bibcode:2002ApPhL.. ...
Elastic nanotubes[edit]. Further information: Carbon nanotube. Elastic nanotubes are a promising artificial muscle technology ... The absence of defects in carbon nanotubes enables these filaments to deform elastically by several percent, with energy ... storage levels of perhaps 10 J/cm3 for metal nanotubes. Human biceps could be replaced with an 8 mm diameter wire of this ...
Immobilizing hydrogenase on carbon nanotubes[edit]. Carbon nanotubes can also be used for a support for hydrogenase on the ... Another way of coupling hydrogenase to the nanotubes was to covalently bind them to avoid a time delay. Hydrogenase isolated ... A slight drawback to this method is that the ratio of hydrogenase covering the surface of the nanotube network leaves ... including the use of carbon nanotubes to immobilize enzymes directly.[2] Other research has gone into exploiting some of the ...
Nanotube slicing[edit]. Graphene can be created by cutting open carbon nanotubes.[86] In one such method multi-walled carbon ... In 2014, carbon nanotube-reinforced graphene was made via spin coating and annealing functionalized carbon nanotubes. The ... Brumfiel, G. (2009). "Nanotubes cut to ribbons New techniques open up carbon tubes to create ribbons". Nature. doi:10.1038/news ... Smith, B. W.; Luzzi, D. E. (2001). "Electron irradiation effects in single wall carbon nanotubes". Journal of Applied Physics. ...
Delivery from compartmented nanotubes[edit]. Nano tubes are also used for carrying drugs in general therapy and in tumor ... Compartmented drug release systems were prepared based on nanotubes or nanofibres. Nanotubes and nanofibres, for instance, ... Bio-hybrid polymer nanotubes by wetting[edit]. Electro spinning, co-electrospinning, and the template methods based on ... Nanotubes prepared with a responsive polymer attached to the tube opening allow the control of access to and release from the ...
She has focussed on ink-jet printed two-dimensional materials as well as nanotubes for sensors, photodetectors and solar cells ... "Nanotubes". Casiraghi [email protected]: Nanoscience and Spectroscopy Lab. Retrieved 2019-10-17. "Inkjet-printed graphene ... for work concerning formation of graphene and carbon nanotubes. She moved to the University of Manchester in 2010, and was ...
Anatase can be converted into inorganic nanotubes and nanowires.[64] Hollow TiO2 nanofibers can be also prepared by coating ... Nanotubes of titanium dioxide (TiO2-Nt) obtained by electrochemical synthesis. The SEM image shows an array of vertical self- ... Mogilevsky, Gregory; Chen, Qiang; Kleinhammes, Alfred; Wu, Yue (2008). "The structure of multilayered titania nanotubes based ...
Reich focusses on one dimensional nanostructures, including graphene, semiconductor nanowires and carbon nanotubes. 2007 ... Carbon Nanotubes. Wiley. doi:10.1002/9783527618040. ISBN 978-3-527-40386-8. Thomsen, C.; Reich, S. (2000-12-11). "Double ...
"Smart Nanotubes". SMELL Inspector. Retrieved 2021-03-31. Robertson, Adi (2017-01-03). "The NeOse smell recorder could help your ... The Smell Inspector by Smart Nanotubes Technologies is in pre-order stage of production, with deliveries estimated at December ...
Research now shows that carbon nanotubes can be derived from plant fibers, suggesting how the nanotubes were formed in the ... Some experts expect to discover such nanotubes in more relics as they are analyzed more closely. Wootz was also mentioned to ... A research team in Germany published a report in 2006 revealing nanowires and carbon nanotubes in a blade forged from Damascus ... Reibold, M.; Paufler, P.; Levin, A. A.; Kochmann, W.; Pätzke, N.; Meyer, D. C. (2006). "Materials: Carbon nanotubes in an ...
Kochaev, A. (October 11, 2017). "Elastic properties of noncarbon nanotubes as compared to carbon nanotubes". Physical Review B ... For example, boron nanotubes have a higher 2D Young's modulus than any other known carbon and noncarbon nanostructures. ... Tang, Hui & Ismail-Beigi, Sohrab (2007). "Novel Precursors for Boron Nanotubes: The Competition of Two-Center and Three-Center ... Kunstmann, Jens; Quandt, Alexander (July 12, 2006). "Broad boron sheets and boron nanotubes: An ab initio study of structural, ...
Beck, Mihály T.; Mándi, Géza (1997). "Solubility of C60". Fullerenes, Nanotubes and Carbon Nanostructures. 5 (2): 291-310. doi: ... Dresselhaus, M. S.; Dresselhaus, G.; Eklund, P. C. (1996). Science of fullerenes and carbon nanotubes. San Diego, CA: Academic ... M. S. Dresselhaus; G. Dresselhaus; P. C. Eklund (20 February 1996). Science of fullerenes and carbon nanotubes. Academic Press ...
talk , contribs)‎ (→‎Nanotubes). *(diff , hist) . . Titanium dioxide‎; 08:17 . . (+47)‎ . . ‎. Ayanwiki. (talk , contribs)‎ (→‎ ... talk , contribs)‎ (→‎Nanotubes). 12 December 2017. *(diff , hist) . . Sulfur dioxide‎; 22:20 . . (-13)‎ . . ‎. 209.232.116.88. ... talk , contribs)‎ (→‎Nanotubes). *(diff , hist) . . Titanium dioxide‎; 08:28 . . (+248)‎ . . ‎. Ayanwiki. ( ... Nanotubes). *(diff , hist) . . Titanium dioxide‎; 08:11 . . (+1,478)‎ . . ‎. Ayanwiki. ( ...
Carbon nanotube field-effect transistor. *Cybermethodology. *Fourth-generation optical discs *3D optical data storage ...
Klaus D. Sattler (1 May 2010). Nanotubes and Nanowires. CRC Press. pp. 13-. ISBN 978-1-4200-7542-7. Retrieved 10 March 2012. ...
Collins, Philip G.; Avouris, Phaedon (December 2000). "Nanotubes for Electronics". Scientific American. 283 (6): 62-69. Bibcode ...
She started to work on graphene and carbon-nanotubes, and eventually led the Graphene-Nanotube Research Group. In 1996 Loiseau ... "Graphene, carbon nanotubes, microstructure research … Spotlight on an eminent French scientist, Annick Loiseau". www.onera.fr ( ... In 1992 she became interested in carbon nanotubes, which had recently been discovered by Sumio Iijima. ... "Understanding Carbon Nanotubes". Lecture Notes in Physics. 677. Bibcode:2006LNP...677.....L. doi:10.1007/b10971390. ISBN 978-3- ...
Golberg, D.; Bando, Y.; Tang, C. C.; Zhi, C. Y. (2007-09-17). "Boron Nitride Nanotubes". Advanced Materials. Wiley. 19 (18): ... The world smallest thermometer based on a single-wall carbon nanotube. Giant electrostrain effect. Warm spraying - an efficient ... Growth and characterization of boron nitride nanotubes. Superconducting and organic materials. Functional ceramics, such as ...
... bundles of single-walled nanotubes, bundles of multi-walled nanotubes, and carbon nanotube-polymer mixtures. It has been shown ... Carbon nanotube sensors can be made more selective by using a polymer as a barrier, doping the nanotubes with heteroatoms, or ... Carbon nanotubes are useful sensing materials because they have low detection limits, and quick response times; however, bare ... The first published report of nanotubes being used as chemiresistors was made in 2000. Since then there has been research into ...
1999) detected the effect in carbon nanotubes; for a discussion, see Kong et al. (2004). The magnetic Aharonov-Bohm effect is ... Kong, J; Kouwenhoven, L; Dekker, C (2004). "Quantum change for nanotubes". Physics World. Retrieved 2009-08-17. van Oudenaarden ... "Aharonov-Bohm oscillations in carbon nanotubes". Nature. 397 (6721): 673. Bibcode:1999Natur.397..673B. doi:10.1038/17755. ...
These DNA nanotubes are somewhat similar in size and shape to carbon nanotubes, and while they lack the electrical conductance ... DNA nanotubes are more easily modified and connected to other structures. One of many schemes for constructing DNA nanotubes ... DNA nanotubes: Yin, P.; Hariadi, R. F.; Sahu, S.; Choi, H. M. T.; Park, S. H.; Labean, T. H.; Reif, J. H. (8 August 2008). " ... Carbon nanotubes have been hosted on DNA arrays in a pattern allowing the assembly to act as a molecular electronic device, a ...
"Multi-Walled Carbon Nanotubes; Significant New Use Rule (40 CFR 721.10155)". Federal Register, Volume 76 Issue 88. U.S. ... "Safe Handling and Use of Carbon Nanotubes" (PDF). Safe Work Australia. March 2012. pp. 25-31. Archived from the original (PDF) ... The NIOSH Manual of Analytical Methods includes guidance on electron microscopy of filter samples of carbon nanotubes and ... "Current Intelligence Bulletin 65: Occupational Exposure to Carbon Nanotubes and Nanofibers". U.S. National Institute for ...
Functionalisation of carbon nanotubes. Information sourced from Biography in Chemical Reviews[permanent dead link] "Officer ...
"Recent Advances in Carbon Nanotube Photo-physics" (PDF). Archived from the original (PDF) on July 2, 2006. Cite journal ... M. S. Dresselhaus, G. Dresselhaus and A. Jorio (2004). "Unusual Properties and Structures of Carbon Nanotubes" (PDF). Annual ... M. S. Dresselhaus; G. Dresselhaus; R. Saito; A. Jorio (2005). "Raman Spectroscopy of Carbon Nanotubes" (PDF). Physics Reports. ... M. S. Dresselhaus, R. Saito and A. Jorio (2004). "Semiconducting Carbon Nanotubes" (PDF). Proceedings of ICPS-27. Archived from ...
doi:10.1016/S0009-2509(97)00166-8. Harris, Peter J. F. (2009). "Catalytically produced carbon nanotubes". Carbon Nanotube ... Allotropes of carbon Graphite Carbon nanotube "Filamentous Carbon". IUPAC Compendium of Chemical Terminology. 2009. doi:10.1351 ... including carbon nanotubes, carbon nanofibers, and microcoils. It forms from gaseous carbon compounds. Filamentous carbon ...
He has also discovered that liquid flow in a singled walled carbon nanotube induces the voltage and current to flow along the ... Sood is now working on the modalities of enhancing the viscosity of a material by adding nanotubes without increasing its ... Ajay K. Sood, Anindya Das and Shankar Ghosh (2005). Vibration Sensor based on Nanotubes. Patent application. 664/CHE/2005and US ... Sood, through his experiments in 2003, generated electrical signals by passing liquids over solids or through nanotubes and ...
"Multi-Walled Carbon Nanotubes; Significant New Use Rule (40 CFR 721.10155)". Federal Register, Volume 76 Issue 88. U.S. ...
Nanotubes formed from dipeptides are stable under extreme conditions. Dry nanotubes do not degrade until 200 °C; nanotubes ... Nanotubes formed from dipeptides are the widest amongst peptide nanotubes. An example of a dipeptide that has been studied is ... Nanotube's exceptional mechanical strength and stability makes them excellent materials for application in this area. Nanotubes ... Although they are less stiff then carbon and inorganic nanotubes, with these values these nanotubes are amongst some of the ...
... functionalisation of carbon nanotubes; and quantum dots for biomedical applications. The research focuses on the synthesis and ...
... multiwalled carbon nanotubes that reach about 2 mm in length, which is an order of magnitude longer than that described in most ... Carbon nanotubes1 can now be produced in large quantities by either arc methods2,3 or thermal decomposition of hydrocarbons4,5 ... Figure 2: Scanning and transmission electron microscope images of nanotubes after 48 hours of growth.. ... Figure 1: Low-magnification scanning electron microscope images of aligned carbon nanotube arrays.. ...
... higher-quality nanotubes. Such manufacturing improvements likely would make the nanotubes more attractive for use in automotive ... But its far harder to imagine getting a precise cut on a carbon nanotube, with a diameter 1/50,000th the thickness of a human ... The jumbled bundle of nanotubes is then blasted by high-intensity sound waves that create cavities (or partial vacuums) in the ... The group also learned that cutting single-walled carbon nanotubes using sound waves in water creates multiple kinks, or bent ...
See additional applications in: Optical properties of carbon nanotubes. *Carbon nanotube photoluminescence (fluorescence) can ... Carbon nanotubes (CNTs) are cylinders of one or more layers of graphene (lattice). Diameters of single-walled carbon nanotubes ... Nanotube-based transistors, also known as carbon nanotube field-effect transistors (CNTFETs), have been made that operate at ... "Super-nanotubes: remarkable spray-on coating combines carbon nanotubes with ceramic". KurzweilAI.. ...
Featured in carbon nanotubes. By Kendra Pierre-Louis Aug 25, 2017 Science ... Carbon Nanotubes Usher Molecules In And Out Of Cell Membranes. Success in the long-sought effort to make artificial pores ... Carbon Nanotubes Cant Handle a Space Elevator. According to new research, one flat could ruin the whole thing. Bummer. ... Carbon Nanotubes Transport Molecules In And Out Of Cell Membranes. Making membranes more porous and more like natural cells ...
CNTs Carbon nanotubes (CNTs) are hollow cylindrical graphite structures with usually closed ends made of one (single-walled) or ... Qian D, Wagner GJ, Liu WK, Yu MF, Ruoff RS (2002) Mechanics of carbon nanotubes. Appl Mech Rev 55:495-533CrossRefGoogle Scholar ... Hernandez E, Goze C, Bernier P, Rubio A (1998) Elastic properties of C and BxCyNz composite nanotubes. Phys Rev Lett 80:4502- ... Carbon nanotubes (CNTs) are hollow cylindrical graphite structures with usually closed ends made of one (single-walled) or more ...
Carbon nanotubes scaling up to surpass single-story silicon. Team behind the first carbon nanotube computer now leading efforts ... scientists can cause forests of carbon nanotubes to grow on its surface. These carbon nanotubes absorb light and can help ... Building a multilayered chip -- carbon nanotube transistors and memory devices stacked on top of each other like the floors of ... 1059020, II-NEW: Robust Carbon Nanotube Technology for Energy-Efficient Computing Systems: A Processing and Design ...
Tubes of boron could have many of the same properties as carbon nanotubes, and for some electrical applications, they may even ... Boron nanotubes will have a more complicated shape than the simple linked hexagons that work for carbon, as the chemistry of ... The first boron nanotubes to be created, in 2004, are thought to be formed from a buckled triangular latticework. ... Metallic boron nanotubes would still be useful, however, as they should be better conductors than carbon. Ismail-Beigi ...
2001). "Engineering Carbon Nanotubes and Nanotube Circuits Using Electrical Breakdown". Science. 292 (5517): 706-709. Bibcode: ... Figure 2.2: Motion of shorter nanotubes (red) along the longer tubes (yellow) from the hotter(top) section of the nanotube to ... A device generating linear or rotational motion using carbon nanotube(s) as the primary component, is termed a nanotube ... In the case of nanotube nanomotors however, the intershell friction in the multi-walled nanotubes (MWNT) is remarkably small. ...
Carbon nanotubes--those minute cylinders of carbon poised to revolutionize the fields of materials science and electronics-- ... Smaller than strands of DNA, carbon nanotubes were first described in the early 1990s. Since then they have captured the ... Still, researchers are just beginning to understand and exploit nanotubes, so exactly how useful they might be remains to be ... scientists have discovered the smallest stable carbon nanotubes known. Teams led by Lu-Chang Qin of the NEC Corporation in ...
Single-wall carbon nanotubes are a family of chemical species comprised entirely of a rolled up single layer hexagonal lattice ... liquid phase dispersion and processing though hinge on controlling the properties of the interfacial layer between the nanotube ... on utilizing the capabilities of sedimentation velocity methods for the characterization of single-wall carbon nanotubes ( ...
Researchers at Stanford University have used electrodes made of bundles of multiwalled carbon nanotubes to stimulate rat ... Nanotubes Trigger Neurons. Using carbon nanotubes as small electrodes might one day lead to safe and effective retinal implants ... With the smaller carbon nanotube electrodes, Auciello says, "You can address much lower number of cells with one electrode, ... Researchers at Stanford University have used electrodes made of bundles of multiwalled carbon nanotubes to stimulate rat ...
Some Nanotubes Could Cause Cancer. New studies suggest that long carbon nanotubes behave like asbestos. ... Complex Integrated Circuits Made of Carbon Nanotubes. New circuits bring low-power nanotube computers closer. ... How to Build a Nanotube Computer. IBM creates a new way to make faster and smaller transistors. ... Materials made from nanotubes could lead to conformable computers that stretch around any shape. ...
an introduction to the symmetry of nanotubes. - textbook models of nanotubes as narrow cylinders. - a combination of ab-initio ... Carbon nanotubes are chemically stable, mechanically very strong, and conduct electricity. For this reason, they open up new ... Carbon nanotubes are exceptionally interesting from a fundamental research point of view. Many concepts of one-dimensional ... Wiley-VCH, Berlin Carbon Nanotubes This text is an introduction to the physical concepts needed for investigating carbon ...
MIT Develops New Method of Generating Power With Carbon Nanotubes June 9, 2021 at 10:01 am By grinding up nanotubes and dipping ... How Carbon Nanotubes Can Modify Plant DNA March 12, 2019 at 11:44 am DNA is thin enough to pass through plant cell walls, but ... Nanotubes rear their tiny heads again, this time as a stamp for electronic inks December 8, 2016 at 1:16 pm MIT researchers ... New carbon nanotube breakthrough moves them one step closer to mass production September 8, 2016 at 4:08 pm A new method for ...
FastCAPs CNTs are grown and delivered on a substrate, with every nanotube pointing directly off the surface. Vertical ... FastCAP has gained substantial experience developing Carbon Nanotubes (CNTs) for extreme environment ultracapacitors. CNTs have ... FastCAPs Vertically Aligned Carbon Nanotubes (VA-CNTs) are now available for sale at http://www.fastcapsystems.com. ...
Results from recent animal studies indicate that carbon nanotubes (CNT) and carbon nanofibers (CNF) may pose a respiratory ... There is no single type of carbon nanotube or nanofiber; one type can differ from another in shape, size, chemical composition ... Current Intelligence Bulletin 65: Occupational Exposure to Carbon Nanotubes and Nanofiberspdf icon [PDF - 3.41 MB] ... Results from recent animal studies indicate that carbon nanotubes (CNT) and carbon nanofibers (CNF) may pose a respiratory ...
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Because of differences in the way the familiar chicken-wire patterns of carbon atoms line up across the surface, nanotubes can ... Extraordinary strength and lightness of woven nanotube sheets may find use in high-end applications such as military aircraft ... Carbon nanotubes have a measured strength about 50 times that of carbon steel. ... Carbon Nanotube Super-Fabric. Carbon nanotubes have a measured strength about 50 times that of carbon steel. Because of ...
But while these techniques can separate nanotubes from one another, they take a toll on the nanotubes electronic, thermal and ... That nanotubes stay suspended for a long time should catch the eye of manufacturers who use them in bulk. "They should stay ... Keeping carbon nanotubes from clumping in aqueous solutions and combining them with molecules that add novel abilities have ... "We started to wonder what would happen if we modified the metal complex so it could bind to a nanotube," Marti said. "That ...
... architectural research firm Decker Yeadon is researching how carbon nanotubes might create building materials that move without ... a compound made out of carbon nanotubes, deionized water, and a chemical surfactant that helps nanotubes disperse in water. The ... carbon nanotube. 1 of 1 File this in the creepy yet useful category: architectural research firm Decker Yeadonis currently ... Carbon nanotubes are a cutting-edge component used in the fields of electronics, medicine and industrial design due to their ...
Based on nanotubes, nanowires and graphene, their common factor is compatibility with todays production techniques ... 9nm carbon nanotube transistor diagram. IBM says that silicon transistors will run out of steam some time in the next 10 years ... Carbon nanotube transistors (CNTs) could work well at such sizes, such as the 9nm CNT shown here. Outperforming the best ... Slides (c) and (d) show further details of the nanotube, showing that its correctly aligned and sitting on top of the HfO2 ...
One of the leading candidates to replace silicon CMOS transistors is carbon nanotubes. But there are still lots of issues with ... One of the leading candidates to replace silicon CMOS transistors is carbon nanotubes. But there are still lots of issues with ... and one of the leading candidates to replace them is a device called a carbon nanotube (CNT). ...
A small amount of the neat nanotube solution (∼0.05 mL, cC8S3 = 3 × 10−4 mol⋅L−1) was abruptly added to the stirring water/ ... Robust excitons inhabit soft supramolecular nanotubes. Dörthe M. Eisele, Dylan H. Arias, Xiaofeng Fu, Erik A. Bloemsma, Colby P ... To a 400-μL nanotube solution was added 11 μL of 10 mM AgNO3 solution. Absorption spectra were taken within 90 min of adding ... 2014) Direct measurement of energy migration in supramolecular carbocyanine dye nanotubes. J Phys Chem Lett 5(13):2274-2282. ...
Now researchers there have that spinning carbon nanotubes (CNTs) into longer fibres could mean ultra-lightweight mobile phone ... The University of Cincinnati has long been known for its world-record-breaking carbon nanotubes. ... Carbon nanotubes to slim mobile phones. Carbon nanotubes to slim mobile phones. By Mark Harris 2009-03-11T18:06:00.69Z. Mobile ... Carbon nanotube threads work well as an antenna because of something called the skin effect: electrons transfer well on the ...
Carbon nanotubes--tiny strawlike cylinders of pure carbon--have interesting electrical properties. Indeed, they have already ... To make the altered nanotubes, Dirk M. Guldi of the University of Notre Dame and his colleagues attached molecules of ferrocene ... And it didnt take much: the researchers added just one ferrocene group for every 100 carbon atoms in the nanotubes. The ... The scientists determined that when they exposed their altered nanotubes to light in the visible range, carbon atoms in the ...
A carbon nanotube is a microscopic pipe made of carbon, about 1/10,000th the diameter of a human hair - that is one billionth ... But NRam (Nanotube-based/Nonvolatile Ram) could eventually replace all three.. It is faster than SRam, it should be cheap and ... Carbon nanotube memory could be a panacea to all existing memory issues, said Nantero, because it is cheap and does not lose ... The nanotube does actually have moving parts but these move on the atomic scale. The pipes are fabricated as ribbons, hang from ...
Eat Nanotubes, Shit Kevlar. 4 years ago. Spiders Ingest Nanotubes, Then Weave Silk Reinforced with Carbon. The team then used a ... In other words, giving spiders water that is infused with carbon nanotubes makes them weave silk stronger than any known fiber. ... They simply sprayed the spiders with water containing the nanotubes or flakes and then measured the mechanical properties of ... neat trick to introduce carbon nanotubes and graphene flakes into the spider silk. ...
Nanowires and Carbon Nanotubes - Nanowires are wires with a very small diameter, and can be used to build tiny transistors for ... Carbon nanotube properties depend on how you roll the sheet. In other words, even though all carbon nanotubes are made of ... A carbon nanotube is a nano-size cylinder of carbon atoms. Imagine a sheet of carbon atoms, which would look like a sheet of ... Carbon nanotubes can also be effective semiconductors with the right arrangement of atoms. Scientists are still working on ...
The carbon nanotubes expand the range of light wavelengths that activate a plants photosynthetic systems. Even at their most ... Nanotubes coated in single-stranded DNA slipped right through the chloroplast membranes of *Arabidopsis thaliana, *a type of ... Next, the team wanted to see how the nanotubes affect photosynthesis. To do this, they used a dye that changes color when it ... Lastly, the team showed that carbon nanotubes are capable of detecting nitric oxide in the environment, expanding the range of ...
Because of differences in the way the familiar chicken-wire patterns of carbon atoms line up across the surface, nanotubes can ... Extraordinary strength and lightness of woven nanotube sheets may find use in high-end applications such as military aircraft ... Carbon nanotubes have a measured strength about 50 times that of carbon steel. ... A thin ribbon of aerogel unspools across the top of the carpet of nanotubes. Where the aerogel and the nanotubes meet, tubes ...
  • NIOSH published a Federal Register Notice on April 8, 2009, requesting information on carbon nanotubes (CNTs) including single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). (cdc.gov)
  • Carbon nanotubes (CNTs) are cylinders of one or more layers of graphene (lattice). (wikipedia.org)
  • Carbon nanotubes (CNTs) are hollow cylindrical graphite structures with usually closed ends made of one (single-walled) or more (multiwalled) concentric cylindrical layers. (springer.com)
  • FastCAP's Vertically Aligned Carbon Nanotubes (VA-CNTs) are now available for sale at http://www.fastcapsystems.com . (prweb.com)
  • FastCAP has gained substantial experience developing Carbon Nanotubes (CNTs) for extreme environment ultracapacitors. (prweb.com)
  • FastCAP's CNTs are grown and delivered on a substrate, with every nanotube pointing directly off the surface. (prweb.com)
  • Carbon nanotube transistors (CNTs) could work well at such sizes, such as the 9nm CNT shown here. (zdnet.com)
  • Carbon nanotubes (CNTs) hold promise as the next material for the next generation of computers. (ibm.com)
  • Here is the shorter segment related to the finding of carbon nanotubes (CNTs). (911blogger.com)
  • Current issues with this method are that the CNTs are usually produced as mixtures of nanotubes with various diameters and different sidewall structures. (eurekalert.org)
  • This chapter introduces the background knowledge of carbon nanotubes (CNTs), including the history of discovery and commonly synthesized techniques. (oreilly.com)
  • Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. (news-medical.net)
  • This book provides a detailed introduction to carbon nanotubes (CNTs) for targeted drug delivery. (springer.com)
  • An impressive current example is carbon nanotubes (CNTs) - single sheets of carbon atoms rolled into a cylinder. (eurekalert.org)
  • Engineers at Stanford University have created a small computer using transistors built with carbon nanotubes (CNTs) rather than silicone. (campustechnology.com)
  • Carbon nanotubes (CNTs) are very prevalent in today's world of medical research and are being highly researched in the fields of efficient drug delivery and biosensing methods for disease treatment and health monitoring. (wikipedia.org)
  • Carbon nanotubes (CNTs) can be thought of as single atomic layer graphite sheets rolled up to form seamless cylinders. (wikipedia.org)
  • Electron transport can go over long nanotube lengths, 1 μm, enabling CNTs to carry very high currents (i.e. up to a current density of 109 A∙cm−2) with essentially no heating due to nearly one dimensional electronic structure. (wikipedia.org)
  • Thanks to the measured properties of individual carbon nanotubes (CNTs), such material has been proposed as future material for interconnects. (wikipedia.org)
  • In other words, giving spiders water that is infused with carbon nanotubes makes them weave silk stronger than any known fiber. (jwz.org)
  • Spiders have woven webs infused with carbon nanotubes and even graphene, raising the prospect of new materials with record-beating properties. (newscientist.com)
  • With continued support from the National Science Foundation (NSF), and in collaboration with IBM and other industry leaders, the researchers are now making carbon nanotube transistors that rival conventional silicon. (nsf.gov)
  • Building a multilayered chip -- carbon nanotube transistors and memory devices stacked on top of each other like the floors of a high rise -- is the Holy Grail for the team. (nsf.gov)
  • With support from NSF, a team of Stanford University engineers has for the first time built a tiny computer with 178 transistors made from carbon nanotubes, a semiconductor material that may replace silicon in computer chips. (nsf.gov)
  • If so, then boron tubes might be used in nanodevices similar to the diodes and transistors that have already been made from carbon nanotubes, says Ni. (newscientist.com)
  • One of the leading candidates to replace silicon CMOS transistors is carbon nanotubes. (zdnet.com)
  • But silicon transistors won't last forever, and one of the leading candidates to replace them is a device called a carbon nanotube (CNT). (zdnet.com)
  • Scientists are still working on finding ways to make carbon nanotubes a realistic option for transistors in microprocessors and other electronics. (howstuffworks.com)
  • Quantum supercurrent transistors in carbon nanotubes. (nih.gov)
  • The carbon nanotubes not only carry current at higher speeds than silicon transistors, but also detect electrical changes with a greater degree of precision than silicon, allowing the nanotube to function as a highly responsive sensor. (computerweekly.com)
  • The team used single-walled carbon nanotubes, which they configured to act as field-effect transistors (FETs). (fastcompany.com)
  • Making carbon nanotube transistors that are better than silicon transistors is a big milestone," he said in the press release. (csmonitor.com)
  • The news has prompted speculation that carbon nanotube transistors might one day replace traditional transistors, according to Tech.com. (csmonitor.com)
  • Carbon nanotube transistors could form the basis of faster processing and more efficient wireless communication between devices, all with lower energy costs and longer battery life. (csmonitor.com)
  • Now researchers have combined a carbon nanotube mesh with a spongy ionic polymer to build super-stretchy transistors . (slashdot.org)
  • Length scaling of carbon nanotube transistors. (nih.gov)
  • Carbon nanotube field-effect transistors are strong candidates in replacing or supplementing silicon technology. (nih.gov)
  • Although theoretical studies have projected that nanotube transistors will perform well at nanoscale device dimensions, most experimental studies have been carried out on devices that are about ten times larger than current silicon transistors. (nih.gov)
  • Here, we show that nanotube transistors maintain their performance as their channel length is scaled from 3 µm to 15 nm, with an absence of so-called short-channel effects. (nih.gov)
  • Researchers at Brown University and in Korea have described the dynamics behind cutting single-walled carbon nanotubes, cylindrical structures just 1/50,000th the width of a human hair. (redorbit.com)
  • In a paper published this month in the British journal Proceedings of the Royal Society A, researchers at Brown University and in Korea document for the first time how single-walled carbon nanotubes are cut, a finding that could lead to producing more precise, higher-quality nanotubes. (redorbit.com)
  • It's a surprise to other researchers, who expected all boron nanotubes to be metallic. (newscientist.com)
  • Still, researchers are just beginning to understand and exploit nanotubes, so exactly how useful they might be remains to be seen. (scientificamerican.com)
  • Researchers at Stanford University have used electrodes made of bundles of multiwalled carbon nanotubes to stimulate rat neurons. (technologyreview.com)
  • And it didn't take much: the researchers added just one ferrocene group for every 100 carbon atoms in the nanotubes. (scientificamerican.com)
  • ARMONK, N.Y. -- International Business Machines Corp. researchers say they have found proof that exotic structures called carbon nanotubes have the potential to outperform silicon in future integrated circuits. (wsj.com)
  • So IBM researchers brought their scanning probe thermometer, their air spacer for a 10 nanometer chip, their 7 nm chip, and not to be out-done by silicon, they brought their carbon nanotubes, too. (ibm.com)
  • Using a new method for precisely controlling the deposition of carbon, researchers have demonstrated a technique for connecting multi-walled carbon nanotubes to the metallic pads of integrated circuits without the high interface resistance produced by traditional fabrication techniques. (ecnmag.com)
  • Using this three-dimensional fabrication technique, researchers at the Georgia Institute of Technology developed graphitic nanojoints on both ends of the multi-walled carbon nanotubes, which yielded a 10-fold decrease in resistivity in its connection to metal junctions. (ecnmag.com)
  • The researchers believe the technique could also be used to connect multi-layered graphene to metal contacts, though their published research has so far focused on carbon nanotubes. (ecnmag.com)
  • Researchers have envisioned a future generation of hybrid devices based on traditional integrated circuits but using interconnects based on carbon nanotubes. (ecnmag.com)
  • Researchers at Los Alamos and partners in France and Germany are exploring the enhanced potential of carbon nanotubes as single-photon emitters for quantum information processing. (nextbigfuture.com)
  • However, a team of researchers at the Massachusetts Institute of Technology have done just that - creating carbon nanotubes with the help of common household materials. (naturalnews.com)
  • It recently provided a big federal grant to Rice researchers, who would come up with an efficient yet inexpensive way to turn methane gas into carbon nanotubes. (naturalnews.com)
  • Natural News) Carbon nanotubes, which have long been placed at the top rung of useful materials in the manufacturing industry, were found out to be as harmful as asbestos, for they have the ability to also increase the risk of cancer for people who are exposed to them, Edinburgh researchers said. (naturalnews.com)
  • The researchers first made multiwalled carbon nanotubes between 40 and 200 nanometers in diameter and up to 30 microns long. (eurekalert.org)
  • Ultimately the researchers discovered vacuum annealing nanotubes at 500 degrees Celsius (932 Fahrenheit) reduced contamination enough to measure resistance accurately. (eurekalert.org)
  • The researchers have shown that individual carbon nanotubes can act as a separation channel that would force two differing molecules to separate as easily as oil and water. (drexel.edu)
  • Carbon nanotubes, the experimental materials seen as possible replacements for conventional chip-making materials, conduct electricity better than any other material at room temperature, according to researchers at the University of Maryland. (computerweekly.com)
  • The mobility of carbon nanotubes is about 70 times higher than that of silicon used to manufacture processors and 25% higher than any other known semiconductor material, the researchers said in a report published in online scientific journal Nano Letters. (computerweekly.com)
  • Researchers at Worcester Polytechnic Institute have developed a chip made of carbon nanotubes that can capture circulating tumor cells of all sizes and types, and can do so with far greater sensitivity than existing technologies. (news-medical.net)
  • In a paper published in NANO, a group of researchers have developed a simple flame burning method to prepare single-walled carbon nanotube (SWNT) sponges on a large scale. (news-medical.net)
  • Rice University researchers have invented a device that uses fast-moving fluids to insert flexible, conductive carbon nanotube fibers into the brain, where they can help record the actions of neurons. (news-medical.net)
  • This is the latest in a string of devices that can be made with nanotubes, and according to the researchers, is the next step towards replacing silicon in a variety of electronic applications. (theregister.co.uk)
  • City of Hope researchers hope to boost the brain's own immune response against tumors by delivering cancer-fighting agents via nanotubes. (nasa.gov)
  • City of Hope researchers, who began their quest in 2006, found good results: The nanotubes, which they used on mice, were non-toxic in brain cells, did not change cell reproduction and were capable of carrying DNA and siRNA, two types of molecules that encode genetic information. (nasa.gov)
  • Duke University researchers have found a way to make especially long, well-aligned carbon nanotubes. (trnmag.com)
  • The researchers' method produces nanotubes as long as two millimeters, which is 100 times longer than previous efforts, according to the researchers. (trnmag.com)
  • The researchers also reoriented the gas flow to make cross-connecting grids of nanotubes. (trnmag.com)
  • As the researchers report in their paper in the November 29, 2007 online edition of Nano Letters (" DNA Damage Induced by Multi-walled Carbon Nanotubes in Mouse Embryonic Stem Cells "), the DNA damage induced by MWCNTs was indicated by Western blot analysis of 8-oxoguanine-DNA glycosylase 1 (OGG1) and by the induction of two key double-strand break repair proteins, Rad 51 and XRCC4. (medgadget.com)
  • Using an approach they are calling "plant nanobinics," researchers from Massachusetts Institute of Technology (MIT) have embedded carbon nanotubes in spinach that enables the leafy plant to sense explosives and also transmit the information to a handheld device wirelessly. (ibtimes.com)
  • There has been a lot of hype about carbon nanotubes that hasn't been realized, and that has kind of soured many people's outlook," Michael Arnold, one of the lead researchers for the study, said in a press release. (csmonitor.com)
  • Researchers found that by eliminating contaminated nanotubes they were able to create a transistor with an equivalent charge density 1.9 times higher than that of traditional silicon. (csmonitor.com)
  • Although chemical reactions on the surfaces of nanotubes tend to kill their already limited natural fluorescence, the researchers said the new process actually enhances the intensity and even shifts the wavelength. (photonics.com)
  • So the nanotube becomes an antenna that absorbs light and funnels the energy to the doping site, according to the researchers. (photonics.com)
  • Researchers at the Institute of Life Sciences began experimenting with BNNTs to see if the nanotubes could make the treatment more effective. (scienceblog.com)
  • Technology researchers say these nanotubes have energy applications, medical applications and aerospace applications," said Jordan. (scienceblog.com)
  • Researchers at NASA's Langley Research Center, the Department of Energy's Thomas Jefferson National Accelerator Facility and the National Institute of Aerospace created a new technique to synthesize high-quality boron-nitride nanotubes (BNNTs). (scienceblog.com)
  • University of Pittsburgh researchers have developed a natural, nontoxic method for biodegrading carbon nanotubes, a finding that could help diminish the environmental and health concerns that mar the otherwise bright prospects of the superstrong materials commonly used in products from electronics to plastics. (photonics.com)
  • Using a process called chemical vapor deposition, the researchers created a structure akin to a honeycomb consisting of millions of densely packed carbo nanotubes with openings on both sides of a thin disk shaped membrane. (rochester.edu)
  • That's important for researchers who want to make and study long nanotubes. (scienceblog.com)
  • An international team of 29 researchers devised the the yarn material, known as twistron harvesters, "by tying a carbon nanotube string into a tangled weave of carbon and submerging it into an electrolyte gel," according to Science Magazine. (inhabitat.com)
  • Researchers at Purdue University and the Indian Institute of Technology Madras studied the use of carbon nanotubes to advance ambient ionization techniques. (purdue.edu)
  • Researchers found that when paper used to collect a sample was coated with carbon nanotubes, the voltage required was 1,000 times reduced, the signal was sharpened and the equipment was able to capture far more delicate molecules. (purdue.edu)
  • For more than forty years, the world has been aware of the potential of carbon nanotubes as a base material. (edu.au)
  • PASADENA, Calif.- The potential of carbon nanotubes to diagnose and treat brain tumors is being explored through a partnership between NASA's Jet Propulsion Laboratory, Pasadena, Calif., and City of Hope, a leading cancer research and treatment center in Duarte, Calif. (nasa.gov)
  • This book introduces the reader to the ultrafast nanoworld of graphene and carbon nanotubes including their unique properties and future perspectives. (wiley-vch.de)
  • The team isn't sure how the graphene and carbon nanotubes end up in the silk, but Pugno believes the spiders mop up materials in their environment as they spin. (newscientist.com)
  • A Stanford University engineering team has been busy bringing its grand achievement of 2013 -- the world's first carbon nanotube computer -- to a grand scale by making the performance competitive with silicon-based processors. (nsf.gov)
  • The Stanford work opens up the possibility of integrating carbon nanotubes on the silicon microchip, he says. (technologyreview.com)
  • Silicon-nanotube electrodes may enable lithium-ion batteries to store 10 times more charge. (technologyreview.com)
  • The findings, to be reported in the May 20 issue of Applied Physics Letters, are an important milestone in the effort to see if carbon nanotubes can someday replace ubiquitous silicon. (wsj.com)
  • The technique could facilitate the integration of carbon nanotubes as interconnects in next-generation integrated circuits that use both silicon and carbon components. (ecnmag.com)
  • To make it scalable for manufacturing, they also worked toward technologies for isolating and aligning individual carbon nanotubes between the metal terminals on a silicon substrate, and for examining the properties of the resulting structures. (ecnmag.com)
  • She fashioned crude filters by growing carbon nanotubes on a silicon surface. (nature.com)
  • Designers are examining the use of carbon nanotubes as an alternative material to carry electrical current across silicon wafers. (computerweekly.com)
  • Co-localized AFM topographic (top left) and Raman (top right) images of carbon nanotubes grown on a crystalline silicon substrate. (horiba.com)
  • JPL's Nano and Micro Systems Group grows the nanotubes on silicon strips a few square millimeters in area. (nasa.gov)
  • People have been talking about a new era of carbon nanotube electronics moving beyond silicon," said Subhasish Mitra, an electrical engineer and computer scientist at Stanford, in a prepared statement. (campustechnology.com)
  • Thus, some nanotubes have conductivities higher than that of copper, while others behave more like silicon. (wikipedia.org)
  • The material grants the electrical properties of nanotubes onto substrates coated with NanoINK, i.e. paper or cotton fiber. (inhabitat.com)
  • Rice chemist Andrew Barron, also a professor at Swansea in the United Kingdom, and his team have figured out how to get nanotubes clean and in the process discovered why the electrical properties of nanotubes have historically been so difficult to measure. (eurekalert.org)
  • In addition to their mechanical potential, several projects address the electrical properties of nanotubes, including interaction with electromagnetic radiation, for applications as diverse as power transmission, electromagnetic shielding and cancer therapies. (soci.org)
  • Diameters of single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs) are typically 0.8 to 2 nm and 5 to 20 nm, respectively, although MWNT diameters can exceed 100 nm. (wikipedia.org)
  • Metallic single-walled carbon nanotubes (SWNTs) can be selectively etched and eliminated from a substrate without damaging their semiconducting SWNT neighbors, thanks to a finely tuned methane plasma reaction (Science 2006, 314, 974). (nanotech-now.com)
  • The method also contemplates methods and apparatus which recycle and reuse the gases and catalytic particulate materials, thereby maximizing cost efficiency, reducing wastes, reducing the need for additional raw materials, and producing the carbon nanotubes, especially SWNTs, in greater quantities and for lower costs. (google.com)
  • Carbon nanotubes may be either multi-walled (MWNTs) or single-walled (SWNTs), and have diameters in the nanometer range. (google.com)
  • Functionalization of single-walled nanotubes (SWNTs) has proven to enhance solubility and allow for efficient tumor targeting/drug delivery. (wikipedia.org)
  • The high electrochemically accessible surface area, high electrical conductivity and useful structural properties have demonstrated the potential use of single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs) in highly sensitive noninvasive glucose detectors. (wikipedia.org)
  • Todd Pappas at the University of Texas Medical Branch and his colleagues at Rice University have successfully stimulated rat neurons grown on carbon nanotube mats made of horizontally grown nanotubes. (technologyreview.com)
  • A lab at Rice University has stepped forward with an efficient method to disperse nanotubes in a way that preserves their unique properties -- and adds more. (redorbit.com)
  • The filters, produced in a Rice University laboratory, was developed from carbon nanotube materials that were grown in place on chemically-epoxidized quartz fibers. (naturalnews.com)
  • Purified single-walled carbon nanotubes dispersed in water promoted greater plant growth (center) than the nanomaterial-free control (left) after eight days of an experiment at Rice University. (eurekalert.org)
  • First, according to Rice University engineers, get a nanotube hole. (news-medical.net)
  • Scientists at Rice University are placing bismuth in nanotubes to tag stem cells for efficient tracking with CT scanners. (nsf.gov)
  • A group at Rice University has completed building the world's largest Nanotube model . (slashdot.org)
  • Rice University is a leader in this revolutionary field involving nanotubes and buckyballs, which have the potential to revolutionize certain areas of science. (slashdot.org)
  • By adding minute amounts of ozone to batches of single-walled carbon nanotubes and then exposing them to light, a team at Rice University succeeded in covering all the nanotubes with oxygen atoms, which systematically changed their near-IR fluorescence . (photonics.com)
  • The answer is a carbon nanotube - and a new study by Rice University scientists details exactly how the much-studied nanomaterials snap when subjected to ultrasonic vibrations in a liquid. (scienceblog.com)
  • BBC News reports the impending use of carbon nanotubes to create ultra-strong body armor. (extremetech.com)
  • The diameter lies in nanometer scale having the range from 0.5 nm to 2 nm for single-walled structures and is greater than several nm for multiwalled nanotubes, and the length even in microsize. (springer.com)
  • Carbon nanotubes are the most studied carbon structures due to their outstanding mechanical, electrical, optical, and chemical properties what offer a broad range of possible applications. (springer.com)
  • Drexel University engineers continue to drive research into the use of carbon nanotubes, straw-like structures that are more than 1,000 times thinner than a single human hair. (drexel.edu)
  • Carbon nanotube structures have long held promise as extremely efficient semiconductors, but have been difficult to produce without impurities that impede their performance. (csmonitor.com)
  • Systems being used currently for drug delivery include dendrimers, polymers, and liposomes, but carbon nanotubes present the opportunity to work with effective structures that have high drug loading capacities and good cell penetration qualities. (wikipedia.org)
  • A new method for purifying carbon nanotubes could make them a plausible vehicle for semiconductor advances - but only if the technique can scale up to commercial manufacturing and compete against cutting-edge CMOS technology. (extremetech.com)
  • In the last couple of years, carbon nanotubes have overshadowed nanowires. (howstuffworks.com)
  • These fields then can cause nanotubes to assemble into nanowires. (wired.com)
  • This book gives a detailed and up-to-date overview of the linearized augmented cylindrical wave (LACW) technique for nanotubes and nanowires. (routledge.com)
  • Extensive illustrations of application to the inorganic nanotubes and nanowires make the book essential reading in this field above all. (routledge.com)
  • They tested individual nanotubes the same way one would test any electrical conductor: by touching them with two probes to see how much current passes through the material from one tip to the other. (eurekalert.org)
  • The nano wire could just be a bundle of individual nanotubes. (wired.com)
  • The trick was to isolate these tiny, nanoscale antennae and keep them from bundling together because individual nanotubes must project out of the paper," he said. (purdue.edu)
  • Materials scientists initially thought the super-hot temperatures caused the nanotubes to tear. (redorbit.com)
  • By exposing a glass plate placed inside a vacuum chamber to the correct amount of heat and carbon mixed gas, scientists can cause forests of carbon nanotubes to grow on its surface. (nsf.gov)
  • According to two reports published in the November 2 issue of the journal Nature , scientists have discovered the smallest stable carbon nanotubes known. (scientificamerican.com)
  • Keeping carbon nanotubes from clumping in aqueous solutions and combining them with molecules that add novel abilities have been flies in the ointment for scientists exploring the use of these highly versatile materials. (redorbit.com)
  • The scientists determined that when they exposed their altered nanotubes to light in the visible range, carbon atoms in the walls of the tubes accept the electrons originally associated with the ferrocene molecules. (scientificamerican.com)
  • Scientists first wanted to see how easily they could slip nanotubes into chloroplasts, the cellular factories that turn sunlight and carbon dioxide into energy and sugars. (wired.com)
  • This is what the scientists saw when they looked at plants that had been transformed with carbon nanotubes. (wired.com)
  • Scientists at Rice and Swansea universities have demonstrated that heating carbon nanotubes at high temperatures eliminates contaminants that make nanotubes difficult to test for conductivity. (eurekalert.org)
  • Carbon nanotubes bound for electronics need to be as clean as possible to maximize their utility in next-generation nanoscale devices, and scientists at Rice and Swansea universities have found a way to remove contaminants from the nanotubes. (eurekalert.org)
  • Scientists at MIT built a 16-bit microprocessor out of carbon nanotubes and even ran a program on it, a new paper reports. (gizmodo.com.au)
  • Far stronger than any known filament, carbon nanotubes are manufactured by scientists who roll a single-atom-thick stretch of carbon, in the form of graphite, into tiny tubes. (extremetech.com)
  • It's been a long time coming, but scientists are at the cusp of realizing the dream of carbon nanotubes. (sfgate.com)
  • Carbon nanotubes are like a materials scientists' dream come true -- superior heat and electrical conduction , high strength to weight ratio , and flame resistance orders of magnitude higher than many commonly used materials. (dailytech.com)
  • For well over a decade, scientists have used ultrasonic vibrations to separate and prepare nanotubes in the lab. (scienceblog.com)
  • Scientists input the sonication power and the amount of time the sample will be sonicated, and the power law tells them the average length of the nanotubes that will be produced. (scienceblog.com)
  • Scientists created carbon nanotube yarn that generates power when it's tugged. (inhabitat.com)
  • Fused double-walled carbon nanotube (DWNT) fibers were made with a strength of a 700 GPa Young's modulus. (nextbigfuture.com)
  • These are ultralong (several centimeters) carbon nanotube fibers have been made into stronger bundles. (nextbigfuture.com)
  • Finally ultralong (several centimeter) carbon nanotube fibers have been made into stronger bundles. (nextbigfuture.com)
  • Barron said engineers who use nanotube fibers or films in devices currently modify the material through doping or other means to get the conductive properties they require. (eurekalert.org)
  • Thin, flexible fibers made of carbon nanotubes have now proven able to bridge damaged heart tissues and deliver the electrical signals needed to keep those hearts beating. (news-medical.net)
  • They crafted complex molecular dynamics simulations using an array of supercomputers to tease out what caused the carbon nanotubes to break. (redorbit.com)
  • Li C, Chou TW (2006) Multiscale modeling of compressive behavior of carbon nanotube/polymer composites. (springer.com)
  • Based on electron beam-induced deposition (EBID), the work is believed to be the first to connect multiple shells of a multi-walled carbon nanotube to metal terminals on a semiconducting substrate, which is relevant to integrated circuit fabrication. (ecnmag.com)
  • Discussed are the performance and applications of thermoplastic, thermoset, and elastomer composites comprising Arkema Graphistrength® multi-walled carbon nanotube products, with emphasis on the effect of proper dispersion, and the excellent utility of masterbatches. (nsti.org)
  • Carbon nanotubes - hollow tubes of pure carbon about as wide as a strand of DNA - are one of the most-studied materials in nanotechnology. (scienceblog.com)
  • Discovered more than 20 years ago, carbon nanotubes are one of the original wonder materials of nanotechnology. (scienceblog.com)
  • In nanotechnology, carbon nanotube interconnects refer to the proposed use of carbon nanotubes in the interconnects between the elements of an integrated circuit. (wikipedia.org)
  • Single-wall carbon nanotubes are an important class of carbon nanomaterials with significant potential for commercial applications. (nist.gov)
  • Our results suggest that careful scrutiny of the genotoxicity of nanomaterials is needed even for those materials, like multi-walled carbon nanotubes, that have been previously demonstrated to have limited or no toxicity at the cellular level" Dr. Liming Dai tells Nanowerk. (medgadget.com)
  • Metallic boron nanotubes would still be useful, however, as they should be better conductors than carbon. (newscientist.com)
  • Baughman's group started by growing a carpet of nanotubes on a metallic substrate. (asme.org)
  • Metallic Molecules To Nanotubes: Spread Out! (redorbit.com)
  • 10. The process of claim 9 wherein the step of separating the carbon nanotubes from the metallic catalyst further comprises treating the metallic catalyst with acid or base to dissolve the metallic catalyst thereby yielding the carbon nanotubes. (google.com)
  • Carbon nanotubes can be metallic or semiconducting depending on their structure. (wikipedia.org)
  • Metallic carbon nanotubes have been identified as a possible interconnect material for the future technology generations and to replace copper interconnects. (wikipedia.org)
  • Because of differences in the way the familiar chicken-wire patterns of carbon atoms line up across the surface, nanotubes can either act as metals or semiconductors. (asme.org)
  • And because of differences in the way the familiar chicken-wire patterns of carbon atoms line up across the surface, nanotubes can either act as metals (potentially conducting greater current densities than copper) or semiconductors. (asme.org)
  • A carbon nanotube is a nano-size cylinder of carbon atoms. (howstuffworks.com)
  • In other words, even though all carbon nanotubes are made of carbon, they can be very different from one another based on how you align the individual atoms . (howstuffworks.com)
  • Carbon nanotubes can also be effective semiconductors with the right arrangement of atoms. (howstuffworks.com)
  • 10. The nanotube of claim 5 wherein the semiconducting section comprises electron-donating dopant atoms. (freepatentsonline.com)
  • The nanotubes were 2.5 nanometers in diameter, or about the length of a row of 25 hydrogen atoms. (trnmag.com)
  • Single-walled carbon nanotubes treated with ozone incorporate oxygen atoms that shift and intensify the nanotubes' near-infrared fluorescence emission. (photonics.com)
  • Chwał M, Muc A (2016) Transversely isotropic properties of carbon nanotube/polymer composites. (springer.com)
  • Griebel M, Hamaekers J (2004) Molecular dynamics simulations of the elastic moduli of polymer-carbon nanotube composites. (springer.com)
  • Nanotube composites could safely channel strikes to harmless locations, protecting the aircraft's electronics. (dailytech.com)
  • Kahp Suh and his colleagues have developed a technique for aligning nanotubes over large areas based on the flow of a nanotube-containing solution through nanochannels. (medgadget.com)
  • These are: SRM 2483, homogenous vials of single wall carbon nanotube soot released in 2011, and RM 8281, a set of different average length nanotube populations in aqueous dispersion. (nist.gov)
  • When the channels are of the correct geometry, aqueous solutions containing nanotubes enter from both ends, and upon evaporation leave behind dense and highly oriented arrays of nanotubes. (medgadget.com)
  • Good adhesion is required between the nanochannel and the substrate to prevent the polymer nanochannels from coming unstuck upon the introduction of the aqueous nanotube solution. (medgadget.com)
  • Nucleic acid molecules in a stabilized solution such as single stranded DNA and RNA were able to disperse high concentration of bundled carbon nanotubes into aqueous solution. (google.com)
  • The complete overview of the state-of-the-art addresses different synthesis and biofunctionalisation routes and shows the structural and magnetic properties of nanotubes relevant to biomedical applications. (springer.com)
  • This paper reports an experimental study on the synthesis and structural characterization of lead zirconate, PbZrO 3 , (PZ) nanotubes fabricated by an improved sol-gel method within the nanochannels of anodic aluminum oxide (AAO) templates. (ingentaconnect.com)
  • Thus, in this work the synthesis conditions were searched for obtaining spherical particles of TiO2 nanotubes, which could present a bimodal pore size distribution, i.e. first peak at about 4 nm which may be attributed to the main nanotube channel and other peaks at about 8 - 10 nm which are the interparticle pores. (nsti.org)
  • There are now thirty or more forms of fullerenes, and also an extended family of linear molecules, carbon nanotubes. (nanotech-now.com)
  • Possibly more important than fullerenes are Carbon nanotubes, which are related to graphite. (nanotech-now.com)
  • To actually make the boron tubes, Ni suggests chemical vapour deposition, which is a process already used to grow carbon nanotubes. (newscientist.com)
  • A new study has shown that adding boron-nitride nanotubes to the surface of cancer cells can double the effectiveness of Irreversible Electroporation, a minimally invasive treatment for soft tissue tumors in the liver, lung, prostate, head and neck, kidney and pancreas. (scienceblog.com)
  • The Nano and Micro Systems Group at JPL, which has been researching nanotubes since about 2000, creates these tiny, cylindrical multi-walled carbon tubes for City of Hope. (nasa.gov)
  • The nanotubes, each about 10 nanometers in diameter and 300 micrometers long, grown vertically on the substrate, can pack as closely as one trillion per square inch. (asme.org)
  • The carbon nanotubes used in this study measure as small as 70 nanometers in outer diameter and are currently the smallest chromatography columns ever made. (drexel.edu)
  • Using nanotubes measuring in the tens of nanometers, Nanocomp produces sheets of carbon nanotubes measuring 3 by 6 feet. (dailytech.com)
  • 1. An augmented synthetic resin, comprising carbon nanotubes thoroughly disaggregated and uniformly dispersed in a polymethylmethacrylate matrix, said nanotubes having lengths between substantially 10-1000 nanometers and diameters between substantially 10-50 nanometers. (google.es)
  • 3. The synthetic resin of claim 2 , wherein said carbon nanotubes have diameters between substantially 10-50 nanometers. (google.es)
  • Chwał M (2011) Influence of vacancy defects on the mechanical behavior and properties of carbon nanotubes. (springer.com)
  • Cornwell CF, Wille LT (1997) Elastic properties of single-walled nanotubes in compression. (springer.com)
  • Govindjee G, Sackman JL (1999) On the use of continuum mechanics to estimate the properties of nanotubes. (springer.com)
  • Hernandez E, Goze C, Bernier P, Rubio A (1998) Elastic properties of C and B x C y N z composite nanotubes. (springer.com)
  • Lu JP (1997) Elastic properties of single and multilayered nanotubes. (springer.com)
  • According to the latest calculations, tubes built out of the element boron could have many of the same properties as carbon nanotubes, the ubiquitous components of nanoengineering. (newscientist.com)
  • The various beneficial properties of carbon nanotubes makes them the most attractive material to base such nanomotors on. (wikipedia.org)
  • The key aspects of liquid phase dispersion and processing though hinge on controlling the properties of the interfacial layer between the nanotube and the solution to enable dispersion, selective fractionation and/or biocompatibility. (nist.gov)
  • That separation is critical to manufacturers who want to spin fiber from nanotubes, or mix them into composite materials for strength or to take advantage of their electrical properties. (redorbit.com)
  • But while these techniques can separate nanotubes from one another, they take a toll on the nanotubes' electronic, thermal and mechanical properties. (redorbit.com)
  • Carbon nanotubes are a cutting-edge component used in the fields of electronics, medicine and industrial design due to their size, strength and electrical properties. (inhabitat.com)
  • Carbon nanotubes--tiny strawlike cylinders of pure carbon--have interesting electrical properties. (scientificamerican.com)
  • They simply sprayed the spiders with water containing the nanotubes or flakes and then measured the mechanical properties of the silk that the spiders produced. (jwz.org)
  • Carbon nanotube properties depend on how you roll the sheet. (howstuffworks.com)
  • The outstanding electrical and mechanical properties of single carbon nanotubes (CNT) are the motivation for an intensive research in various fields of application. (springer.com)
  • For this purpose, we exploit the quantum properties of finite-sized carbon nanotubes. (nih.gov)
  • The usual random sized lengths of entangled carbon nanotube created by other methods have so far allowed only relatively crude applications and constrained their use in drug delivery and complex electronics because of the resulting inability to guarantee consistent properties. (edu.au)
  • A key result of our work is that if contacts on a nanotube are less than 1 micron apart, the electronic properties of the nanotube change from conductor to semiconductor, due to the presence of overlapping depletion zones, which shrink but are still present even in clean nanotubes," Barron said. (eurekalert.org)
  • Solution annealing and different aging times (1, 24, and 72 hours) are conducted to synthesize the Y-shaped PFO-DBT nanotubes and the effects on the morphological, structural, and optical properties of Y-shaped PFO-DBT nanotubes are investigated. (hindawi.com)
  • The effects of solution annealing and aging process are essential for the improvement on the morphological, structural, and optical properties of Y-shaped PFO-DBT nanotubes. (hindawi.com)
  • Nanotubes comprising adjacent sections having differing electrical properties are described. (freepatentsonline.com)
  • The nanotube can be designed having different indices on either side of a junction point in a continuous tube so that the electrical properties on either side of the junction vary in a useful fashion. (freepatentsonline.com)
  • Alternatively, the nanotube may exhibit different semiconductor properties on either side of the junction. (freepatentsonline.com)
  • Multi-walled carbon nanotubes are of great interest - primarily based upon their electrical and mechanical properties. (nsti.org)
  • The secret is carbon nanotubes, a relatively new material that has a number of unusual properties. (csmonitor.com)
  • The structure of these nanotubes makes them extremely strong proportional to their size and weight, giving them have extraordinary electrical semiconductive properties. (csmonitor.com)
  • Despite the groundbreaking properties of the nanotubes, the molecular scale of the material has made it difficult to fully utilize the material's potential so far. (csmonitor.com)
  • Many of the optical and material properties of nanotubes were discovered at Rice's Smalley Institute for Nanoscale Science and Technology, and the first large-scale production method for making single-wall nanotubes was discovered at Rice by the institute's namesake, the late Richard Smalley. (scienceblog.com)
  • Further research is needed to determine whether carbon nanotubes will eventually serve as a replacement for complementary metal-oxide semiconductor manufacturing techniques used today, but the discovery of the material's high mobility shows that it could work as a semiconductor. (computerweekly.com)
  • Nanotube memory may one day supercede semiconductor flash memory due to its potential cheapness, reduced component size and favorable electrical characteristics. (fastcompany.com)
  • The present invention comprises a new nanoscale metal-semiconductor, semiconductor-semiconductor, or metal-metal junction, designed by introducing topological or chemical defects in the atomic structure of the nanotube. (freepatentsonline.com)
  • 6. The nanotube of claim 5 further comprising a junction having at least one pentagon-heptagon pair, adjoined on one side to the electrically conducting section and on the other side to the semiconductor section. (freepatentsonline.com)
  • This breakthrough in carbon nanotube transistor performance is a critical advance toward exploiting carbon nanotubes in logic, high-speed communications, and other semiconductor electronics technologies. (csmonitor.com)
  • if n − m is a multiple of 3, then the nanotube is semiconducting with a very small band gap, otherwise the nanotube is a moderate semiconductor. (wikipedia.org)
  • youtube]https://www.youtube.com/watch?v=6Mpfxpygs3g[/youtube] Decker Yeadon's secret sauce is called NanoINK , a compound made out of carbon nanotubes, deionized water, and a chemical surfactant that helps nanotubes disperse in water. (inhabitat.com)
  • The invention relates the use of biopolymers to disperse carbon nanotubes for use in nanodevices. (google.com)
  • More specifically nucleic acid molecules have been found to disperse bundled carbon nanotubes. (google.com)
  • These nanotube clumps won't dissolve in common solvents, but sonication can break these clumps apart in order to separate, i.e., disperse, the nanotubes. (scienceblog.com)
  • HRTEM image and a typical SEM image confirmed that the obtained PZ nanotubes composed of nanoparticles in the range of 4-8 nm. (ingentaconnect.com)
  • A carbon nanotube is a microscopic pipe made of carbon, about 1/10,000th the diameter of a human hair - that is one billionth of a meter thick. (computerweekly.com)
  • A major obstacle to such efforts has been the diversity of tube diameters, chiral angles, and aggregation states in nanotube samples obtained from the various preparation methods. (google.com)
  • Ma PC, Kim JK (2011) Carbon nanotubes for polymer reinforcement. (springer.com)
  • In many ways single-wall carbon nanotubes can be seen as the ultimately rigid polymer molecule, and this perspective has stimulated new routes for processing. (soci.org)
  • 8. A dental restoration, comprising a body at least partially constructed from an augmented synthetic resin including carbon nanotubes dispersed in a biocompatible polymer of polymethylmethacrylate dissolved in a biocompatible reactive monomer of methylmethacrylate. (google.es)
  • They calculate that this is the most stable known theoretical structure for a boron nanotube. (newscientist.com)
  • The book gives for the first time a combined theoretical and experimental description of topics like luminescence of carbon nanotubes, Raman scattering, or transport measurements. (wiley-vch.de)
  • Nagoya, Japan - Professor Stephan Irle of the Institute of Transformative Bio-Molecules (WPI-ITbM) at Nagoya University and co-workers at Kyoto University, Oak Ridge National Lab (ORNL), and Chinese research institutions have revealed through theoretical simulations that the molecular mechanism of carbon nanotube (CNT) growth and hydrocarbon combustion actually share many similarities. (eurekalert.org)
  • Using carbon nanotubes as small electrodes might one day lead to safe and effective retinal implants. (technologyreview.com)
  • Fishman, who is now at the Plager Vision Center in Santa Cruz, CA, says that the human body would not treat implants containing carbon nanotube electrodes as foreign objects. (technologyreview.com)
  • In addition, the Stanford team could make very small electrodes, 50 or 100 micrometers in diameter, out of the carbon nanotubes, which are tough, flexible, and good electrical conductors. (technologyreview.com)
  • With the smaller carbon nanotube electrodes, Auciello says, "You can address much lower number of cells with one electrode, even if it doesn't go to a single cell. (technologyreview.com)
  • Slide (a) shows the structure of the CNT, with a carbon nanotube connected between two palladium electrodes on top of a hafnium dioxide dielectric gate insulator. (zdnet.com)
  • The device, built by Peter Burke and his team at the University of California at Irvine, is made from a carbon nanotube squeezed between two gold electrodes. (theregister.co.uk)
  • A breakthrough in carbon nanotubes could expand their biological and material applications, allowing them to be tracked in single cells or used in novel lasers and more. (photonics.com)
  • Now a breakthrough from Nanocomp Technologies , a New Hampshire startup, promises to provide sheets composed of carbon nanotubes on an unprecedented scale. (dailytech.com)
  • The nanotubes could form together to make one super long nanotube wire. (wired.com)
  • Using carbon nanotubes to make stronger ceramics, lighter car bodies, or other materials applications could have enormous impact on day-to-day life, similar to the way plastics changed the world in the mid-20th century. (asme.org)
  • Is there anything that can't be made lighter, stronger and cooler-sounding with carbon nanotubes? (techradar.com)
  • China has carbon nanotube bundles in the lab that are 20 times stronger than kevlar. (nextbigfuture.com)
  • In clean nanotubes, resistance got progressively stronger as the distance increased, as it should. (eurekalert.org)
  • But that would be a waste because this material, made from carbon nanotubes, is stronger and more compliant then kevlar or carbon fibre. (gizmodo.com.au)
  • The group also learned that cutting single-walled carbon nanotubes using sound waves in water creates multiple kinks, or bent areas, along the tubes' length. (redorbit.com)
  • As individual tubes are drawn from a dense thicket of nanotubes (top and middle), they pull away adjoining tubes to create a long, horizontal array. (asme.org)
  • Where the aerogel and the nanotubes meet, tubes catch on the aerogel and are pulled from the substrate. (asme.org)
  • Thanks to the close packing of the tubes and to an attractive force operating at the molecular level, a nanotube breaking away from its base will pull away other tubes. (asme.org)
  • The ligands strongly bind to nanotubes while the attached ruthenium molecules interact with water to maintain the tubes in solution and keep them apart from one another. (redorbit.com)
  • A nanotube may consist of one tube of graphite, a one-atom thick single-wall nanotube, or a number of concentric tubes called multiwalled nanotubes. (nanotech-now.com)
  • The chief problem was the "nano" part of the nanotubes -- these tiny tubes would need to be scaled to visible-sized pieces of material in order to be utilized in many practical devices. (dailytech.com)
  • The hardest part about making nanotube materials is growing long enough tubes. (dailytech.com)
  • Carbon nanotubes for interconnects application in Integrated chips have been studied since 2001, however the extremely attractive performances of individual tubes are difficult to reach when they are assembled in large bundles necessary to make real via or lines in integrated chips. (wikipedia.org)
  • Carbon nanotubes--those minute cylinders of carbon poised to revolutionize the fields of materials science and electronics--just got even smaller. (scientificamerican.com)
  • Nanotubes are cylinders with walls that are only as wide as a single carbon atom. (computerweekly.com)
  • Chwał M (2017) Deformations and tensile fracture of carbon nanotubes based on the numerical homogenization. (springer.com)
  • Xuemei Zhou, Ning Liu, and Patrik Schmuki, " Photocatalysis with TiO 2 Nanotubes: "Colorful" Reactivity and Designing Site-Specific Photocatalytic Centers into TiO 2 Nanotubes ," ACS Catalysis , pp. 3210-3235, 2017. (hindawi.com)
  • Ajayan PM (2000) Carbon nanotubes. (springer.com)
  • In 2000, Phillippe Poulin of the Paul Pascal Research Center in Pessac, France, developed a technique for extruding a fiber from a soup of carbon nanotubes. (asme.org)
  • #0726791 , Collaborative Research: Design, Modeling, Automation and Experimentation of Nanoscale Computing Fabric Using Carbon Nanotubes. (nsf.gov)
  • Burning those contaminants away, Barron said, creates new possibilities for carbon nanotubes in nanoscale electronics. (eurekalert.org)
  • The article, "Substituent effects on the redox states of locally functionalized single-walled carbon nanotubes revealed by in situ photoluminescence spectroelectrochemistry," was published in Nanoscale at DOI:10.1039/c7nr05480g. (eurekalert.org)
  • Due to their nanoscale dimensions, electron transport in carbon nanotubes will take place through quantum effects and will only propagate along the axis of the tube. (wikipedia.org)
  • further diffusion through nanotube channels may be enhanced by the association of TiO2-nanotubes into homogeneous sub-micron size particles, which creates alternate pathways between those particles. (nsti.org)
  • The results obtained by SEM/TEM and N2-adsorption (BET) show how polymeric type molecules can promote the formation of spherical particles of TiO2 nanotubes, which display a secondary pore size distribution at about 8 - 10 nm. (nsti.org)
  • The fact that we can get pristine and really clean nanotubes from Manohara's department is unique," he said. (nasa.gov)
  • Image Caption: High-intensity atomic-level sonic boomlets cause nanotubes to buckle and twist at "compression-concentration zones. (redorbit.com)
  • Other inorganic nanotubes have been synthesized too, i.e. (nsti.org)
  • At the molecular level, the difference between graphite and carbon nanotubes is similar to that between sheet metal and steel tubing of the same gauge. (asme.org)
  • Nanotubes can grow on graphite in an unruly mass according to 'space's recipe. (flickr.com)
  • The team's work focused on nanotubes in their raw form as a fine, graphite-like powder, a form that has caused severe lung inflammation in lab tests. (photonics.com)
  • Newly grown nanotubes can be a thousand times longer than they are wide, and although sonication is very effective at breaking up the clumps, it also makes the nanotubes shorter. (scienceblog.com)
  • 9. The nanotube of claim 5 wherein the semiconducting section and the electrically-conducting section comprise carbon pentagon-heptagon pairs distributed approximately uniformly throughout their lengths, the conducting section having a higher concentration of pentagon-heptagon pairs than the semiconducting section. (freepatentsonline.com)
  • Finally, we demonstrate the performance of a nanotube transistor with channel and contact lengths of 20 nm, an on-current of 10 µA, an on/off current ratio of 1 x 10⁵, and peak transconductance of 20 µS. (nih.gov)