Nanotubes, Carbon
Nanotubes
Nanotubes, Peptide
Nanotechnology
Graphite
Fullerenes
Nanocomposites
Nanostructures
Soot
Biosensing Techniques
Microscopy, Electron, Transmission
Spectrum Analysis, Raman
Thermogravimetry
Microscopy, Electron, Scanning
Nanomedicine
Electrodes
Materials Testing
Semiconductors
Conductometry
Adsorption
Carbon
Electrochemistry
Metal Nanoparticles
Surface Properties
Electrochemical Techniques
Titanium
Nanowires
Cell Surface Extensions
Enzymes, Immobilized
Mechanical Phenomena
Infrared Rays
Granuloma, Foreign-Body
Cell Membrane Structures
Biocompatible Materials
Transistors, Electronic
Biomedical and Dental Materials
Polymers
Gold
Spectroscopy, Fourier Transform Infrared
Microscopy, Atomic Force
Ecotoxicology
Inhalation Exposure
Quantum Dots
DNA, A-Form
Dendrimers
Surface-Active Agents
Drug Delivery Systems
Polyacetylenes
Optical Devices
Dielectric Spectroscopy
Water
Glass
Nanofibers
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)Symptoms: The symptoms of a foreign-body granuloma depend on the location and size of the foreign body, but may include redness, swelling, pain, and difficulty moving the affected area.
Causes and risk factors: A foreign body can enter the body through a variety of means, such as puncture wounds, lacerations, or surgical incisions. Risk factors for developing a foreign-body granuloma include poor hygiene, accidental injuries, and certain medical conditions that impair immune function.
Diagnosis: Diagnosis of a foreign-body granuloma is based on a combination of physical examination, imaging studies, such as X-rays or CT scans, and histopathology.
Treatment: Treatment of a foreign-body granuloma depends on the size and location of the foreign body, but may include surgical removal of the foreign body, antibiotics for any accompanying infections, and management of any complications. In some cases, no treatment may be necessary, and the granuloma may resolve on its own over time.
Prognosis: The prognosis for a foreign-body granuloma is generally good if the foreign body is removed promptly and there are no complications. However, if left untreated, the granuloma can become chronic and cause ongoing symptoms and discomfort. In rare cases, the granuloma may progress to more severe conditions, such as sepsis or tissue necrosis.
Prevention: Prevention of foreign-body granulomas involves good hygiene practices, such as washing hands regularly and avoiding contact with potential sources of infection. In high-risk individuals, such as those with compromised immune systems, it may be advisable to avoid certain activities or environments that could increase the risk of infection.
Carbon nanotubes in medicine
Carbon nanotubes in interconnects
Timeline of carbon nanotubes
Synthesis of carbon nanotubes
Carbon nanotubes in photovoltaics
Nanotube
Carbon nanotubes for water transport
Potential applications of carbon nanotubes
Mechanical properties of carbon nanotubes
Optical properties of carbon nanotubes
Phenine nanotube
Nanotube membrane
BCN nanotube
Tunneling nanotube
Silicon nanotube
Carbon nanotube
Selective chemistry of single-walled nanotubes
Radiometer Assessment using Vertically Aligned Nanotubes
Boron nitride nanotube
Carbon nanotube nanomotor
Graphenated carbon nanotube
Non-carbon nanotube
Carbon nanotube transistor
Carbon nanotube springs
Gallium nitride nanotube
Carbon nanotube chemistry
Carbon nanotube computer
Carbon nanotube actuators
Ballistic conduction in single-walled carbon nanotubes
Carbon nanotube quantum dot
Docket 161: Carbon Nanotubes | NIOSH | CDC
Nanotubes for Conductive Plastics Move to the Next Performance Level
Carbon nanotubes for science and technology - Nokia Bell Labs
Separation of bacteria, protozoa and carbon nanotubes by density gradient centrifugation | NIST
Livermore lab uses carbon nanotubes for cheaper desalination - Foresight Institute
Carbon Nanotubes Serve as Funnel for Photons on Solar Panels - IEEE Spectrum
Scientific Image - Nanotubes Mimicking Gecko Feet | NISE Network
Synthesis of structurally pure carbon nanotubes using molecular seeds, page 1
Carbon Nanotube Muscles: Science Fiction in the News
A review of carbon nanotube structure
Frontiers | Glycopolymer-Wrapped Carbon Nanotubes Show Distinct Interaction of Carbohydrates With Lectins
Extreme Nanowires and Single Atom Coils of Metallic Tellurium Formed Within Ultra-Narrow Carbon Nanotubes
MIT Researchers Developer Carbon Nanotube Antenna To Make Solar Cells Smaller | Ubergizmo
Multi-walled carbon nanotubes - Multi-walled Carbon Nanotubes
Stab-Resistant Fabric Gains Strength from Carbon Nanotubes, Polyacrylate | Lab Manager
Promotion of oxygen reduction by a bio-inspired tethered iron phthalocyanine carbon nanotube-based catalyst | Nature...
Magnetic nanoribbons with embedded cobalt grown inside single-walled carbon nanotubes - Nanoscale (RSC Publishing)
Electro-Optical Properties of Carbon Nanotubes Obtained by High Density Plasma Chemical Vapor Deposition
Creating Predictable Patterns from Unpredictable Carbon Nanotubes
Carbon nanotube material removes 99% of heavy metals from water - NaturalNews.com
Water desalination with chemically modified carbon nanotube electrodes - SENSE
Graphene Nanotubes Prevent Static Electricity in TPU Hoses | plasticstoday.com
Nanotechnology Now - Press Release: Graphene nanotubes offer an efficient replacement for carbon additives in conductive...
Carbon nanotube structures changed by 'attack' from within, researchers discover
Nanotubes beam out bright light | Danish Optical Society
VIDEO: Carbon nanotube fibre breakthrough
Recommendations for Realizing the Full Potential of Nanotechnology and Carbon Nanotubes in the Energy Transition | Baker...
APS -2005 APS March Meeting
- Event - Highly nitrogen and boron doped nanotubes: a route to synthesis and study of their...
Self-assembly of carbon nanotube polyhedrons inside microchannels - A.J. Drexel Nanomaterials Institute
Multi-walled carbon nanotubes3
- 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)
- Commercialization of multi-walled carbon nanotubes (MWCNT)-based applications has been hampered by concerns regarding their lung toxicity potential. (nih.gov)
- Additionally, the technology was specifically developed for, and validated in, animal studies assessing exposure to airborne multi-walled carbon nanotubes (MWCNT). (nih.gov)
CNTs8
- For 20 years, carbon nanotubes (CNTs) have been the subject of intensive fundamental as well as applied research. (abovetopsecret.com)
- Carbon nanotubes (CNTs) are carbon allotropes with a nanostructure with a length-to-diameter ratio greater than one million. (pulsus.com)
- Carbon nanotubes (CNTs) are carbon allotropes. (pulsus.com)
- SkySpring Nanomaterials is a worldwide manufacturer and supplier of nanoparticles, nanopowders, micron powders, and CNTs (carbon nanotubes) in small quantity for research and in bulk order for industry groups. (nanowerk.com)
- Aligned carbon nanotubes (CNTs) grown by chemical vapor deposition are typically wavy, as seen in side view at the center of the illustration, rather than straight, as illustrated in a single nanotube at the right. (scitechdaily.com)
- From our previous work on aligned carbon nanotubes and their composites, we learned that more tightly packing the CNTs is a highly effective way to engineer their properties," says Wardle. (scitechdaily.com)
- Carbon nanotubes (CNTs) will be chemically modified to induce ion selective adsorption. (sense.nl)
- Carbon nanotubes (CNTs) are fullerene-like nanostructures that consist of graphene cylinders. (nih.gov)
MWCNT4
- Here, we demonstrate optimized procedures for separation of bacteria (Pseudomonas aeruginosa) from unbound multiwall carbon nanotubes (MWCNT) and MWCNT agglomerates using sucrose density gradient. (nist.gov)
- Using in vivo and in vitro approaches, we investigated the effectiveness of MWCNT functionalization with HA in increasing nanotube biocompatibility and reducing lung inflammatory and fibrotic effects. (nih.gov)
- The multiwalled carbon nanotubes (MWCNT) project examines the impact of nanotube length and diameter. (nih.gov)
- Pulmonary exposure to multiwalled carbon nanotubes (MWCNT) induces an inflammatory and rapid fibrotic response, although the long-term signaling mechanisms are unknown. (cdc.gov)
Single-wall carbon nanotubes3
- We investigated the interactions of noncovalent complexes of single-wall carbon nanotubes that are wrapped by disaccharide lactose-containing glycopolymers with the specific carbohydrate-binding proteins. (frontiersin.org)
- A. Hagen, G. Moss, V. Talalaev and T. Hertel, "Electronic Structure and Dynamics of Optically Excited Single-Wall Carbon Nanotubes," Applied Physics A: Materials Science & Processing, Vol. 78, No. 8, 2004, pp. 1137-1145. (scirp.org)
- L. Alvarez, A. Righi, S. Rols, E. Anglaret and J. L. Sauvajol, "On the Raman Spectrum of Nanobundles of Single Wall Carbon Nanotubes," Groupe de Dynamique des Phases Condenseés, Universite de Montpellier II, Montpellier, 2004. (scirp.org)
Carbon nanotube-based1
- Massachusetts Institute of Technology Superfund Research Program researchers have developed a sensitive and inexpensive carbon nanotube-based sensor that can measure N-nitrosamines in air. (nih.gov)
Conductivity4
- When ammonia gas is present, the conductivity of the nanotubes decreases, and thus resistance increases -- which can be easily measured. (extremetech.com)
- Replacement of a standard compound with TPU modified with graphene nanotubes results in stable, homogeneous conductivity of the final hoses, without compromising their strength or flexibility," said Maus. (plasticstoday.com)
- Like other 'p-type', electrophilic dopants - as opposed to 'n-type', or nucleophilic, dopants - iron chloride draws electrons from nanotubes, increasing the conductivity of a material. (chemistryworld.com)
- The working concentration of graphene nanotubes could be 50 times less than the dosage of graphite powder to reach the required level of electrical conductivity for generating heat. (nanotech-now.com)
SWCNTs3
- Second, carbon nanotubes have been used in sensors before, but usually the process involves dissolving SWCNTs in solvents, which can be dangerous. (extremetech.com)
- The tubes had at least two layers, and typically many more, and their outer diameters ranged from 3nm toto 5 nm.Two years later, singlewalled carbon nanotubes were discovered (SWCNTs were). (pulsus.com)
- Single-walled carbon nanotubes (SWCNTs) provide natural one-dimensional confinement that can be implemented for encapsulation, nanosynthesis, and polymerization of molecules into nanoribbons. (rsc.org)
Electrodes2
- developed single-walled carbon nanotubes using the same method as MWCNTs, but with the addition of transition metal particles to the carbon electrodes. (pulsus.com)
- Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes. (bvsalud.org)
Inflammatory and fibrotic1
- Multiwalled carbon nanotube-induced pulmonary inflammatory and fibrotic responses and genomic changes following aspiration exposure in mice: a 1-year postexposure study. (cdc.gov)
Graphene9
- Unlike conventional electrostatic discharge protection methods, graphene nanotubes won't negatively affect TPU properties. (plasticstoday.com)
- Thermoplastic polyurethane (TPU) modified with graphene nanotubes can prevent electrostatic buildup without affecting hose strength or flexibility, according to Christian Maus, PhD, Development and Support Leader for Thermoplastics at OCSiAl Group . (plasticstoday.com)
- By adding only 0.4 to 0.5 wt% of graphene nanotubes, our client was able to obtain thermoplastic polyurethane with resistance on the order of 10 6 ohm/sq, allowing the hoses to meet the typical requirements of industrial norms related to electrostatic risks. (plasticstoday.com)
- Additionally, graphene nanotubes' low working dosages make it possible to maintain the abrasion and chemical resistance, flexibility, and non-marking properties of TPU," said Maus. (plasticstoday.com)
- The use of graphene nanotubes increases productivity of conductive paints and improves their performance compared to standard conductive additives. (nanotech-now.com)
- Paint with graphene nanotubes can be heated up to 40 C in a few minutes. (nanotech-now.com)
- Increased productivity and improved performance of conductive heating paint were achieved by replacing standard conductive carbon additives, whose working concentration was about 25% of the total compound weight, with 0.5% graphene nanotubes from OCSiAl. (nanotech-now.com)
- Graphene nanotube paint and varnish solutions for residential heating have passed the development phase and are entering the market in the form of eco-friendly heating panels and conductive paints. (nanotech-now.com)
- Learn more on graphene nanotubes at tuball.com. (nanotech-now.com)
10,000 times2
- Carbon nanotubes are from 1,000 to 10,000 times longer than they are thick, so they deform principally along their length. (scitechdaily.com)
- Made by linking carbon atoms into a cylindrical pattern, such nanotubes are about 10,000 times smaller than width of a human hair. (nih.gov)
Composites2
- Carbon nanotubes are known to make composites tougher, and adding them to aramid/PAE further improved impact resistance. (labmanager.com)
- In the first in vivo demonstration of spectral triangulation, biocompatible composites of single-walled carbon nanotubes in Matrigel have been surgically implanted into mouse ovaries and then noninvasively detected and located. (nih.gov)
Nanotechnology2
SWCNT1
- With MIT's carbon nanotube pencil (Opens in a new window) , the lead is formed by compressing single-walled carbon nanotubes (SWCNT), until you have a substance that looks and behaves very similarly to graphite. (extremetech.com)
Researchers8
- The latest news item comes out of MIT where researchers have formed carbon nanotubes into a kind of antenna that focuses photons onto photovoltaic cells and reportedly concentrates solar energy 100 times more than a regular cell. (ieee.org)
- While this is all very far off from even a full-fledged prototype since the researchers have not yet built a photovoltaic cell that could use the antenna, it seems that commercial considerations are already being taken into account with concerns about the price per pound of single-walled carbon nanotubes being discussed. (ieee.org)
- The researchers claim that the nanotubes currently lose about 13 percent of the energy that they absorb but they're already working on new antennas that could lose only 1 percent. (ubergizmo.com)
- Now, researchers report in ACS Applied Nano Materials that carbon nanotubes and polyacrylate strengthen conventional aramid to produce lightweight, soft fabrics that provide better protection. (labmanager.com)
- A recolored optical image obtained by MIT researchers shows a heart-shaped carbon nanotube cell. (scitechdaily.com)
- Simply shaking up a solution of carbon nanotubes can alter the tubes' electronic properties, say researchers at McMaster University in Canada. (chemistryworld.com)
- Researchers found that cancer cells use straw-like nanotubes to siphon mitochondria from immune cells, essentially draining their energy. (nih.gov)
- Under an electron microscope, the researchers saw long, hollow appendages called nanotubes connecting the cancer cells and T cells. (nih.gov)
Nanowires1
- This work is published in 'Single-Atom scale structural selectivity in Te nanowires encapsulated inisde ultra-narrow single-walled carbon nanotubes' P. V. C. Medeiros, S. R. Marks, J. M. Wynn, A. Vasylenko, Q. Ramasse, D. Quigley, J. Sloan, A. J. Morris, ACS Nano, ASAP (2017). (warwick.ac.uk)
Multiwall1
- Multiwall carbon nanotubes are an extremely small conductive additive for plastics. (sae.org)
Creating a carbon1
- Here, creating a carbon nanotube sensor is as simple as drawing on a piece of paper -- either by a human, or an automated process. (extremetech.com)
Exposure1
- Carbon nanotube exposure has been evaluated under a NIOSH-NIEHS Interagency agreement to provide a better assessment of US worker exposures and occupational health concerns. (nih.gov)
Fibers2
- The team says that's because the nanotubes created bridges between the fibers, thereby increasing friction. (labmanager.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)
Exposures2
- Confocal microscopy demon- exposures to workers likely during the production strated nanotubes within the nucleus that were in or use of commercial products. (cdc.gov)
- This study will measure workplace exposures to carbon nanotubes and carbon nanofibers among a representative sample of US manufacturers and downstream users. (nih.gov)
Fibrous1
- The antennas are made of about 30 billion carbon nanotubes and resemble a fibrous strand with dimensions of 10 micrometers long and four micrometers thick. (ieee.org)
IEEE Spectrum1
- Phaedon Avouris has a good overview of future electronic applications of nanotubes published in IEEE Spectrum. (foresight.org)
Catalyst2
- Here we report a novel bio-inspired composite electrocatalyst, iron phthalocyanine with an axial ligand anchored on single-walled carbon nanotubes, demonstrating higher electrocatalytic activity for oxygen reduction than the state-of-the-art Pt/C catalyst as well as exceptional durability during cycling in alkaline media. (nature.com)
- Iron is often used as a catalyst for nanotube growth, but it is difficult to eliminate entirely from later processing. (chemistryworld.com)
Electrostatic1
- The nanotube-modified hoses meet the demands of heavy-duty operating applications, which frequently require a combination of electrostatic discharge protection and high abrasion resistance and durability. (plasticstoday.com)
Additionally1
- Additionally, the small size of the nanotubes, coupled with the low loading, results in a much smoother molded part surfaces than when larger additives are used. (sae.org)
Silicon2
- For each kind of silicon wafer surface, the carbon nanotubes were deposited with two different deposition times (two and three hours). (scirp.org)
- The nanotubes above have been carefully aligned on a special type of silicon chip called a carbon-nanotube size-tunable-enrichment-microdevice (CNT-STEM). (nih.gov)
Applications4
- The carbon nanotubes are high aligned and show singular properties that can be used for many applications. (scirp.org)
- R. Mansano and A. Mousinho, "Electro-Optical Properties of Carbon Nanotubes Obtained by High Density Plasma Chemical Vapor Deposition," Materials Sciences and Applications , Vol. 2 No. 5, 2011, pp. 381-389. (scirp.org)
- G. L. Zhao, D. Bagayoko and L. Yang, "Optical Properties of Aligned Carbon Nanotubes Mats for Photonic Applications," Journal of Applied Physics, Vol. 99, No. 11, 2006, pp. 114311-114311-5. (scirp.org)
- But John Robertson, an electrical engineer at the University of Cambridge, says the finding is by no means revolutionary and thinks the applications of nanotubes in electronics are still limited. (chemistryworld.com)
Stable1
- The first is that MIT has found a form of carbon nanotubes that is stable, safe, and cheap to produce. (extremetech.com)
Antenna1
- With that in mind, the smart folks over at MIT have come up with a nanotube antenna that can capture and focus light energy, potentially allowing much smaller and more powerful solar arrays. (ubergizmo.com)
Graphite2
- Aside from diamond, graphite and fullerene, the quasi-one-dimensional nanotube was originally identified by Ijima in 1991 in carbon soot produced by an arc-discharge process. (pulsus.com)
- However, in comparison with carbon black, graphite, or metal parts, nanotubes make it possible to obtain a more uniform consistency of paint and do not affect its practical properties. (nanotech-now.com)
Sensor2
- Carbon nanotubes are so sensitive that MIT's hand-drawn sensor can detect concentrations of ammonia as low as 0.5 parts per million (ppm). (extremetech.com)
- or perhaps their very own carbon nanotube pencil, for MacGyver-like sensor fabrication in the field. (extremetech.com)
Evaluate1
- The initial phase of the project included the procurement and physical and chemical characterization of 24 commercially available carbon nanotubes to evaluate the diversity of commercially available materials. (nih.gov)
Strength1
- Carbon nanotubes have incredible mechanical qualities due to the strength of their carbon-carbon bonds. (pulsus.com)
Solvents2
- Peter Kruse and colleague Kevin Moonoosawmy have found that reactions occurring when nanotubes are shaken in particular solvents - a routine procedure - produce chemicals that draw electrons from the nanotubes, effectively doping them. (chemistryworld.com)
- They noticed unexplained peak shifts in the Raman spectra of nanotubes that had been sonicated in chlorinated solvents. (chemistryworld.com)
Structural3
- The structural, electrical, mechanical, electromechanical, and chemical properties of carbon nanotubes have been studied extensively over the last decade. (pulsus.com)
- The carbon nanotubes structural characteristics were analyzed by Atomic Force Microscope and Scanning Electronic Microscope. (scirp.org)
- C. Li and T. W. Chou, "A Structural Mechanics Approach for the Analysis of Carbon Nanotubes," International Journal of Solids and Struc-tures, Vol. 40, No. 10, May 2003, pp. 2487-2499. (scirp.org)
Potentially1
- This result indicates that the wrapping conformation of glycopolymers on the surface of nanotubes potentially allows improved accessibility of the Glc for specific lectins. (frontiersin.org)
Materials2
- Sustainable production and use of carbon nanotube (CNT)-enabled materials requires efficient assessment of CNT environmental hazards, including their potential for bioaccumulation and biomagnification in environmental receptors. (nist.gov)
- Carbon nanotubes are the most powerful materials humans have ever discovered. (pulsus.com)
Typically1
- Single-walled nanotubes are typically smaller than multi-walled tubes, with widths ranging from 1- 2 nm with a bent rather than straight shape. (pulsus.com)
Measurements2
- The carbon nanotubes electrical characteristics were observed by Raman Spectroscopy and the carbon nanotubes electro-optical properties were analyzed by current vs voltage electrical measurements and photo-luminescence spectroscopy measurements. (scirp.org)
- The photoelectric effect in the carbon nanotubes were determined by photo-induced current measurements. (scirp.org)
Electrical1
- Carbon nanotubes are highly desirable because of their thermal, electrical, and mechanical properties, which are directionally dependent. (scitechdaily.com)
Lung1
- The nanotube bundles are similar to the potential of nanotubes to induce genetic damage size of microtubules that form the mitotic spindle in normal lung cells, cultured primary and immor- and may be incorporated into the mitotic spindle talized human airway epithelial cells were apparatus. (cdc.gov)
Properties5
- This scanning electron microscope image shows multiwalled carbon nanotubes attached to a polymer backing, an experiment designed to replicate the gecko foot's adhesive properties. (nisenet.org)
- The difference, though, is that drawing with MIT's pencil actually deposits whole carbon nanotubes on paper -- and carbon nanotubes have some rather exciting properties. (extremetech.com)
- In this work, we studied the electro-optical properties of high-aligned carbon nanotubes deposited at room temperature. (scirp.org)
- In this work, we obtained carbon nanotubes with semiconductor properties and carbon nanotubes with metallic properties. (scirp.org)
- Kruse thinks the research will help engineers pin down the source of unintentional doping and achieve greater control over the electronic properties of devices that use nanotubes, such as transistors. (chemistryworld.com)
Electron1
- Top, electron microscope image of a nanotube connecting a cancer cell with a T cell. (nih.gov)
Parameters1
- The electro-optical effects depend strongly on the substrate preparation and the deposition parameters of the carbon nanotubes. (scirp.org)
Immune5
- Sixteen hours after adding these stained cells to a cancer cell culture, they saw fluorescent mitochondria from the immune cells moving through the nanotubes and into the cancer cells. (nih.gov)
- They treated the mice with a combination of an inhibitor of nanotube formation and an immune checkpoint inhibitor. (nih.gov)
- Inhibiting nanotube formation could thus increase the efficacy of immune checkpoint inhibitor therapies for cancer. (nih.gov)
- Cancer kills when the immune system is suppressed and cancer cells are able to metastasize, and it appears that nanotubes can help them do both," Sengupta says. (nih.gov)
- Intercellular nanotubes mediate mitochondrial trafficking between cancer and immune cells. (nih.gov)
Effects1
- The authors point out that the nanotube inhibitors they tested have other effects. (nih.gov)
Form1
- However, there have been only a limited amount of approaches to form ordered magnetic structures inside the nanotube channels and the creation of magnetic nanoribbons is still lacking. (rsc.org)
Chemical2
- Arc discharge, laser ablation and chemical vapour deposition are some of the techniques that have been developed to create nanotubes in large quantities. (pulsus.com)
- We assumed that all the chemical procedures in nanotube preparation were well-studied. (chemistryworld.com)
Tissue2
Small size1
- The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the National Institute for Occu- sity and small size of carbon nanotubes makes respiratory pational Safety and Health. (cdc.gov)
Pure1
- The carbon nanotubes were deposited using pure methane plasmas. (scirp.org)
Size1
- SIZE: Each bundle of carbon nanotubes measures about 70-80 µm in width. (nisenet.org)