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.
The development and use of techniques to study physical phenomena and construct structures in the nanoscale size range or smaller.
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.
Keratins that form into a beta-pleated sheet structure. They are principle constituents of the corneous material of the carapace and plastron of turtles, the epidermis of snakes and the feathers of birds.
Nanometer-sized tubes composed of various substances including carbon (CARBON NANOTUBES), boron nitride, or nickel vanadate.
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.
LIGHT, it's processes and properties, and the characteristics of materials interacting with it.
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 mild astringent and topical protectant with some antiseptic action. It is also used in bandages, pastes, ointments, dental cements, and as a sunblock.
Relating to the size of solids.
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
Characteristics or attributes of the outer boundaries of objects, including molecules.
Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.
Electron microscopy in which the ELECTRONS or their reaction products that pass down through the specimen are imaged below the plane of the specimen.
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).
Spherical particles of nanometer dimensions.
Flat keratinous structures found on the skin surface of birds. Feathers are made partly of a hollow shaft fringed with barbs. They constitute the plumage.
An interdisciplinary field in materials science, ENGINEERING, and BIOLOGY, studying the use of biological principles for synthesis or fabrication of BIOMIMETIC MATERIALS.
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.
Materials fabricated by BIOMIMETICS techniques, i.e., based on natural processes found in biological systems.
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.
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.
A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].
Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
Nanometer-scale composite structures composed of organic molecules intimately incorporated with inorganic molecules. (Glossary of Biotechnology and Nanobiotechology Terms, 4th ed)
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.
The family Lampyidae, which are bioluminescent BEETLES. They contain FIREFLY LUCIFERIN and LUCIFERASES. Oxidation of firefly luciferin results in luminescence.
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.
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 methodology for chemically synthesizing polymer molds of specific molecules or recognition sites of specific molecules. Applications for molecularly imprinted polymers (MIPs) include separations, assays and biosensors, and catalysis.
Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance.
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.
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.
Characteristics of ELECTRICITY and magnetism such as charged particles and the properties and behavior of charged particles, and other phenomena related to or associated with electromagnetism.
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.
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.
The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Behavior of LIGHT and its interactions with itself and materials.
A biosensing technique in which biomolecules capable of binding to specific analytes or ligands are first immobilized on one side of a metallic film. Light is then focused on the opposite side of the film to excite the surface plasmons, that is, the oscillations of free electrons propagating along the film's surface. The refractive index of light reflecting off this surface is measured. When the immobilized biomolecules are bound by their ligands, an alteration in surface plasmons on the opposite side of the film is created which is directly proportional to the change in bound, or adsorbed, mass. Binding is measured by changes in the refractive index. The technique is used to study biomolecular interactions, such as antigen-antibody binding.
Scattering of a beam of electromagnetic or acoustic RADIATION, or particles, at small angles by particles or cavities whose dimensions are many times as large as the wavelength of the radiation or the de Broglie wavelength of the scattered particles. Also know as low angle scattering. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Small angle scattering (SAS) techniques, small angle neutron (SANS), X-ray (SAXS), and light (SALS, or just LS) scattering, are used to characterize objects on a nanoscale.
The study, control, and application of the conduction of ELECTRICITY through gases or vacuum, or through semiconducting or conducting materials. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
CIRCULAR DNA that is interlaced together as links in a chain. It is used as an assay for the activity of DNA TOPOISOMERASES. Catenated DNA is attached loop to loop in contrast to CONCATENATED DNA which is attached end to end.
Forms to which substances are incorporated to improve the delivery and the effectiveness of drugs. Drug carriers are used in drug-delivery systems such as the controlled-release technology to prolong in vivo drug actions, decrease drug metabolism, and reduce drug toxicity. Carriers are also used in designs to increase the effectiveness of drug delivery to the target sites of pharmacological actions. Liposomes, albumin microspheres, soluble synthetic polymers, DNA complexes, protein-drug conjugates, and carrier erythrocytes among others have been employed as biodegradable drug carriers.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.
A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).
Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)
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)
A trace element that is required in bone formation. It has the atomic symbol Sn, atomic number 50, and atomic weight 118.71.
Phenolic metacyclophanes derived from condensation of PHENOLS and ALDEHYDES. The name derives from the vase-like molecular structures. A bracketed [n] indicates the number of aromatic rings.
The study of the energy of electrons ejected from matter by the photoelectric effect, i.e., as a direct result of absorption of energy from electromagnetic radiation. As the energies of the electrons are characteristic of a specific element, the measurement of the energy of these electrons is a technique used to determine the chemical composition of surfaces.
The use of a quartz crystal microbalance for measuring weights and forces in the micro- to nanogram range. It is used to study the chemical and mechanical properties of thin layers, such as polymer coatings and lipid membranes; and interactions between molecues.
A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.
A silver salt with powerful germicidal activity. It has been used topically to prevent OPHTHALMIA NEONATORUM.
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.
Energy transmitted from the sun in the form of electromagnetic radiation.
Manufacturing technology for making microscopic devices in the micrometer range (typically 1-100 micrometers), such as integrated circuits or MEMS. The process usually involves replication and parallel fabrication of hundreds or millions of identical structures using various thin film deposition techniques and carried out in environmentally-controlled clean rooms.
The application of engineering principles and methods to living organisms or biological systems.
A genus, commonly called budgerigars, in the family PSITTACIDAE. In the United States they are considered one of the five species of PARAKEETS.
Chemical reactions effected by light.
Tellurium. An element that is a member of the chalcogen family. It has the atomic symbol Te, atomic number 52, and atomic weight 127.60. It has been used as a coloring agent and in the manufacture of electrical equipment. Exposure may cause nausea, vomiting, and CNS depression.
Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light.
A 60-kDa extracellular protein of Streptomyces avidinii with four high-affinity biotin binding sites. Unlike AVIDIN, streptavidin has a near neutral isoelectric point and is free of carbohydrate side chains.
Synthetic or natural materials, other than DRUGS, that are used to replace or repair any body TISSUES or bodily function.
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.
Steroidal compounds in which one or more carbon atoms in the steroid ring system have been substituted with nitrogen atoms.
The characteristic three-dimensional shape of a molecule.
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.
Particles consisting of aggregates of molecules held loosely together by secondary bonds. The surface of micelles are usually comprised of amphiphatic compounds that are oriented in a way that minimizes the energy of interaction between the micelle and its environment. Liquids that contain large numbers of suspended micelles are referred to as EMULSIONS.
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.
The quality or state of being wettable or the degree to which something can be wet. This is also the ability of any solid surface to be wetted when in contact with a liquid whose surface tension is reduced so that the liquid spreads over the surface of the solid.
The spatial arrangement of the atoms of a nucleic acid or polynucleotide that results in its characteristic 3-dimensional shape.
Organs and other anatomical structures of non-human vertebrate and invertebrate animals.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
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.
Any normal or abnormal coloring matter in PLANTS; ANIMALS or micro-organisms.
The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
Coloration or discoloration of a part by a pigment.
The thermodynamic interaction between a substance and WATER.
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
Theoretical representations that simulate the behavior or activity of chemical processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
The preparation, mixing, and assembling of a drug. (From Remington, The Science and Practice of Pharmacy, 19th ed, p1814)
Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th 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.
Binary compounds of oxygen containing the anion O(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides.
Platinum. A heavy, soft, whitish metal, resembling tin, atomic number 78, atomic weight 195.09, symbol Pt. (From Dorland, 28th ed) It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as "alutiae".
A metallic element that has the atomic number 13, atomic symbol Al, and atomic weight 26.98.
Two-phase systems in which one is uniformly dispersed in another as particles small enough so they cannot be filtered or will not settle out. The dispersing or continuous phase or medium envelops the particles of the discontinuous phase. All three states of matter can form colloids among each other.
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
A highly caustic substance that is used to neutralize acids and make sodium salts. (From Merck Index, 11th ed)
Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.
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.
Methods of creating machines and devices.
The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.
Inorganic or organic compounds containing trivalent iron.
The property of emitting radiation while being irradiated. The radiation emitted is usually of longer wavelength than that incident or absorbed, e.g., a substance can be irradiated with invisible radiation and emit visible light. X-ray fluorescence is used in diagnosis.
Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.

Signaling through Raf-1 in the neovasculature and target validation by nanoparticles. (1/2196)

A recent study demonstrated that vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) activate Raf-1 kinase in an experimental neovasculature system. The study showed that bFGF and VEGF activate p21-activated protein kinase-1 (PAK-1) and Src kinase, respectively. PAK-1 and Src kinases phosphorylate specific serine and tyrosine residues within the activation loop of Raf-1 kinase. Their findings further suggest that phosphorylation at these sites protects endothelial cells from apoptosis induced by both intrinsic and extrinsic factors. The tumor neovasculature provides specific molecular markers or "zip codes". This group of investigators has previously shown that nanosphere-aided targeting of the neovasculature with mutant Raf-1 causes regression of the tumor vasculature. Thus, nanoparticles coated with "zip code"-specific homing biomolecules may be useful for delivering anti-angiogenic molecules that can induce tumor regression.  (+info)

Reducing activity of colloidal platinum nanoparticles for hydrogen peroxide, 2,2-diphenyl-1-picrylhydrazyl radical and 2,6-dichlorophenol indophenol. (2/2196)

Shimizu and Tsuji established a method of preparing colloidal platinum nanoparticles, whose average size is 2 nm, by ethanol reduction of H(2)PtCl(6) in the absence of protective agents for the particles. Platinum nanoparticles have negative surface potential and are stably suspended from an electric repulsion between them. The platinum nanoparticles reduced hydrogen peroxide and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) below 0.1 ppm. It is necessary to use higher concentration of platinum nanoparticles for the reduction of 2,6-dichlorophenol indophenol (DCIP) than that of hydrogen peroxide and 2,2-diphenyl-1-picrylhydrazyl radical, because reoxidation of DCIPH(2) (reduced) by oxygen was not negligible under our experimental conditions. These results indicate that electrons on platinum nanoparticles produced by the method of Shimizu and Tsuji can reduce hydrogen peroxide, DPPH radical or DCIP transferring electrons.  (+info)

Homogeneous detection of unamplified genomic DNA sequences based on colorimetric scatter of gold nanoparticle probes. (3/2196)

Nucleic acid diagnostics is dominated by fluorescence-based assays that use complex and expensive enzyme-based target or signal-amplification procedures. Many clinical diagnostic applications will require simpler, inexpensive assays that can be done in a screening mode. We have developed a 'spot-and-read' colorimetric detection method for identifying nucleic acid sequences based on the distance-dependent optical properties of gold nanoparticles. In this assay, nucleic acid targets are recognized by DNA-modified gold probes, which undergo a color change that is visually detectable when the solutions are spotted onto an illuminated glass waveguide. This scatter-based method enables detection of zeptomole quantities of nucleic acid targets without target or signal amplification when coupled to an improved hybridization method that facilitates probe-target binding in a homogeneous format. In comparison to a previously reported absorbance-based method, this method increases detection sensitivity by over four orders of magnitude. We have applied this method to the rapid detection of mecA in methicillin-resistant Staphylococcus aureus genomic DNA samples.  (+info)

Oligonucleotide-displaced organic monolayer-protected silver nanoparticles and enhanced luminescence of their salted aggregates. (4/2196)

N-(2-mercaptopropionyl)glycine (tiopronin) monolayer-protected silver particles were partially displaced by single-stranded oligonucleotides through ligand exchanges. The oligonucleotide-displaced particles could be hybridized with complementary fluorophore-labeled oligonucleotides. Both the oligonucleotide-displaced and hybridized particles could be aggregated by electrostatic interactions with salt in buffer solution, and the aggregates displayed enhanced luminescence from fluorophores. This result suggests the possible application of surface-enhanced fluorescence from metallic nanoparticle aggregation for DNA detection.  (+info)

Nanostructure of cationic lipid-oligonucleotide complexes. (5/2196)

Complexes (lipoplexes) between cationic liposomes and single-strand oligodeoxynucleotides (ODN) are potential delivery systems for antisense therapy. The nanometer-scale morphology of these assemblies is relevant to their transfection efficiency. In this work the monocationic lipid dioleoyloxytrimethylammoniumpropane, the neutral "helper" lipid cholesterol, and an 18-mer anti-bcl2 ODN were combined at different ratios. The lipoplexes formed were characterized for the quantity of ODN bound, for the degree of lipid mixing, and for their size. The nanostructure of the system was examined by cryogenic-temperature transmission electron microscopy, augmented by small-angle x-ray scattering. Addition of ODN to cationic liposomes induced both liposome aggregation and the formation of a novel condensed lamellar phase. This phase is proposed to be stabilized by anionic single-strand ODN molecules intercalated between cationic bilayers. The proportion of cholesterol present apparently did not affect the nature of lipoplex microstructure, but changed the interlamellar spacing.  (+info)

A nanosensor for transmembrane capture and identification of single nucleic Acid molecules. (6/2196)

We have engineered a nanosensor for sequence-specific detection of single nucleic acid molecules across a lipid bilayer. The sensor is composed of a protein channel nanopore (alpha-hemolysin) housing a DNA probe with an avidin anchor at the 5' end and a nucleotide sequence designed to noncovalently bind a specific single-stranded oligonucleotide at the 3' end. The 3' end of the DNA probe is driven to the opposite side of the pore by an applied electric potential, where it can specifically bind to oligonucleotides. Reversal of the applied potential withdraws the probe from the pore, dissociating it from a bound oligonucleotide. The time required for dissociation of the probe-oligonucleotide duplex under this force yields identifying characteristics of the oligonucleotide. We demonstrate transmembrane detection of individual oligonucleotides, discriminate between molecules differing by a single nucleotide, and investigate the relationship between dissociation time and hybridization energy of the probe and analyte molecules. The detection method presented in this article is a candidate for in vivo single-molecule detection and, through parallelization in a synthetic device, for genotyping and global transcription profiling from small samples.  (+info)

Rapid double 8-nm steps by a kinesin mutant. (7/2196)

The mechanism by which conventional kinesin walks along microtubules is poorly understood, but may involve alternate binding to the microtubule and hydrolysis of ATP by the two heads. Here we report a single amino-acid change that affects stepping by the motor. Under low force or low ATP concentration, the motor moves by successive 8-nm steps in single-motor laser-trap assays, indicating that the mutation does not alter the basic mechanism of kinesin walking. Remarkably, under high force, the mutant motor takes successive 16-nm displacements that can be resolved into rapid double 8-nm steps with a short dwell between steps, followed by a longer dwell. The alternating short and long dwells under high force demonstrate that the motor stepping mechanism is inherently asymmetric, revealing an asymmetric phase in the kinesin walking cycle. Our findings support an asymmetric two-headed walking model for kinesin, with cooperative interactions between the two heads. The sensitivity of the 16-nm displacements to nucleotide and load raises the possibility that ADP release is a force-producing event of the kinesin cycle.  (+info)

Nanometer size diesel exhaust particles are selectively toxic to dopaminergic neurons: the role of microglia, phagocytosis, and NADPH oxidase. (8/2196)

The contributing role of environmental factors to the development of Parkinson's disease has become increasingly evident. We report that mesencephalic neuron-glia cultures treated with diesel exhaust particles (DEP; 0.22 microM) (5-50 microg/ml) resulted in a dose-dependent decrease in dopaminergic (DA) neurons, as determined by DA-uptake assay and tyrosine-hydroxylase immunocytochemistry (ICC). The selective toxicity of DEP for DA neurons was demonstrated by the lack of DEP effect on both GABA uptake and Neu-N immunoreactive cell number. The critical role of microglia was demonstrated by the failure of neuron-enriched cultures to exhibit DEP-induced DA neurotoxicity, where DEP-induced DA neuron death was reinstated with the addition of microglia to neuron-enriched cultures. OX-42 ICC staining of DEP treated neuron-glia cultures revealed changes in microglia morphology indicative of activation. Intracellular reactive oxygen species and superoxide were produced from enriched-microglia cultures in response to DEP. Neuron-glia cultures from NADPH oxidase deficient (PHOX-/-) mice were insensitive to DEP neurotoxicity when compared with control mice (PHOX+/+). Cytochalasin D inhibited DEP-induced superoxide production in enriched-microglia cultures, implying that DEP must be phagocytized by microglia to produce superoxide. Together, these in vitro data indicate that DEP selectively damages DA neurons through the phagocytic activation of microglial NADPH oxidase and consequent oxidative insult.  (+info)

Nanopillars is an emerging technology within the field of nanostructures. Nanopillars are pillar shaped nanostructures approximately 10 nanometers in diameter that can be grouped together in lattice like arrays. They are a type of metamaterial, which means that nanopillars get their attributes from being grouped into artificially designed structures and not their natural properties. Nanopillars set themselves apart from other nanostructures due to their unique shape. Each nanopillar has a pillar shape at the bottom and a tapered pointy end on top. This shape in combination with nanopillars ability to be grouped together exhibits many useful properties. Nanopillars have many applications including efficient solar panels, high resolution analysis, and antibacterial surfaces. Due to their tapered ends, nanopillars are very efficient at capturing light. Solar collector surfaces coated with nanopillars are three times as efficient as nanowire solar cells. Less material is needed to build a solar ...
Molecular self-assembly is the process by which molecules adopt a defined arrangement without guidance or management from an outside source. There are two types of self-assembly. These are intramolecular self-assembly and intermolecular self-assembly. Commonly, the term molecular self-assembly refers to intermolecular self-assembly, while the intramolecular analog is more commonly called folding. Molecular self-assembly is a key concept in supramolecular chemistry. This is because assembly of molecules in such systems is directed through noncovalent interactions (e.g., hydrogen bonding, metal coordination, hydrophobic forces, van der Waals forces, π-π interactions, and/or electrostatic) as well as electromagnetic interactions. Common examples include the formation of micelles, vesicles, liquid crystal phases, and Langmuir monolayers by surfactant molecules. Further examples of supramolecular assemblies demonstrate that a variety of different shapes and sizes can be obtained using molecular ...
The scope of this thesis is the synthesis of nanostructured materials, their functionalization and use for optical lactate biosensing applications. Rapid detection of L-lactate is important in many applications in the clinical sector, in the food industry, or in biotechnology. The formation of enzyme loaded nanostructured materials is a promising approach to obtain performing, reliable and stable enzyme-based optical biosensors. Two different sensing schemes are proposed: the development of lactate-responsive films (pathches) and the development of a microparticle based lactate detection system. The content of this work can be divided in three main tasks: (i) the synthesis of nanostructured support materials for enzyme immobilization, (ii) the functionalization of these materials towards lactate detection, and (iii) the assessment of the performance and sensitivity of these enzyme-loaded films and particles for biosensor applications. The design of porous supports aims at providing large surface ...
Modification of carbon nanostructures by different chemical elements opens an opportunity for synthesis of materials of a new generation for different applications. Filling carbon nanotubes with one or other element will allow for conferring different mechanical, electrical, magnetic and other physical and chemical properties on the nanotubes. This work demonstrates a possibility to produce such materials by the new proposed by authors method for synthesis of carbon nanostructures using arc evaporation of materials in liquid medium. The possibility to produce chlorine-filled nanostructures is illustrated by the example of synthesis in chlorine-containing media. The possibility to produce chlorine-filled carbon nanostructures by the arc synthesis of nanostructures in the liquid phase has been demonstrated. The proposed method may be one of the most efficient methods for synthesis of carbon nanostructures.
Modification of carbon nanostructures by different chemical elements opens an opportunity for synthesis of materials of a new generation for different applications. Filling carbon nanotubes with one or other element will allow for conferring different mechanical, electrical, magnetic and other physical and chemical properties on the nanotubes. This work demonstrates a possibility to produce such materials by the new proposed by authors method for synthesis of carbon nanostructures using arc evaporation of materials in liquid medium. The possibility to produce chlorine-filled nanostructures is illustrated by the example of synthesis in chlorine-containing media. The possibility to produce chlorine-filled carbon nanostructures by the arc synthesis of nanostructures in the liquid phase has been demonstrated. The proposed method may be one of the most efficient methods for synthesis of carbon nanostructures.
Nanosponges are a novel class of hyper-crosslinked polymer based colloidal structures consisting of solid nanoparticles with colloidal sizes and nanosized cavities. These nano-sized colloidal carriers have been recently developed and proposed for drug delivery, since their use can solubilize poorly water-soluble drugs and provide prolonged release as well as improve a drugs bioavailability by modifying the pharmacokinetic parameters of actives. Development of nanosponges as drug delivery systems, with special reference to cyclodextrin based nanosponges, is presented in this article. In the current review, attempts have been made to illustrate the features of cyclodextrin based nanosponges and their applications in pharmaceutical formulations. Special emphasis has been placed on discussing the methods of preparation, characterization techniques and applications of these novel drug delivery carriers for therapeutic purposes. Nanosponges can be referred to as solid porous particles having a ...
In this study, double-sided polymer surface nanostructures are fabricated using twice nanoimprint lithography and metal deposition technique. We perform electrical property measurement on these double-sided surface nanostructures. Open-circuit voltage and short-circuit current of the as-prepared samples with double-sided surface nanostructures and conductive electrode are recorded using an oscilloscope with applying different external force. The measurements are carried out at room temperature. We find that the intensity of open-circuit voltage and short-circuit current for the double-sided surface nanostructures depends strongly on the sizes, shapes, and arrangements of nanostructures and pressure force. The strongest electrical property can be observed in the hexagon nanopillar arrays with the diameter of about 400 nm containing sub-50-nm resolution sharp structures at the force of about 40 N. We discuss the physical mechanisms responsible for these interesting research findings. The experimental
The nanosponges look like red blood cells, and therefore serve as red blood cell decoys that collect the toxins. The nanosponges absorb damaging toxins and divert them away from their cellular targets. The nanosponges had a half-life of 40 hours in the researchers experiments in mice. Eventually the liver safely metabolized both the nanosponges and the sequestered toxins, with the liver incurring no discernible damage.. Each nanosponge has a diameter of approximately 85 nanometers and is made of a biocompatible polymer core wrapped in segments of red blood cells membranes.. Zhangs team separates the red blood cells from a small sample of blood using a centrifuge and then puts the cells into a solution that causes them to swell and burst, releasing hemoglobin and leaving RBC skins behind. The skins are then mixed with the ball-shaped nanoparticles until they are coated with a red blood cell membrane.. Just one red blood cell membrane can make thousands of nanosponges, which are 3,000 times ...
TY - JOUR. T1 - Formation and helicity control of ssDNA templated porphyrin nanoassemblies. AU - Sargsyan, Gevorg. AU - Schatz, Alexandra A.. AU - Kubelka, Jan. AU - Balaz, Milan. PY - 2013/1/3. Y1 - 2013/1/3. N2 - We report the formation of left- (M-helix) and right-handed (P-helix) nanoassemblies of a porphyrin-diaminopurine conjugate (Por-DAP) templated by a single stranded oligodeoxythymidine (dT40) via directional hydrogen bonding. The supramolecular helicity can be controlled by the ionic strength, Por-DAP: dT40 ratio, and annealing rate.. AB - We report the formation of left- (M-helix) and right-handed (P-helix) nanoassemblies of a porphyrin-diaminopurine conjugate (Por-DAP) templated by a single stranded oligodeoxythymidine (dT40) via directional hydrogen bonding. The supramolecular helicity can be controlled by the ionic strength, Por-DAP: dT40 ratio, and annealing rate.. UR - http://www.scopus.com/inward/record.url?scp=84872082733&partnerID=8YFLogxK. UR - ...
In this work, we report the optical and thermal properties of Cu(BTC)·3H2O (BTC = 1,3,5-benzenetricarboxylic acid) and Zn(ADC)·DMSO (ADC = 9,10- anthracenedicarboxylic acid, DMSO = dimethyl sulfoxide) metal-organic frameworks (MOFs) micro/nanopillars. The morphologies of MOFs on surfaces are most in the form of micro/nanopillars that were vertically oriented on the surface. The size and morphology of the pillars depend on the evaporation time, concentration, solvent, substrate, and starting volume of solutions. The crystal structures of the nanopillars and micropillars are the same, confirmed by powder XRD. Zn(ADC)·DMSO pillars have a strong blue fluorescence. Most of ADC in the pillars are in the form of monomers, which is different from ADC in the solid powder.
The formation of GaSb nanopillars by low energy ion sputtering is studied in real-time by spectroscopic Mueller matrix ellipsometry, from the initial formation in the smooth substrate until nanopillars with a height of 200 - 300 nm are formed. As the nanopillar height increased above 100 nm, coupling between orthogonal polarization modes was observed. Ex situ angle resolved Mueller polarimetry measurements revealed a 180° azimuth rotation symmetry in the off-diagonal Mueller elements, which can be explained by a biaxial material with different dielectric functions εx and εy in a plane parallel to the substrate. This polarization coupling can be caused by a tendency for local direction dependent alignment of the pillars, and such a tendency is confirmed by scanning electron microscopy. Such observations have not been made for GaSb nanopillars shorter than 100 nm, which have optical properties that can be modeled as a uniaxial effective medium.. ©2011 Optical Society of America. Full Article , ...
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Fingerprint Dive into the research topics of Design, simulation, and experimental demonstration of self-assembled DNA nanostructures and motors. Together they form a unique fingerprint. ...
2017 Wiley-Blackwell. This is the final published version of the following article: Auvinen, Henni & Zhang, Hongbo & Nonappa & Kopilow, Alisa & Niemelä, Elina H. & Nummelin, Sami & Correia, Alexandra & Santos, Hélder A. & Linko, Veikko & Kostiainen, Mauri A. 2017. Protein Coating of DNA Nanostructures for Enhanced Stability and Immunocompatibility. Advanced Healthcare Materials. Volume 6, Issue 18. 1700692. ISSN 2192-2640 (printed). DOI: 10.1002/adhm.201700692, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/adhm.201700692/abstract. This version is published with permission from Wiley under CC BY-NC 3.0 license https://creativecommons.org/licenses/by-nc/3.0 ...
The tantalizing prospect of harnessing the unique properties of graphene crumpled nanostructures continues to fuel tremendous interest in energy storage and harvesting applications. However, the paper ball-like, hard texture, and closed-sphere morphology of current 3D graphitic nanostructure production not only constricts the conductive pathways but also limits the accessible surface area. Here, we report new insights into electrohydrodynamically-generated droplets as colloidal nanoreactors in that the stimuli-responsive nature of reduced graphene oxide can lead to the formation of crumpled nanostructures with a combination of open structures and doubly curved, saddle-shaped edges. In particular, the crumpled nanostructures dynamically adapt to non-spherical, polyhedral shapes under continuous deposition, ultimately assembling into foam-like microstructures with a highly accessible surface area and spatially interconnected transport pathways. The implementation of such crumpled nanostructures as three
This book displays fundamental aspects of the various ranges of nanostructured materials for energy applications. Topics include recent trends in nanomaterials for sustainable energy, advances in flexible supercapacitors, biomass-derived nanomaterials, and more.
In previous chapters, the different types of nanoparticles, selection of resin matrix and nanoparticles, processing of nanomaterials, and morphological characterization of polymer nanostructured materials were discussed. In this chapter, the properties ...
Nanoscale topographies and chemical patterns can be used as synthetic cell interfaces with a range of applications including study and control of cellular processes. Herein, we describe the fabrication of high aspect ratio nanostructures using electron beam lithography in the epoxy-based polymer SU-8. We show how nanostructure geometry, position and fluorescent properties can be tuned, allowing flexible device design. Further, thiol-epoxide reactions were developed to give effective and specific modification of SU-8 surface chemistry. SU-8 nanostructures were made directly on glass cover slips, enabling the use of high resolution optical techniques such as live-cell confocal, total internal reflection and 3D structured illumination microscopy to investigate cell interactions with the nanostructures. Details of cell adherence and spreading, plasma membrane conformation and actin organization in response to high aspect ratio nanopillars and nanolines were investigated. The versatile structural and ...
University of Crete. E-Locus Institutional Repository.PhD thesis.2015 . Creators: Μανιαδάκη, Αριστέα Ε.. Contributors: Κοπιδάκης, Γεώργιος.Τα νανοδομημένα υλικά με βάση τον άνθρακα (Carbon-based Nanostructured Materials - CNMs) παρουσιάζουν θεμελιώδες ενδιαφέρον και είναι καλοί υποψήφιοι για πολυάριθμες εφαρμογές στην παραγωγή, αποθήκευση και χρήση του υδρογόνου σε εφαρμογές καθαρής ενέργειας. Εκτεταμένες έρευνες στους νανοσωλήνες άνθρακα, στα φουλερένια και στο γραφένιο έχουν βελτιώσει δραματικά τις γνώσεις μας σχετικά με τα υλικά αυτά. Ωστόσο, μια πληθώρα απο άλλα CNMs προσφέρουν ευκαιρίες για τεχνολογική
Purchase Micro and Nanofabrication Using Self-Assembled Biological Nanostructures - 1st Edition. Print Book & E-Book. ISBN 9780323296427, 9780323296526
Block Copolymer Crosslinked Nanoassemblies Co-entrapping Hydrophobic Drugs and Lipophilic Polymer Additives Block copolymer crosslinked nanoassemblies (CNAs) were synth..
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Page contains details about silicon-tin-cerium-iron-aluminum-titanium alloy nanofibers-filled-carbon black loaded PVDF nanostructured material . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Page contains details about graphene-Bi2Te2Se nanostructured material . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Biology serves as a major inspiration for the assembly of ordered structures at the nanoscale. Two main directions for the development of bio-inspired nanomaterials are based either on the use of protein and peptide building blocks or, alternatively, on the use of DNA. Polypeptide structures have the advantage of structural integrity and robustness while nucleic acids have the advantage of specific molecular recognition between complementary bases.. Our group has been extensively involved in the study of molecular self-assembly by extremely short peptide fragments. We demonstrated in 2003 that simple dipeptides contain all the molecular information needed to form ordered nanostructures [1]. Furthermore, peptide assemblies have been shown to exhibit remarkable physical properties including high mechanical rigidity, luminescence, piezoelectricity, and semiconductivity [2]. The dipeptide assemblies act as supramolecular polymers including a clear phase transition governed by Ostwalds rule of ...
Nanostructuring surfaces in order to improve the quality of determinations, in terms of detection limit and signal-to-noise ratio, had received a great attention in the last years. At this effect, a potentiometric for the determination of lactate, based on a nanostructured (ND) Si4N3 surface, is presented here. The potentiometric sensor developed is an electrolyte¿membrane¿insulator¿semiconductor (EMIS). The surface was first modified by a polyacrylic acid (PAA) layer, deposited by plasma enhanced chemical vapor deposition (PECVD), that can covalently link to the NH2 groups of the lactate dehydrogenase. Secondly, the nanostructures were formed on the surface by colloidal lithography. The obtained nanostructured surface was characterized. The stability of the biosensor in aqueous media was investigated obtaining a sensitivity of 49.7mV per decade. The detection limit for the determination of lactate was 2×10-7 M, with a linear range up to 10-5 M. The intra- and inter-electrode standard ...
Nanostructured materials are promising compounds that offer new opportunities as sensing platforms for the detection of biomolecules. Having micrometer-scale length and nanometer-scale diameters, nanomaterials can be manipulated with current nanofabrication methods, as well as self-assembly techniques, to fabricate nanoscale bio-sensing devices. Nanostructured materials possess extraordinary physical, mechanical, electrical, thermal and multifunctional properties. Such unique properties advocate their use as biomimetic membranes to immobilize and modify biomolecules on the surface of nanoparticles. Alignment, uniform dispersion, selective growth and diameter control are general parameters which play critical roles in the successful integration of nanostructures for the fabrication of bioelectronic sensing devices. In this review, we focus on different types and aspects of nanomaterials, including their synthesis, properties, conjugation with biomolecules and their application in the construction of
Discovering new anticancer drugs and screening their efficacy requires a huge amount of resources and time-consuming processes. The development of fast, sensitive, and nondestructive methods for the in vitro and in vivo detection of anticancer drugs effects and action mechanisms have been done to reduce the time and resources required to discover new anticancer drugs. For the in vitro and in vivo detection of the efficiency, distribution, and action mechanism of anticancer drugs, the applications of electrochemical techniques such as electrochemical cell chips and optical techniques such as surface-enhanced Raman spectroscopy (SERS) have been developed based on the nanostructured surface. Research focused on electrochemical cell chips and the SERS technique have been reviewed here; electrochemical cell chips based on nanostructured surfaces have been developed for the in vitro detection of cell viability and the evaluation of the effects of anticancer drugs, which showed the high capability to evaluate
The study reports the synthesis of cobalt oxide (Co3O4) nanostructures and their application in enzyme free electrochemical sensing of glucose. The synthesized nanostructures were elaborately characterized via number of analytical techniques including scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The as-synthesized nanostructures of Co3O4 were found to exhibited nanodisc like morphology with the size dimension in range of 300-500 nm. The obtained morphological features were evaluated for their electrochemical potential towards oxidation of glucose which enabled development of sensitive (27.33 mu A mM(-1) cm(-2)), and stable enzyme free glucose sensor. In addition, the developed sensor showed excellent linearity (r(2)=0.9995), wide detection range (0.5-5.0 mM), lower detection limit (0.8 mu M) and extreme selectivity towards glucose in the presence of common interferents like dopamine (DP), ...
DNA nanostructures and hybrid DNA-protein materials are attractive solutions to many applications in biotechnology and material science because of their controllable molecule-level features. Critical to a complete description and characterization of these technologies is the quantification of binding affinity between DNA nanostructures and small molecules relevant to the application at hand. This protocols chapter described a series of experimental and in silico analyses that can be used to described and quantify ligand binding interactions between DNA nanostructures (DNA DX tiles), short double stranded DNA fragments, and arbitrary small molecules. The described methods include microscale thermophoresis, ligand completion assays, circular dichroism spectroscopy, and AutoDock simulations. The protocols use organophosphates and model chemical nerve agents as examples, but the methods described here are broadly applicable. ...
Journal of Nanomaterials is a peer-reviewed, Open Access journal that aims to bring science and applications together on nanoscale and nanostructured materials with emphasis on synthesis, processing, characterization, and applications of materials containing true nanosize dimensions or nanostructures that enable novel/enhanced properties or functions. It is directed at both academic researchers and practicing engineers. Journal of Nanomaterials will highlight the continued growth and new challenges in nanomaterials science, engineering, and nanotechnology, both for application development and for basic research. All papers should emphasize original results relating to experimental, theoretical, computational, and/or applications of nanomaterials ranging from hard (inorganic) materials, through soft (polymeric and biological) materials, to hybrid materials or nanocomposites.
Critical biological processes such as energy generation and signal transduction are driven by the flow of electrons and ions across the membranes of living cells. As a result, there is substantial interest in creating nanostructured materials that control transport of these charged species across biomembranes. The recent advances in the synthesis of de novo and protein nanostructures for transmembrane ion and electron transport and the mechanistic understanding underlying this transport are described. Moreover, this body of work highlights the promise such nanostructures hold for directing transmembrane transport of charged species as well as challenges that must be overcome to realize that potential. ...
We present results on the single step fabrication of autocentered nanopillars with surrounding circular rim. This particular 3-dimensional shape is created by the energy density distribution of incident and backscattered electrons and reflects the dual behavior of PMMA as positive and negative e-beam resist. Structures with 80 nm rim diameter and 20 nm wide nanopillars could be realized. We could show that the characteristic dimensions of the structures can be varied almost independently by playing with the exposure parameters. Qualitative and quantitative analysis of the structure shapes are described and several fields of application are proposed.. Keywords: e-Beam ; Nanopillars ; Autocentered ; Pmma ; Nanostructures ; Field Emitters. ...
The study describes the application of oxidation resistant copper nanostructures as an efficient heterogeneous catalyst for the treatment of organic dye containing waste waters. Copper nanostructures were synthesized in an aqueous environment using modified surfactant assisted chemical reduction route. The synthesized nanostructures have been characterized by UV-Vis, Fourier transform infrared spectroscopy FTIR spectroscopy, Atomic force microscopy (AFM), Scanning Electron Microscopy (SEM), and X-ray diffractometry (XRD). These surfactant capped Cu nanostructures have been used as a heterogeneous catalyst for the comparative reductive degradation of methyl orange (MO) in the presence of sodium borohydride (NaBH|sub|4|/sub|) used as a potential reductant. Copper nanoparticles (Cu NPs) were found to be more efficient compared to copper nanorods (Cu NRds) with the degradation reaction obeying pseudofirst order reaction kinetics. Shape dependent catalytic efficiency was further evaluated from activation
Welcome to Lab. of Multiferroic and Photovoltaic Nanostructures at POSTECH. We are actively doing research in a variety of different topics that involve functional oxides. More specifically, we focus our research activity on the following three major areas: (i) predicting electronic structures and materials properties from first-principles quantum mechanical calculations, (ii) fundamental study of multiferroic materials and their applications to design and fabrication of functional nanostructures, and (iii) solar cells (photo-voltaic) nanostructures. The unique feature and the excellence of our research stem from the fact that Prof. Hyun M. Jang, a group leader, is very strong in fundamental theory (both quantum and statistical mechanics). In Research Page, we will outline three main areas of research which typically represent our ongoing research activities.. ...
As a result of this study, several fabrication methods were developed. One of them utilizes focused ion beam lithography for nanofabrication on multilevel and strongly corrugated surfaces. This process has a great potential for general 3D integration and for micro- and nanofluidics. The same approach enables the fabrication of suspended nanostructures and gives a platform for accurate measurement of material properties and realization of lab-on-a-chip concepts. Another separately developed process is a grayscale lithography that provides a control over the height of patterned features at nanometer scale. It gives an effective way to fabricate miniature diffractive optics components for extreme ultraviolet and soft X-ray radiation. It also allows for new designs and improved performance of photonic grating couplers. Finally, the work shows how atomic layer deposition can be used to tune the operational parameters of photonic components. In particular, the dispersion properties of photonic ...
Nanostructures and Nanomaterials: Characterization and Properties will provide an overview of nanostructures evincing their fascinating properties (mechanical, optical, electromagnetic, chemical, and biological) unseen otherwise. The hierarchical development from nano to macro length scale, and its adoption in nature (biomimicking) will also be discussed. Understanding the change in crystal structure and defects therein as one goes from bulk to nano length scale will be utilized to construct structure-mechanism-property-performance maps. Thermodynamics resulting from the size effects at nano-length scales will also be considered. Structural, phase, microstructural and mechanical characterization techniques will be dealt in detail.. ...
TY - JOUR. T1 - Protein-inspired multilayer nanofilms. T2 - science, technology and medicine. AU - Haynie, Donald T.. AU - Zhang, Ling. AU - Zhao, Wanhua. AU - Rudra, Jai S.. PY - 2006/9/1. Y1 - 2006/9/1. N2 - The field of polypeptide multilayer nanofilm research flourishes where study of protein structure and function shares a border with development of polyelectrolyte multilayers. The soil is fertile for creative input and promises a harvest of interesting results: the structure of a film can be predetermined on a layer-by-layer (LBL) basis, a huge variety of polypeptide sequences can be realized in large quantities by modern methods of synthesis, and the fabrication process is environmentally benign. In electrostatic LBL assembly, multilayer film assembly is driven primarily by coulombic interactions, but hydrophobic interactions and hydrogen bonds also contribute to film formation and stability, the amount depending on polypeptide design. Most peptides suitable for LBL assembly form films ...
CHAMPAIGN, Ill. ? You can think of it as origami ? very high-tech origami.. Researchers at the University of Illinois have developed a technique for fabricating three-dimensional, single-crystalline silicon structures from thin films by coupling photolithography and a self-folding process driven by capillary interactions.. The films, only a few microns thick, offer mechanical bendability that is not possible with thicker pieces of the same material.. This is a completely different approach to making three-dimensional structures, said Ralph G. Nuzzo, the G. L. Clark Professor of Chemistry at Illinois. We are opening a new window into what can be done in self-assembly processes.. Nuzzo is corresponding author of a paper accepted for publication in the Proceedings of the National Academy of Sciences. The paper is to be posted on the journals Early Edition Web site the week of November 23.. As a demonstration of the new capillary-driven, self-assembly process, Nuzzo and colleagues constructed ...
High quality rutile Ti1-xSnxO2 nanofilms were successfully grown in a layer-by-layer mode at a moderately low temperature of 400 °C using pulsed laser deposition (PLD). High solid solubility of up to x = 0.216 has been achieved in the Ti1-xSnxO2 films despite theoretical prediction by Density functional theory (DFT) of large formation energy (∼5.64 eV) required for the substitutional alloy to exist at such high Sn concentration. The resultant films have smooth interfaces and step-terraced surfaces with well controlled stoichiometry and are optically transparent. Sn L3-edge Extended X-ray absorption fine structure (EXAFS) reveals the substitution of Sn4+ in the Ti4+ lattice sites of TiO2. The lattice spacing along [110] increases linearly with increment in x due to substitution of Sn4+ ions in the Ti lattice sites of the Ti1-xSnxO2 films. X-ray photoelectron spectroscopy (XPS) and Rutherford backscattering (RBS) show that Sn is uniformly distributed on the surface and in the bulk of the films. ...
Within this work nanostructured surfaces were generated by immobilization of gold and silver nanoparticles with organosilanes and characterized regarding their suitability as substrates for Surface-enhanced Raman scattering (SERS). Essential knowledge for the optimization of SERS-active nanostructures could be found by experimental invest-igations on the influence of particle size and assembly on the plasmonic properties. Through combined experimental investigations, including spectroscopic and imaging techniques, and electrodynamic simulations of local fields, the plasmonic and nanoscopic properties of particles on surfaces were related to their SERS-properties. The nanostructured surfaces exhibit high and, over a wide range of analyte concentration, stable enhancement factors with high microscopic homogeneity. Therefore immobilized nanostructures are suitable substrates for quantitative SERS. The potential for the use of the nanostructured surfaces in analytical problems was shown in various ...
Advances in Nanomaterials and Processing: Improvement of Luminescent Properties of Phosphor Powders Coated with Nanoscaled SiO|sub|2|/sub| by Atomic Layer Deposition
Numerous models and methods have been employed in the chemistry and physics literature to study the molecular self-assembly process. Some recent reports have described molecular dynamics simulations [5-10], density functional theory [11], kinetic Monte Carlo simulations [12], stochastic models [13], graph theory [14] and mean-field models [15], to name a few. However, the possibility of studying self-assembly by selective retrieval of target information as described above has not been considered in this literature. In fact, the need for such a study seems to be particularly acute for the case of molecular self-assembly. For example, while molecular dynamics simulations should eventually yield reliable statistics on island formation, the simulation times required for the entire state space to be sufficiently sampled are inaccessible with modern computational power. The enormous state space of typical molecular self-assembly models, therefore, provides a barrier to both data collection and data ...
We aim to tackle BBB entry via DNA origami technology, a relatively novel method of using bottom-up fabrication to create complex nanostructures in a single-step reaction. The entire concept of DNA origami is based on the properties of complementary base-pairing. While top-down fabrication methods have been the sole means of creating nanostructures with high levels of complexity for a while, a recently developed algorithm allowed for the creation of arbitrary two-dimensional nanostructures from a single-strand scaffold of DNA. The basic tenants of this algorithm involve approximating the shape by double-helical DNA strands, interlacing the scaffold to form crossovers, binding oligonucleotide staple strands to fortify the structure, and finally, removing the double. Since the development of caDNAno, a program dedicated solely for the construction of DNA nanostructures, groups have been able to design virtually any 3-D origami structure, including bricks, cages, cylinders, etc ...
We aim to tackle BBB entry via DNA origami technology, a relatively novel method of using bottom-up fabrication to create complex nanostructures in a single-step reaction. The entire concept of DNA origami is based on the properties of complementary base-pairing. While top-down fabrication methods have been the sole means of creating nanostructures with high levels of complexity for a while, a recently developed algorithm allowed for the creation of arbitrary two-dimensional nanostructures from a single-strand scaffold of DNA. The basic tenants of this algorithm involve approximating the shape by double-helical DNA strands, interlacing the scaffold to form crossovers, binding oligonucleotide staple strands to fortify the structure, and finally, removing the double. Since the development of caDNAno, a program dedicated solely for the construction of DNA nanostructures, groups have been able to design virtually any 3-D origami structure, including bricks, cages, cylinders, etc ...
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Due to high biocompatibility and tailorable properties, DNA-based nanostructures are widely studied in biosensor and nanomedicine applications. The restriction for using DNA-based nanostructures lie in the purification processes which have low product yield and tedious steps involved. MoS2 nanosheets are chosen to test for its purification efficiency as MoS2 is shown to have discriminating properties between single stranded DNA and double stranded DNA. Adsorption studies of different DNA nanostructures are tested to see the adsorption capacity of MoS2. From the adsorption studies, it has been observed that MoS2 has high affinity to plasmid DNA, so the use of MoS2 as a gene carrier is tested for its delivery performance ...
Alexandru Mihai Grumezescu*, Carmen Mariana Chifiriuc: Prevention of Microbial Biofilms - the Contribution of Micro and Nanostructured Materials, Current Medicinal Chemistry, accepted, 2014.. EDITORIAL. Microbial biofilms are associated with drastically enhanced resistance to most of the antimicrobial agents and with frequent treatment failures, generating the search for novel strategies which can eradicate infections by preventing the persistent colonization of the hospital environment, medical devices or human tissues. Some of the current approaches for fighting biofilms are represented by the development of novel biomaterials with increased resistance to microbial colonization and by the improvement of the current therapeutic solutions with the aid of nano(bio)technology. This special issues includes papers describing the applications of nanotechnology and biomaterials science for the development of improved drug delivery systems and nanostructured surfaces for the prevention and treatment of ...
Highlights from research on different nanocomposites and nanostructures for sensing and other energy related applications will be presented. The synthesized nanostructures and nanocomposites presented here were all obtained using the low temperature (, 100 °C) chemical approach. Nanostructures featured by small foot-print and synthesized by the low temperature aqueous chemical approach allows the utilization of non-conventional solid and soft substrates like e.g. glass, plastic, textile and paper. We here present results from different metal oxide nanostructures employed for chemical sensing and some innovative energy related applications. Efficient sensitive and selective sensing of dopamine, melamine, and glucose are presented as some examples of self-powered sensors utilizing the electrochemical phenomenon i.e. transferring chemical energy into electrical signal. Further the use of nanomaterials for developing selfpowered devices utilizing mechanical ambient energy is presented via ...
Nanotechnology - Nanofabrication: Two very different paths are pursued. One is a top-down strategy of miniaturizing current technologies, while the other is a bottom-up strategy of building ever-more-complex molecular devices atom by atom. Top-down approaches are good for producing structures with long-range order and for making macroscopic connections, while bottom-up approaches are best suited for assembly and establishing short-range order at nanoscale dimensions. The integration of top-down and bottom-up techniques is expected to eventually provide the best combination of tools for nanofabrication. Nanotechnology requires new tools for fabrication and measurement. The most common top-down approach to fabrication involves lithographic patterning techniques using short-wavelength
Nanostructured lipid carriers (NLC) are stable colloidal formulations with notable advantages for drug delivery systems. Thanks to their physicochemical stability, biocompatibility, biodegradability and controlled drug release, they have received increasing attention for the last several years. The aim of the study was to prepare and characterize nanostructured lipid carriers (NLC). Both, the effect of the process parameters and the effect of the preemulsion composition on the NLC properties were investigated. In the work, different type of surfactants (i.e. decyl glucoside, Poloxamer188, Tween 80, sodium cholate) and their combinations were used to stabilize NLC dispersions. Moreover, several kinds of solid lipids (modified beeswax, gliceryl behenate, cetyl palmitate and berry wax) and liquid lipids (caprilic/capric triglyceride and decyl oleate) were applied. An ultrasonication method using a probe type sonicator was used to obtain NLC, and the time and energy of the process were modified ...
Nanostructures on silicon. Coloured scanning electron micrograph (SEM) of nanostructures formed on a silicon surface by a laser beam. This research involves the use of lasers to etch and ablate metal and semiconductor surfaces. The resulting nanostructures can have applications in various forms of electronics and nanotechnology. - Stock Image F016/7927
Increasing interest in commercializing functional nanostructured devices heightened the need for cost effective scale-up manufacturing approaches for nanostructures. Diamond turning using multi-tip single crystal diamond tools is a new promising approach to the fabrication of micro/nano structures. In this paper, a serial of nanometric face cutting trails on copper using multi-tip nanoscale diamond tools has been carried out to indentify the nanomanufacturing capacity of this technique under different cutting conditions. The dependency between processing parameters and the surface integrity of the machined nanostructures are discussed. Moreover, large scale molecular dynamics (MD) nanometric cutting model is developed to simulate the nanostructures generation process. The simulation results well reveals the material removal mechanism and explains why structure defects are more likely to be formed in the cases of large depth of cut and high cutting speed observed in experiments.. ...
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Master in Multicomponent Nanostructured Coatings. Nanofilms, at National University of Science and Technology MISiS in , . View the best master degrees here!
The objectives of this work were to develop versatile and non-destructive fabrication methods for organometallic polymer nanostructures and to explore their properties and potential applications. The system of focus was metal tetraaminophthalocyanine (MTAPc) polymeric nanostructures in the form of ordered nanowires, nanotubes and b nanoflowersb . Template-assisted electropolymerization was adopted as the major preparation protocol for these nanostructures.,br,,br,In the first part of this thesis, organometallic polymer nanowires and nanotubes were fabricated through cyclic voltammetry (CV) electropolymerization on Pt-coated anodic aluminum oxide (AAO) templates. The spectral and elemental information, obtained from studies using UV-vis, Raman and energy dispersive x-ray (EDX) spectroscopies, confirmed the presence of the phthalocyanine frame with the amino substituted structure and the polymeric form. The field emission scanning electron microscopy (FE-SEM) and the transmission electron ...
Optical characterization of anisotropic multicomponent nanostructures is generally not a trivial task, since the relation between a materials structural properties and its permittivity tensor is nonlinear. In this regard, an array of slanted cobalt nanopillars that are conformally coated with few-layer graphene is a particularly challenging object for optical characterization, as it has a complex anisotropic geometry and comprises several materials with different topologies and filling fractions. Normally, a detailed characterization of such complex nanostructures would require a combination of several microscopic and spectroscopic techniques. In this letter, we demonstrate that the important structural parameters of these graphene-coated sculptured thin films can be determined using a fast and simple generalized spectroscopic ellipsometry test combined with an anisotropic Bruggeman effective medium approximation. The graphene coverage as well as structural parameters of nanostructured thin films agree
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To overcome this deficiency, a team led by cfaed Research Group Leader Dr. Thorsten L. Schmidt (Technische Universit t Dresden / Germany) coated several different DNA origami structures with a synthetic polymer. This polymer consists of two segments, a short positively charged segment which electrostatically glues the polymer to the negatively charged DNA nanostructure and a long uncharged polymer chain that covers the entire nanostructure resembling a fur. In their study Block Copolymer Micellization as a Protection Strategy for DNA Origami published in Angewandte Chemie [DOI: 10.1002/anie.201608873] they showed that such DNA nanostructures covered with the polymers were protected against nuclease digestion and low salt conditions. Furthermore they showed that structures functionalized with nanoparticles can be protected by the same mechanism ...
Small metal nanostructures, especially gold and silver nanoparticles, are known for their interesting optical properties caused by plasmonic effects. Molecular plasmonics, a combination of these optically active nanostructures with the molecular world, opens new possibilities for bioanalytics and (bio-) nanophotonics. Isotropic or anisotropic, homogeneous or heterogeneous metal nanoparticles provide a platform for different, highly defined functional units with interesting optical properties such as plasmon waveguides or molecular beacons. Nanohole arrays in metal layers are another promising component for nanophotonics. New photonic materials were realized from combinations of single metal nanoparticles with individual nanoholes in metals. Atomic force microscopic imaging was used to determine the particle location as well as the lateral dimensions and the topography of the resulting structures. Besides ultramicroscopic characterization of the nanoarrangements, such as nanoparticles positioned ...
Nanostructured lipid carriers (NLCs) are drug-delivery systems and they are made out of solid and fluid lipids as a core matrix. It was demonstrated that NLCs uncover a f..
The April 20-24, 2009 Foundations of Nanoscience conference at Snowbird UT provided an interesting look at the wide variety of subfields and applications for nanoscience in thirteen tracks roughly organized into five areas: principles, materials, nanostructures, components and processes (Taxonomy, Quick Reference Guide to Current Research). Many of the nanoscience subfields have been in existence for five to ten years, however the different nanotechnology science and commerical efforts are still fairly isolated (for example, there could be an NNI roadmapping initiative). Nanoscience is largely still at the stage of experimental demos rather than quick advances to commercialization. The diversity of approaches demonstrates creativity and the increasing complexity, refinement and sophistication signals that nanoscience could be moving into a more mature era ...
TY - JOUR. T1 - Synthesis, anion exchange, and delamination of Co-Al layered double hydroxide. T2 - Assembly of the exfoliated nanosheet/polyanion composite films and magneto-optical studies. AU - Liu, Zhaoping. AU - Ma, Renzhi. AU - Osada, Minoru. AU - Iyi, Nobuo. AU - Ebina, Yasuo. AU - Takada, Kazunori. AU - Sasaki, Takayoshi. PY - 2006/4/12. Y1 - 2006/4/12. N2 - This paper describes a systematic study on the synthesis, anion exchange, and delamination of Co-Al layered double hydroxide (LDH), with the aim of achieving fabrication and clarifying the properties of LDH nanosheet/polyanion composite films. Co-Al-CO3 LDH hexagonal platelets of 4 μm in lateral size were synthesized by the urea method under optimized reaction conditions. The as-prepared CO3 2--LDH was converted to Cl-LDH by treating with a NaCl-HCl mixed solution, retaining its high crystallinity and hexagonal platelike morphology. LDHs intercalated with a variety of anions (such as NO3 -, ClO4 -, acetate, lactate, dodecyl sulfate, ...
Nanostructured lipid carriers (NLC) composed of solid and liquid lipids, and surfactants are potentially good colloidal drug carriers. Before NLC can be us
Article Self-organised hybrid nanostructures composed of the array of vertically aligned carbon nanotubes and planar graphene multi-layer. The hybrid carbon nanostructures composed of an array of vertically aligned carbon nanotubes (CNTs) and a self-...
Electrodeposited Au/CoAu multilayered nanowires are materials with alternating layers of Au and CoAu in a wire where the layer thickness and wire diameter are nanometer size. They can be used for different applications. For example, the wires may exhibit giant magnetoresistance (GMR), a change in the materials resistance with a magnetic field, having applications as a sensor material for microdevices. If Co is etched from CoAu nanowires, rough, porous gold nanostructures will be left behind, which could be used as novel catalysts. In this study, the electrodeposition of Au/CoAu multilayered nanowires and nanotubes in nanoporous templates was explored from a non-cyanide electrolyte. The multilayers were deposited with a pulse current control and the template pore size played an important role in determining whether nanowires or nanotubes were formed. The magnetic and magnetoresistive properties of Au/CoAu multilayered nanostructures were examined. Au/CoAu multilayered thin films exhibited both normal and
Three types of CuO nanostructuresâ€the nanorod, nanofiber, and nanoparticleâ€have been grown by using a self-catalytic growth process at 400, 500, and 600 °C, respectively. Field-emission (FE) properties of the CuO nanostructures were investigated. The results indicated that the FE current was significantly affected by the morphologies of the CuO samples. Typical turn-on voltage for the CuO nanofiber array was detected at about 6â€7 V/μm with an emission area of 1 mm[sup 2]. Based on Fowlerâ€Nordheim plot, the values of work function for the nanofiber array were estimated in ranges of 0.56 to 2.62 and 0.30 to 1.39 eV from a two-stage linearity plot. X-ray photoelectron spectroscopy analysis showed no obvious changes in chemical composition of the nanofiber array before and after FE tests. According to the analyses, the highly ordered CuO nanofiber array can be a promising candidate for FE emitters. © 2003 American Institute of Physics ...
Any activities will leave the download inelastic light scattering of semiconductor nanostructures: fundamentals to sharp of short systems. man of 10000 dialects. You may cease quotients saying this download inelastic light scattering of semiconductor nanostructures: fundamentals.
Shadow Mask assisted Molecular Beam Epitaxy (SMMBE) is a technique enabling selected area epitaxy of semiconductor heterostructures through shadow masks. The objective of this work was the development of the SMMBE technique for the reliable fabrication of compound semiconductor nanostructures of high structural and optical quality. In order to accomplish this, technological processes have been developed and optimized. This, in combination with model calculations of the basic kinetic growth processes has enabled the fabrication of high quality quantum structures. A high spatial precision and control of the incidence regions of the molecular beams during the SMMBE process are required for the fabrication of nanostructures. One of the technological developments to this effect, which has substantially enhanced the versatility of SMMBE, is the introduction of a new type of freestanding shadow masks: Growth through such a mask with different incidence angles of the molecular beams is equivalent to employing
Nanofabrication has the power to impact a vast number of academic fields and see immediate and powerful changes in industries such as hospitals and health care, right through to car manufacturing and food production. The expertise at MCN is particularly relevant in the application areas of energy, biosensors, microfluidics and nanofluidics, nanomedicine and drug delivery, Micro Electro Mechanical Systems (MEMS), optics and medical bionics. We have highlighted projects in each of these areas in a series of case studies, while we also showcase some of the exciting projects taking place at our ANFF Victoria partner nodes. We are always looking to expand our library of MCN case studies so, if you are an MCN or ANFF Victoria user and would like to highlight your research, we invite you to submit a case study to us at [email protected] using the MCN case study template. ...
Significance of postgrowth processing of ZnO nanostructures on antibacterial activity against gram-positive and gram-negative bacteria Shahid Mehmood,1 Malik A Rehman,1 Hammad Ismail,2 Bushra Mirza,2 Arshad S Bhatti11Center for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, 2Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, PakistanAbstract: In this work, we highlighted the effect of surface modifications of one-dimensional (1D) ZnO nanostructures (NSs) grown by the vaporâ solid mechanism on their antibacterial activity. Two sets of ZnO NSs were modified separately â one set was modified by annealing in an Ar environment, and the second set was modified in O2 plasma. Annealing in Ar below 800°C resulted in a compressed lattice, which was due to removal of Zn interstitials and increased O vacancies. Annealing above 1,000°C caused the formation of a new prominent phase, Zn2SiO4. Plasma oxidation of the
In one aspect, the present invention is directed to a thermally responsive AB diblock copolymer prepared by RAFT polymerization wherein the diblock copolymer comprises poly(N-(3-aminopropyl)methacrylamide hydrochloride)-block-(N-isopropylacrylamide). Nanostructures of the thermally responsive diblock copolymer are formed by molecularly dissolving the diblock copolymer in aqueous solution at room temperature; and increasing the solution temperature to form nanostructures, for example vesicles or micelles. The first RAFT polymerization of an unprotected amino acid based monomer directly in water is also disclosed. The present invention also provides a method of forming shell cross-linked vesicles by adding a RAFT synthesized anionic homopolymer to a solution of the thermally responsive diblock copolymer. A method of forming interpolyelectrolyte complexed micelles or vesicles is also disclosed, the method comprising preparing by sequential aqueous RAFT polymerization a block copolymer comprised of N,N,
Researchers from TU Wien have discovered a novel way to fabricate pure gold nanostructures using an additive direct-write lithography technique. An electron beam is used to turn an auriferous organic compound into pure gold. This new technique can now be used to create nanostructures, which are needed for many applications in electronics and sensor technology. Just like with a 3-D printer on ...
Under one aspect, a plurality of silicon nanostructures is provided. Each of the silicon nanostructures includes a length and a cross-section, the cross-section being substantially constant along the
摘要 + :(浏览:1357次) , 请注意:下载全文可能需要登录或支付相关费用. Advanced micro/nanofabrication of functional materials and structures with various dimensions represents a key research topic in modern nanoscience and technology and becomes critically important for numerous emerging technologies such as nanoelectronics, nanophotonics and micro/nanoelectromechanical systems. This review systematically explores the non-conventional material processing approaches in fabricating nanomaterials and micro/nanostructures of various dimensions which are challenging to be fabricated via conventional approaches. Research efforts are focused on laser-based techniques for the growth and fabrication of one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) nanomaterials and micro/nanostructures. The following research topics are covered, including: 1) laser-assisted chemical vapor deposition (CVD) for highly efficient growth and integration of 1D nanomaterial of ...
Deoxyribose nucleic acid (DNA) origami nanotechnology is a recently developed self-assembly process for design and fabrication of complex three-dimensional (3D) nanostructures using DNA as a functional material. This paper reviews our recent progress in applying DNA origami to design kinematic mechanisms at the nanometer scale. These nanomechanisms, which we call DNA origami mechanisms (DOM), are made of relatively stiff bundles of double-stranded DNA (dsDNA), which function as rigid links, connected by highly compliant single-stranded DNA (ssDNA) strands, which function as kinematic joints. The design of kinematic joints including revolute, prismatic, cylindrical, universal, and spherical is presented. The steps as well as necessary software or experimental tools for designing DOM with DNA origami links and joints are detailed. To demonstrate the designs, we presented the designs of Bennett four-bar and crank-slider linkages. Finally, a list of technical challenges such as design automation and ...
Functional Nanomaterials is the first and unique compilation of the state-of-the-art review chapters covering all aspects of functional nanomaterials and their applications. Nanotechnology has led to a profound paradigm shift after the developments in recent years and after being classified as one of the most important areas of impending technology by the U.S. government. Novel functional nanomaterials are the basis of newly emerging nanotechnologies for various device applications. This book with 30 chapters reflects the tremendous world-wide interest in functional nanostructured -materials. The wide variety of topics covered in this book is interesting for professionals working in the fundamental and applied research. The book covers major classes of nanomaterials such as carbon nanotubes, carbon and polymer nano-fibers, nano-particles, nanocomposites, nanosheets, fullerenes, supramolecular and self-assembled nano-structures, and many other types of nanomaterials. In addition, this book ...
0115] Tapping mode AFM images in air for biomolecular arrays of different feature sizes (A-B: 0.1 μm; C-D: 4 μm) with 5-SH--(CH2)-6-T25 SAM after a 2-hour incubation with active terminal transferase (TdTase). Insets are the images of A and C at a higher magnification (1 μm×1 μm). B and D are the line profiles of A and C. Dotted lines represent the average height of gold arrays and immobilized DNA SAM. Poly(T) oligonucleotides were successfully extended on gold arrays with different lateral feature sizes. There are four significant observations from these experiments: (1) The average heights of the synthesized DNA nanostructures on gold features of 0.1 and 4 μm sides (minus the average height of gold arrays and immobilized DNA SAM) were 45.5±5.2 nm and 120.7±9.3 nm, respectively (B and D). The significant height increase suggests that the TdTase catalyzed polymerization of dTTP was successful. (2) The height of the DNA nanostructures grown by TdTase appears to be dependent upon the ...
This thesis examines possible routes for the preparation of graphene nanostructures on metal substrates and performs structural and electronic characterizations using scanning tunneling microcopy and spectroscopy. Investigations of graphene nanostructures necessitate the use of a suitable graphene-substrate combination, which allows for a controlled in situ preparation of small and well-shaped graphene nanostructures. The choice of a graphene-substrate combination with weak interaction in order to prevent the destruction of monolayer graphene properties is inevitable.,br /,,br /,Within this work graphene layers and graphene nanostructures are grown using well-established procedures based on thermal decomposition of hydrocarbons on Ir(111) and Rh(111) surfaces. Implementing intercalation - the insertion of additional material between graphene and substrate - allows for a tailoring of interactions between graphene and the substrate. In the first part of this work the intercalation of Fe and Ni is ...
Since the advent of nanotechnology, titanium dioxide nanomaterials have been at the center of research because of their low price and simple production process. These nanomaterials are synthesized at various purity levels from 75% to 99.97% and with diameters ranging from 5 nanometers to 250 nanometers. Although these nanomaterials are used in the commercial and industrial sectors, most of them are produced for skin care products, where they provide protection from UV radiation. They are also used as pigments or thickeners in many personal care products as pigments in paints and coatings, and in the production of solar cells in the energy sector. As these nanomaterials can degrade some types of pollutants, they are also being used to reduce atmospheric nitrous emissions through selective catalytic reduction systems.. Publishers analysts forecast the global titanium dioxide nanomaterials market to grow at a CAGR of 9.42% by volume during the period 2016-2020.. Complete Report Available at ...
Nanostructure deals with objects and structures that are in the 1-100 nm range.[10] In many materials, atoms or molecules ... In describing nanostructures it is necessary to differentiate between the number of dimensions on the nanoscale. Nanotextured ... The term 'nanostructure' is often used when referring to magnetic technology. Nanoscale structure in biology is often called ... Materials which atoms and molecules form constituents in the nanoscale (i.e., they form nanostructure) are called nanomaterials ...
ISBN 0-521-58099-4. Dieter Bimberg (2008). Semiconductor Nanostructures. Springer. pp. 243-245. ISBN 3-540-77898-5. Matsunaga, ...
ZnO nanostructuresEdit. Nanostructures of ZnO can be synthesized into a variety of morphologies including nanowires, nanorods, ... Nanostructures can be obtained with most above-mentioned techniques, at certain conditions, and also with the vapor-liquid- ... In 2008 the Center for Nanostructure Characterization at the Georgia Institute of Technology reported producing an electricity ... 2011). "One-dimensional ZnO nanostructures: Solution growth and functional properties". Nano Res. 4 (11): 1013-1098. CiteSeerX ...
Box-shaped graphene (BSG) nanostructure is an example of 3D nanomaterial.[36] BSG nanostructure has appeared after mechanical ... One-dimensional nanostructuresEdit. The smallest possible crystalline wires with cross-section as small as a single atom can be ... Nanostructure Science and Technology. Springer, New York, NY. pp. 21-52. doi:10.1007/978-1-4419-7853-0_2. ISBN 9781441978523. . ... Two-dimensional nanostructuresEdit. 2D materials are crystalline materials consisting of a two-dimensional single layer of ...
H. Hopster, H. P. Oepen (2005). Magnetic Microscopy of Nanostructures. Springer ISBN 3-540-40186-5, ISBN 978-3-540-40186-5 ...
"Resistance of molecular nanostructures". Physica E: Low-dimensional Systems and Nanostructures. 1 (1): 304-309. doi:10.1016/ ...
Parker, Andrew R.; Townley, Helen E. (2007). "Biomimetics of photonic nanostructures". Nature Nanotechnology. 2 (6): 347-53. ...
... nanostructures and functional materials; and soft matter, biological physics and interdisciplinary physics.. ...
Centre for Functional Nanostructures. Karlsruhe School of Optics and Photonics. "Home « EuroPhotonics". www.europhotonics.org. ... In 2001, the Centre for Functional Nanostructures (CFN) was established. It merges the fields of material sciences, biology, ...
Wang, Z.L. (2004). "Nanostructures of zinc oxide". Materials Today. 7 (6): 26-33. doi:10.1016/S1369-7021(04)00286-X. Nanorings ...
Ridley, B.K. (2017). Hybrid phonons in nanostructures. Oxford, United Kingdom: Oxford University Press. ISBN 978-0-19-878836-2 ...
Fu, Ying (2011). Optical properties of nanostructures. Pan Stanford. p. 201. *Andreev, A. A. (2000), An Introduction to Hot ...
Nanostructures». Solid State Physics 44. B.J. van Wees et al. (1988). «Quantized conductance of point contacts in a two- ...
These measurements employed suspended silicon nitride nanostructures that exhibited a constant thermal conductance of 16 g 0 {\ ...
The DNA nanostructure created by the team consists of six strands of DNA to form a tetrahedron, with one strand of RNA affixed ... Nanostructures of arbitrary, non-regular shapes are usually made using the DNA origami method. These structures consist of a ... DNA nanostructures must be rationally designed so that individual nucleic acid strands will assemble into the desired ... The first step in designing a nucleic acid nanostructure is to decide how a given structure should be represented by a specific ...
Ravishankar's researches have been focusing on the bottom-up paradigm for the synthesis and assembly of nanostructures. He is ... "Functional Inorganic Nanostructures Laboratory". MRC, IISc. 2017. "Researches". MRC, IISc. 2017. "Session 3A - Inaugural ... he serves as a professor and heads the Functional Inorganic Nanostructures Laboratory. ...
Jahnke, F. (2012). Quantum Optics with Semiconductor Nanostructures. Woodhead Publishing Ltd. ISBN 978-0857092328. . Kira, M.; ...
Young, James K.; Moore, Jeffrey S. (1995). "Chapter 12: Acetylenes in nanostructures". In Stang, P.J.; Diederich, F. Modern ... and has served as co-chair of the Institute's Molecular and Electronic Nanostructures theme. As a teacher, Moore has developed ...
Skomski, R.; Sellmyer, D. J. (2000). "Curie temperature of multiphase nanostructures". Journal of Applied Physics. 87 (9): 4756 ...
In silicon nanostructures (e.g. Silicon Nanowires) this rapid growth is generally followed by diminishing oxidation kinetics in ...
Kalt, H.; Hetterich, M. (2004). Optics of Semiconductors and Their Nanostructures. Springer. ISBN 978-3540383451. ... "Dynamics of the radiative recombination in cylindrical nanostructures with type-II band alignment". Physical Review B 79 (11). ... Quantum Optics with Semiconductor Nanostructures. Woodhead Publishing Ltd. ISBN 978-0857092328. Kira, M.; Koch, S. W. (2011). ...
C.W.J.Beenakker and H. van Houten (1991). "Quantum Transport in Semiconductor Nanostructures". Solid State Physics. 44: 1. ...
I also use these models to explore new properties of nanostructures. My field of expertise extends from nanoscale silicon ... He is first editor of Phonons in semiconductor nanostructures (1993) and co-editor of Contemporary Topics in Semiconductor ... Leburton has been involved in ongoing study of spintronics in semiconductor nanostructures, including the movement of electrons ... 1993). Phonons in semiconductor nanostructures. Dordrecht: Kluwer Academic. ISBN 9780792322771. Retrieved 27 December 2017. ...
2015). "Self-Assembled Wiggling Nano-Structures and the Principle of Maximum Entropy Production". Sci. Rep. doi:10.1038/ ... Beck, Mihály T.; Mándi, Géza (1997). "Solubility of C60". Fullerenes, Nanotubes and Carbon Nanostructures. 5 (2): 291-310. doi: ...
Despite their high negative charge, these nanostructures are naturally taken up by cells, without the need for positively ... Investigation of the mechanism for SNA uptake revealed that these nanostructures exhibit an ability to deactivate enzymes ... Spherical nucleic acids have catalyzed worldwide interest in using well-characterized nanostructures as novel labels for in ... 2011). "Polyvalent Nucleic Acid Nanostructures". J Am Chem Soc. 133 (24): 9254-9257. doi:10.1021/ja203375n. CS1 maint: Explicit ...
Researchers are pursuing the building of nanostructures using amino acids. Nanostructures that are created using amino acids ... These robots would have the ability to construct other nanostructures or perform medical procedures, and will be introduced ... Nanostructures & Nanomaterials: Synthesis, Properties & Applications. London, UK: Imperial College Press, 2004.. ... A predominant challenge to the social acceptance of nanotechnology is concerned with the medical use of nanostructures in the ...
Suwan N Jayasinghe (2006). "Self-assembled nanostructures via electrospraying". Physica E. 33 (2): 398-406. doi:10.1016/j.physe ... Future research may reveal important interactions between migrating cells and self-assembled nanostructures. Such nano- ...
Woo H, Northen TR, Yanes O, Siuzdak G (July 2008). "Nanostructure-initiator mass spectrometry: a protocol for preparing and ... Among the technologies being developed to address this challenge is Nanostructure-Initiator MS (NIMS), a desorption/ ionization ... "Clathrate nanostructures for mass spectrometry". Nature. 449 (7165): 1033-6. Bibcode:2007Natur.449.1033N. doi:10.1038/ ...
Nanostructure assembly and computing. Lieber has originated a number of approaches for parallel and scalable of assembly of ... Nanostructure characterization. Lieber developed applications of scanning probe microscopies that could provide direct ... "Directed assembly of one-dimensional nanostructures into functional networks". Science. 291: 630-3. 2001. doi:10.1126/science. ... doi:10.1016/S1369-7021(02)05254-9. "One-dimensional nanostructures: Rational synthesis, novel properties and applications". ...
Delerue, C. & Lannoo, M. (2004). Nanostructures: Theory and Modelling. Springer. p. 47. ISBN 3-540-20694-9.. ... onto the metal which is then used as a mask for mesa-etching these nanostructures on a chosen substrate. ... by causing an ionic reaction at an electrolyte-metal interface which results in the spontaneous assembly of nanostructures, ...
As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the ... The unique challenges in the fabrication of nanostructures are illustrated, and set into context of controlling structure, ... Nanostructures.html?id=cKyMmAly5osC&utm_source=gb-gplus-shareInorganic Nanostructures. ... As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the ...
Purchase Micro and Nanofabrication Using Self-Assembled Biological Nanostructures - 1st Edition. Print Book & E-Book. ISBN ... Micro and Nanofabrication Using Self-Assembled Biological Nanostructures 1st Edition. Editors: Jaime Castillo-León Winnie ... Self-assembled nanostructures based on peptides and proteins have been investigated and presented as biomaterials with an ... Through self-assembly peptides can give rise to a range of well-defined nanostructures such as nanotubes, nanofibers, ...
The possibility to produce chlorine-filled carbon nanostructures by the arc synthesis of nanostructures in the liquid phase has ... The possibility to produce chlorine-filled nanostructures is illustrated by the example of synthesis in chlorine-containing ... The proposed method may be one of the most efficient methods for synthesis of carbon nanostructures. ... Modification of carbon nanostructures by different chemical elements opens an opportunity for synthesis of materials of a new ...
The condensibles contain fullerenic nanostructures, such as single and nested nanotubes, single and nested nanoparticles and ... A method for the production of fullerenic nanostructures is described in which unsaturated hydrocarbon fuel and oxygen are ... By "fullerenic nanostructure" or "nanostructure" as those terms are used herein, it is meant a closed cage structure made up of ... It is a further object to provide a method for synthesizing fullerenic nanostructures having both ends of the nanostructure ...
From the photoluminescence (PL) of the ZnSe nanostructures, it is interesting to note that red color emission with a single ... The morphology and the growth mechanisms of the ZnSe nanostructures will be discussed. ... Wide Wavelength tuning of ZnSe Nanostructures by Temperature. Authors: W.C.H. Choy, Y.P. Leung, L. Jin and J. Wang ... From the photoluminescence (PL) of the ZnSe nanostructures, it is interesting to note that red color emission with a single ...
Tube-based nanostructures are nanostructures made of connected tubes and exhibit nanoscale organization above the molecular ... Ceramic lattice nanostructures have been formed using hollow tubes of titanium nitride (TiN). Using vertex-connected, ... "Fabrication and deformation of three-dimensional hollow ceramic nanostructures". Nature Materials. 12: 893-898. Bibcode: ...
This is a list of computer programs that are used to model nanostructures at the levels of classical mechanics and quantum ... nanostructures, polymers, surfaces...), set up and analyze ab-initio (Quantum Espresso, VASP, Abinit, NWChem...) or classical ( ... electronic properties and electrical transport phenomena in various nanostructures Ninithi - carbon nanotube, graphene, and ...
Within the "Carbon Nanostructures" book series, the reader will find valuable, up-to-date account of both the newer and ... The "Carbon Nanostructures" book series covers the state-of-art in the research of nanocarbons and their applications. Topics ... Since the discovery of Fullerenes in 1985, which was awarded the Nobel Prize in Chemistry in 1996, carbon nanostructures have ... Get the table of contents of every new volume published in Carbon Nanostructures. ...
This volume covers all aspects of carbon and oxide based nanostructured materials. The topics include synthesis, characterization and application of carbon-based namely carbon nanotubes, carbon nanofi
Get the table of contents of every new volume published in Carbon Nanostructures. ...
The British Carbon Group (SCI, RSC Faraday Division, IOP and) is delighted to be co-hosting three important RSC Award lectures at a special event to be held at Burlington House on Friday 31 October 2014. The three Awardees involved are working in the field of nanocarbons, and the afternoon event will be completed by the 2014 Ubbelohde Award Lecture (directly sponsored by The British Carbon Group) which this year is also on a similar theme.. ...
... and applications of materials containing true nanosize dimensions or nanostructures that enable novel/enhanced properties or ... Nanostructures for Medical Diagnostics. Md. Motasim Bellah,1,2 Shawn M. Christensen,3 and Samir M. Iqbal1,2,4,5 ... In the last few years, much work has been focused on the use of nanostructures toward problems of biology and medicine. In this ... nanoscale fabrication that have enabled reproducible production of nanostructures. The prospects, benefits, and limitations of ...
... Vladimir I. Gavrilenko,1 Tatiana V. Murzina,2 and Goro Mizutani3 ... Vladimir I. Gavrilenko, Tatiana V. Murzina, and Goro Mizutani, "Nonlinear Optics of Nanostructures," Physics Research ...
Organic-inorganic nanostructures. Definition. An organic-inorganic nanostructure is a nanoscale structure (that is, a structure ... As such, metal-organic frameworks (MOFs) are an example of an organic-inorganic nanostructure. ...
... these sequences could fold into nanostructures on their own, contiguously. For the immobile Holliday junction nanostructure, ... For example, nanostructure functionality can be directly selected for in the context of a cell. Although currently there is no ... Porous 3D DNA nanostructures can encapsulate or adsorb a variety of proteins and have potential applications to drug delivery ( ... In vivo replication and assembly of DNA nanostructures. (A) The in vivo replication scheme used by Lin et al. (7). dsDNA ...
Metals and Metallic Nanostructures (MMN). CONTACTS Name. Email. Phone. Room. Diana Farkas. [email protected] (703)292-7576 1065 N ... The Metals and Metallic Nanostructures (MMN) Program supports fundamental research and education on the relationships between ...
As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the ... The unique challenges in the fabrication of nanostructures are illustrated, and set into context of controlling structure, ... As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the ... The unique challenges in the fabrication of nanostructures are illustrated, and set into context of controlling structure, ...
... 3 September 2019 16:00 - 7 September 2019 13:00, Alghero, ... Nanostructures (HyNano), which is focused on hybrid organic-inorganic materials containing biomolecules or having bioinspired ...
Biomedical nanostructures. [Kenneth E Gonsalves;] -- Learn to Use Nanoscale Materials to Design Novel Biomedical Devices and ... Nanostructures for tissue engineering/regenerative medicine / Syam P. Nukavarapu ... [et al --. Nanostructures for cancer ... Nanostructures for tissue engineering/regenerative medicine / Syam P. Nukavarapu ... [et al -- Nanostructures for cancer ... Novel nanostructures as molecular nanomotors / Yan Chen [and others] --. Bioconjugation of soft nanomaterials / Neetu Singh, ...
Our research focuses on the interaction of nanoscale materials with radiation with the aim to develop novel analytical methods, to study chemical reactions triggered by the transfer of electrons and to stimulate new developments e.g. in cancer therapy. Below you will find more detailed information on our research projects. ...
Cheng, F.Y., Zhao, J.Z., Song, W., Li, C.S., Ma, H., Chen, J., Shen, P.W.: Facile controlled synthesis of MnO2 nanostructures ... Yang Y., Choi J.W., Cui Y. (2012) Oxide Nanostructures for Energy Storage. In: Wu J., Cao J., Han WQ., Janotti A., Kim HC. (eds ... Wu, C.Z., Xie, Y., Wang, D., Yang, J., Li, T.W.: Selected-control hydrothermal synthesis of gamma-MnO2 3D nanostructures. J. ... Lou, X.W., Wang, Y., Yuan, C.L., Lee, J.Y., Archer, L.A.: Template-free synthesis of SnO2 hollow nanostructures with high ...
b,c) Large-scale TEM image of as-synthesized α-HgS nanostructures with (+)C-P and (+)C-M nanostructures by following synthetic ... Similar to nanostructures with chiral morphology in Fig. 2, the size of HgS nanostructures with achiral morphology can also be ... i-n) TEM images of (+)C-M (i-k) and (+)C-P (l-n) α-HgS nanostructures with different size. Blue dashed curve is added to guide ... Figure 3: The α-HgS nanostructures with chiral lattice ((+)C) but various achiral morphology.. (a-c) Model, typical large-scale ...
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New printer creates color by shaping nanostructures. Laser morphs tiny germanium pillars to generate shades that wont fade. ... Carving nanostructures with a laser creates long-lasting colors.. Researchers developed the new printing technique as an ... The coating protects the shapes of the newly carved nanostructures.. Researchers have tried structure-based color printing ...
Different approaches have been proposed to treat cancer cells using gold nanoparticles (AuNPs) in combination with radiation ranging from infraredlasers to high-energy ion beams. Here we study the decomposition of the DNA/RNA nucleobases thymine (T) and uracil (U) and the well-known radiosensitizer 5-bromouracil (BrU) in close vicinity to AuNPs, which are irradiated with a nanosecond pulsed laser (532 nm) matching the surface plasmon resonance of the AuNPs. The induced damage of nucleobases is analyzed by UV−vis absorption spectroscopy and surface-enhanced Raman scattering (SERS). A clear DNA damage is observed upon laser irradiation. SERS spectra indicate the fragmentation of the aromatic ring system of T and U as the dominant form of damage, whereas with BrU mainly the cleavage of the Br−C bond and formation of Br− ions is observed. This is ...
Designing New Metal Alloys Using Engineered Nanostructures 0 By editor on November 21, 2017. Brookhaven National Lab, College ... "At the time, I was looking for ways to apply my idea of stabilizing nanostructures in metals to an application-oriented problem ... In these roles, he takes advantage of the much higher magnifications of electron microscopes to see tiny nanostructures in fine ... "We extensively use the electron microscopy facilities to look at material micro- and nanostructure, very often at how ...
Collective Excitations in Advanced Nanostructures. From 2015-10-01 to 2019-09-30, ongoing project , CoExAN Website ... stemming from the quantum nature of light and look at sophisticated arrangements of carbon-based and other nanostructures in ... the participating groups in quantum optics aiming eventually at a design and feasibility study of novel advance-nanostructure- ... considered in the proposed research is associated with the quantum mechanics and quantum optics of carbon-based nanostructures ...
"On-surface synthesis is a promising strategy for the formation of nanostructures. This new thermally controlled reaction ... New reaction for the synthesis of nanostructures. Institute of Chemical Research of Catalonia (ICIQ) ... Nevertheless, this use could have huge advantages when engineering nanostructures with technological applications. ...
Purchase One-dimensional Nanostructures for PEM Fuel Cell Applications - 1st Edition. Print Book & E-Book. ISBN 9780128111123, ... One-dimensional Nanostructures for PEM Fuel Cell Applications 1st Edition. 0.0 star rating Write a review ... One-dimensional Nanostructures for PEM Fuel Cell Applications provides a review of the progress made in 1D catalysts for ... The unique structure of one-dimensional nanostructures give them advantages to overcome some drawbacks of Pt/C nanoparticles as ...
Layered nanostructures are constructed by imprinting material with a mold, while selectively modifying and removing a portion ... The nanostructure 280 of FIG. 2K shows the cured first material 210′ and the cured second material 250′ in contact with each ... Layered nanostructures are constructed by imprinting material with a mold, while selectively modifying and removing a portion ... 1B and 1C are a problem, and it has proven difficult to build up reliable nanostructures using previously known techniques. ...
... have proposed a brand-new carbon nanostructure designed to store energy in mechanical form. ...
Because it is label-free, the signal is directly from the object so that we can learn more about the nanostructure.". Findings ... Researchers have found a way to see synthetic nanostructures and molecules using a new type of super-resolution optical ... However, researchers want to view molecules such as proteins and lipids, as well as synthetic nanostructures like nanotubes, ... Super-resolution microscope possible for nanostructures. 30.04.2013. ...
  • In recent years physicists, materials scientists and chemists have devoted increasing attention to low-dimensional systems and as Raman spectroscopy can be used to study and analyse such materials as carbon nanotubes, quantum wells, silicon nanowires, etc., it is fast becoming one of the most powerful and sensitive experimental techniques to characterize the qualities of such nanostructures. (kobo.com)
  • The developed fabrication methods facilitate technologically challenging types of nanostructures and their fabrication on non-planar surfaces. (aalto.fi)
  • The unique challenges in the fabrication of nanostructures are illustrated, and set into context of controlling structure, dimensionality and electronic properties. (google.com)
  • Self-assembled nanostructures based on peptides and proteins have been investigated and presented as biomaterials with an impressive potential for a broad range of applications such as microfabrication, biosensing platforms, drug delivery systems, bioelectronics and tissue reparation. (elsevier.com)
  • As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the. (google.com)
  • As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the surface science tools used to characterize them, such as electron spectroscopy and scanning probe techniques. (google.com)
  • Raman Spectroscopy and its Application in Nanostructures is an original and timely contribution to a very active area of physics and materials science research. (kobo.com)
  • In this work, a rapid, replicable method for imprinting concave nanostructures to be used as functional light-trapping nanostructures in organic thin-films is presented. (ktu.lt)
  • We show how nanostructure geometry, position and fluorescent properties can be tuned, allowing flexible device design. (bibsys.no)
  • The same approach enables the fabrication of suspended nanostructures and gives a platform for accurate measurement of material properties and realization of lab-on-a-chip concepts. (aalto.fi)
  • Herein, we describe the fabrication of high aspect ratio nanostructures using electron beam lithography in the epoxy-based polymer SU-8. (bibsys.no)
  • SU-8 nanostructures were made directly on glass cover slips, enabling the use of high resolution optical techniques such as live-cell confocal, total internal reflection and 3D structured illumination microscopy to investigate cell interactions with the nanostructures. (bibsys.no)
  • During my thesis I studied different F / N lateral nanostructures, showing that it is possible to take advantage of the three-dimensional geometry of the structures, and of the different possible orientations of the injected spins. (archives-ouvertes.fr)
  • In particular, new nanostructures whose geometry takes advantage of the three directions of space (based on both vertical and lateral spin transport) are presented in Chapter VI. (archives-ouvertes.fr)
  • Her research focuses on surface science, thin films and interfaces, nanostructures for spintronics and photovoltaics. (google.com)
  • The Metals and Metallic Nanostructures (MMN) Program supports fundamental research and education on the relationships between processing, structure and properties of metals and their alloys. (nsf.gov)
  • Trelewicz is now an assistant professor in the College of Engineering and Applied Sciences' Department of Materials Science and Chemical Engineering with a joint appointment in the Institute for Advanced Computational Science at Stony Brook University and principal investigator of the Engineered Metallic Nanostructures Laboratory . (stonybrook.edu)
  • The teams from Seoul National University (SNU), Pohang University of Science and Technology and LG Display Co. have successfully created three-dimensional metallic nanostructures with chirality, SNU said. (koreaherald.com)
  • To generate ssDNA for the formation of nanostructures, in vivo rolling circle amplification was exploited ( Fig. 1 A ). Two different dsDNA sequences were cloned into a phagemid vector containing a bacteriophage M13 origin of replication. (pnas.org)
  • On-surface synthesis is a promising strategy for the formation of nanostructures. (eurekalert.org)
  • The unique structure of one-dimensional nanostructures give them advantages to overcome some drawbacks of Pt/C nanoparticles as a new type of excellent catalysts for fuel cell reactions. (elsevier.com)
  • Through self-assembly peptides can give rise to a range of well-defined nanostructures such as nanotubes, nanofibers, nanoparticles, nanotapes, gels and nanorods. (elsevier.com)
  • After freezing cerium oxide nanoparticles in solution at different temperatures and rates and storing the frozen solution for days to weeks, the research team used transmission electron microscopy and other tools to characterise the resulting nanostructures. (theengineer.co.uk)
  • The condensibles contain fullerenic nanostructures, such as single and nested nanotubes, single and nested nanoparticles and giant fullerenes. (google.com.au)
  • According to Nam, the 3D crumpled graphene?Au nanostructure exhibits at least one order of magnitude higher SERS detection sensitivity than that of conventional, flat graphene?Au nanoparticles. (innovations-report.com)
  • Nanophotonics, Nanoparticles, Nanooptoelectronics and Nanostructures Conference aims to bring together leading academic scientists, researchers and research scholars to exchange and share their experiences and research results on all aspects of Nanophotonics, Nanoparticles, Nanooptoelectronics and Nanostructures Conference. (waset.org)
  • It also provides a premier interdisciplinary platform for researchers, practitioners, and educators to present and discuss the most recent innovations, trends, and concerns as well as practical challenges encountered and solutions adopted in the fields of Nanophotonics, Nanoparticles, Nanooptoelectronics and Nanostructures Conference. (waset.org)
  • The nanostructures are formed inside a liquid known as a ferrofluid, a solution with suspensions of nanoparticles composed of iron-containing compounds. (photonics.com)
  • By focusing on hollow structures of some binary metal oxides (such as SnO 2 ,TiO 2 , Fe 2 O 3 , Co 3 O 4 ) and complex metal oxides, we seek to provide some rational understanding on the effect of nanostructure engineering on the electrochemical performance of the active materials. (mendeley.com)
  • Herein, we develop a novel epitaxy based two-step synthetic scheme to achieve independent control of crystallographic and geometric chirality in an inorganic nanostructure, and we employ cinnabar α-HgS as an example to demonstrate versatile control and to explore enabled chirality interplay originating from primary atomic lattice and higher-order morphology with in-depth structural and optical characterization. (nature.com)
  • Since the discovery of Fullerenes in 1985, which was awarded the Nobel Prize in Chemistry in 1996, carbon nanostructures have been attracting a great deal of attention from the research community. (springer.com)
  • The "Carbon Nanostructures" book series covers the state-of-art in the research of nanocarbons and their applications. (springer.com)
  • Within the "Carbon Nanostructures" book series, the reader will find valuable, up-to-date account of both the newer and traditional forms of carbon. (springer.com)
  • Another set of problems to be considered in the proposed research is associated with the quantum mechanics and quantum optics of carbon-based nanostructures. (europa.eu)
  • We will also study collective photonics phenomena stemming from the quantum nature of light and look at sophisticated arrangements of carbon-based and other nanostructures in arrays or placing them in microcavities, thus utilizing the significant expertise of some of the participating groups in quantum optics aiming eventually at a design and feasibility study of novel advance-nanostructure-based optoelectronic devices including microwave, terahertz and light generators, detectors and frequency modulators. (europa.eu)
  • In an attempt to overcome this hurdle, researchers at the Queensland University of Technology (QUT) have proposed a brand-new carbon nanostructure designed to store energy in mechanical form. (forbes.com)
  • Modification of carbon nanostructures by different chemical elements opens an opportunity for synthesis of materials of a new generation for different applications. (nsti.org)
  • This work demonstrates a possibility to produce such materials by the new proposed by authors method for synthesis of carbon nanostructures using arc evaporation of materials in liquid medium. (nsti.org)
  • The possibility to produce chlorine-filled carbon nanostructures by the arc synthesis of nanostructures in the liquid phase has been demonstrated. (nsti.org)
  • The proposed method may be one of the most efficient methods for synthesis of carbon nanostructures. (nsti.org)
  • Activated carbon samples with high mesoporous volume ( 1 ml/g), and nanostructure similar to activated graphene were prepared at activation temperature (1050 °C) and KOH loading (0.05 or 0.075 mol/g biochar). (slideshare.net)
  • Conclusion: This protocol offers the potential to use other protein rich feedstocks for preparing nanostructured carbon, containing nanostructure similar to activated graphene, as an advanced carbon material. (slideshare.net)
  • By "crumpling" to increase the surface area of graphene-gold nanostructures, researchers from the University of Illinois at Urbana-Champaign have improved the sensitivity of these materials, opening the door to novel opportunities in electronics and optical sensing applications. (innovations-report.com)
  • This mechanical self-assembly strategy will enable a new class of 3D crumpled graphene?gold (Au) nanostructures. (innovations-report.com)
  • Taking a cue from nature, collaborators from the University of Central Florida , Pacific Northwest National Laboratory and the UK Defence Academy grew cerium oxide nanostructures inside the tiny voids that form in aqueous solutions upon freezing. (theengineer.co.uk)
  • In the framework of the Marie Curie - RISE 2017 H2020 Project: Hybrid Nanostructured Oligonucleotide Platforms for Biomedical Applications - Nano-OligoMed (778133) the consortium project and the Materials Science and Nanotechnology Laboratory of the University of Sassary invite you to participate in the International Summer School on Hybrid (bio) Nanostructures (HyNano) , which is focused on hybrid organic-inorganic materials containing biomolecules or having bioinspired structures. (rsc.org)
  • Researchers have found a way to see synthetic nanostructures and molecules using a new type of super-resolution optical microscopy that does not require fluorescent dyes, representing a practical tool for biomedical and nanotechnology research. (innovations-report.com)
  • Assembling nanostructures into three-dimensional shapes is one of the major goals of nanotechnology. (scienceblog.com)
  • Shape-controlled synthesis of gold nanostructures using DNA origami molds. (nih.gov)
  • At the time, I was looking for ways to apply my idea of stabilizing nanostructures in metals to an application-oriented problem," said Trelewicz. (stonybrook.edu)
  • As such, metal-organic frameworks (MOFs) are an example of an organic-inorganic nanostructure. (nature.com)
  • As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the. (google.com)
  • As such, it systematically covers the inorganic nanostructures in the breadth needed, while presenting them together with the surface science tools used to characterize them, such as electron spectroscopy and scanning probe techniques. (google.com)
  • By performing systematic circular dichroism (CD) measurements on samples with different combinations of crystallographic and geometric chirality, evolution of cooperative chirality can be revealed at multiple levels of inorganic nanostructures. (nature.com)
  • Providing a vital bridge between classic (macroscopic) and quantum (microscopic) optics, Nonlinear Optics of Surfaces and Nanostructures fills an important gap is this emerging field. (researchandmarkets.com)
  • Researchers at the Environmental Molecular Sciences Laboratory at the US Pacific Northwest National Laboratory have developed an environmentally-friendly way to make nanostructures. (theengineer.co.uk)
  • By understanding the nanostructure of naturally occurring materials, researchers may be able to develop new light-weight, high-strength materials that will require less energy to manufacture and that could make the products in which they are used more energy efficient. (medindia.net)
  • The researchers also want to try to make even smaller nanostructures to find the limitations of the assembly process and to study the interesting optical properties that are expected from these structures. (photonics.com)
  • In this chapter, the effect of nanostructures on various oxide materials in batteries/capacitors will be discussed. (springer.com)
  • Metal oxide hollow nanostructures for lit. (mendeley.com)
  • In this Research News, we summarize the recent research activities in the synthesis of metal oxide hollow nanostructures with controlled shape, size,composition, and structural complexity, as well as their applications in LIBs. (mendeley.com)
  • Finally, the development of a non-aqueous one-pot synthesis route to gold-iron oxide hetero-nanostructures was described. (hu-berlin.de)
  • Additionally, nearly all of the DNA nanostructures that have been described rely on defined, synthetic DNA pieces, something that would not necessarily be available in vivo. (pnas.org)
  • Whereas previous attempts to replicate DNA nanostructures required additional, synthetic oligonucleotides for assembly, these sequences could fold into nanostructures on their own, contiguously. (pnas.org)
  • In these roles, he takes advantage of the much higher magnifications of electron microscopes to see tiny nanostructures in fine detail and learn what happens when they are exposed to heat, radiation and mechanical forces. (stonybrook.edu)
  • When the phase differences between the multiple beams of light are designed appropriately, the excitation fields for electron oscillations in the nanostructures are much greater than those at normal incidence. (redorbit.com)
  • The starting point of this scheme is the enhancement of the excitation field for the electron oscillations in the nanostructures, which does not conflict with previous designs that varied the topological shapes of the nanostructures or combined nanostructures to generate larger electric fields. (redorbit.com)
  • Here, thin slices are removed from a nanostructure and scanned with an electron beam. (nanowerk.com)
  • Scanning electron microscopy micrographs show a periodically ordered mesoporous gyroidal resin template (A and B) and the resulting laser-induced crystalline silicon nanostructure after template removal (C and D). (nanowerk.com)
  • Scientists from the University of Virginia, US, and the Fritz Haber Institute in Germany have used single-step electrochemical machining to make complex nanostructures in nickel. (nanotech-now.com)
  • By controlling solution freezing rate, nanoparticle concentration and storage temperature, the team's ice mould method can be used to produce nanostructures with tailored shapes and sizes. (theengineer.co.uk)
  • Because the surface plasmon resonance depends strongly on the shape of the nanostructures, nanostructures with different topological shapes were prepared to enhance the local electric fields. (redorbit.com)
  • Controlled photobioreactor cultivation of the N. frustulum cell suspension to silicon starvation induced changes in the nanostructure of the diatom frustule, which in turn imparted blue photoluminescence (PL) to the frustule biosilica. (ingentaconnect.com)
  • From the photoluminescence (PL) of the ZnSe nanostructures, it is interesting to note that red color emission with a single peak at the photon energy of 2eV at room temperature is obtained while the typical bandgap transition energy of ZnSe is 2.7eV. (nsti.org)
  • Analysis of the electric fields around nanostructures indicates that they can provide a basic foundation to obtain greater SERS intensity. (redorbit.com)
  • A group of South Korean scientists has used amino acids and peptides to create a new type of nanostructure that can be utilized in various industries, a joint university-company team said Thursday. (koreaherald.com)
  • Tufts University engineers have demonstrated that it is possible to generate nanostructures from silk in an environmentally friendly process that uses water as a developing agent and standard fabrication techniques. (redorbit.com)
  • The new method could be used to produce nanostructures in a more environmentally-friendly way as well as being less expensive than the more traditional manufacturing techniques. (theengineer.co.uk)
  • Nonetheless, it was at least formally possible that a DNA nanostructure could replicate and assemble wholly in vivo. (pnas.org)
  • The in vivo-synthesized DNAs could then be assessed for the ability to assemble into nanostructures in vitro. (pnas.org)
  • When combined with nanogram amounts of angiogenic growth factors known to interact with heparin, the nanostructures stimulate extensive new blood vessel formation in vivo. (acs.org)
  • Scientists from the University of Twente and the European Synchrotron Radiation Facilty (ESRF) discovered a new method to look deep inside a 3D nanostructure. (utwente.nl)
  • Previous attempts to break this conundrum have involved DNA production and nanostructure assembly in vitro. (pnas.org)
  • The key to the assembly of these nanostructures is to fine-tune the interactions between positively and negatively magnetized particles," Erb said. (photonics.com)
  • Because of the unique nature of this "bulk" assembly technique, Yellen believes that the process easily could be scaled up to create large quantities of custom-designed nanostructures in high-volume reaction vessels. (photonics.com)
  • However, many methods of synthesizing ZnS nanostructures are complex and require expensive equipment. (ebscohost.com)
  • This is why we think that TXT is an original and powerful tool to critically assess 3D functional nanostructures. (utwente.nl)
  • I want to get the latest chemistry news from C&EN in my inbox every week. (acs.org)
  • The scheme is based on manipulation of the incident wave to allow the superposition of the electric fields of multiple beams of light to work as the excitation source for the electrons in the nanostructures, and larger electric fields are thus excited around the nanostructures. (redorbit.com)
  • Manners, Winnik, and coworkers say the new method will help chemists give aggregated cylindrical nanostructures any length and composition required for their potential use as drug delivery vehicles and molecular electronics components. (acs.org)