532 results about "Metal nanowires" patented technology

A method of forming monodispersed metal nanowires comprising: forming a reaction mixture including a metal salt, a capping agent and a quaternary ammonium chloride in a reducing solvent at a first temperature; and forming metal nanowires by reducing the metal salt in the reaction mixture.

Compositions are provided comprising aqueous dispersions of polythienothiophenes and colloid-forming polymeric acids. Films from invention compositions are useful as hole injection layers in organic electronic devices, including electroluminescent devices, such as, for example, organic light emitting diodes (OLED) displays, as hole extraction layers in organic optoelectronic devices, such as organic photovoltaic devices, and in combination with metal nanowires or carbon nanotubes in applications such as drain, source, or gate electrodes in thin film field effect transistors.

A bio-implantable electrochemical cell system for active implantable medical devices. In one embodiment, the fuel cell includes an electrode structure consisting of immobilized anode and cathode enzymes deposited on nanostructured high-surface-area metal nanowires or carbon nanotube electrodes. The anode enzyme comprises immobilized glucose oxidase and the cathode enzyme comprises immobilized laccase. Glucose is oxidized at the surface of the anode and oxygen is reduced at the surface of the cathode. The coupled glucose oxidation-oxygen reduction reactions provide a self-generating current source. In another embodiment, the nanowires or carbon nanotubes, along with the adjacent surface anode and cathode electrodes, are coated with immobilized glucose oxidase and immobilized laccase containing biocolloidal substrates, respectively. This results in the precise construction of an enzyme architecture with control at the molecular level, while increasing the reactive surface area and corresponding output power by at least two orders of magnitude.

An interpenetrating network assembly with a network of connected flakes of nano-scale crystalline carbon and nano-scale particles of an electroactive material interconnected with the carbon flakes is provided. The network assemblies are particularly suited for energy storage applications that use metal oxide electroactive materials and a single charge collector or a source and drain. Interpenetrating networks of graphene flakes and metal oxide nanosheets can form independent pathways between source and drain. Nano-scale conductive materials such as metal nanowires, carbon nanotubes, activated carbon or carbon black can be included as part of the conductive network to improve charge transfer.

Provided are a method of isolating and purifying metal nanowires from a crude and complex reaction mixture that includes relatively high aspect ratio nanostructures as well as nanostructures of low aspect ratio shapes, and conductive films made of the purified nanostructures.

A hydrogen gas sensor and / or switch fabricated from arrays nanowires composed of metal or metal alloys that have stable metal hydride phases. The sensor and / or switch response times make it quite suitable for measuring the concentration of hydrogen in a flowing gas stream. The sensor and / or switch preferably operates by measuring the resistance of several metal nanowires arrayed in parallel in the presence of hydrogen gas. The nanowires preferably comprise gaps or break junctions that can function as a switch that closes in the presence of hydrogen gas. Consequently, the conductivity of the nanowires of the sensor and / or switch increases in the presence of hydrogen

The present disclosure relates to OLED and PV devices including transparent electrodes that are formed of conductive nanostructures and methods of improving light out-coupling in OLED and input-coupling in PV devices.

The invention relates to a self-supporting composite element and to a method of producing same. The composite element comprises a substrate of electronic conductive material which is covered with metal nanowires that are essentially oriented along a plane that is perpendicular to the substrate. The element is produced in a cell comprising a cathode which is formed by the substrate to be covered, one or more anodes and an electrolyte which is formed by a solution of a precursor of the metal material and optionally containing a conductive ionic salt, a flat porous membrane which is placed between the cathode and each of the anodes and a spacer element between each membrane and the anode adjacent thereto, the different constituent parts of the cell being maintained in contact.

Compositions are provided comprising aqueous dispersions of polythiophenes and colloid-forming polymeric acids. Films from invention compositions are useful as buffer layers in organic electronic devices, including electroluminescent devices, such as, for example, organic light emitting diodes (OLED) displays in combination with metal nanowires or carbon nanotubes in applications such as drain, source, or gate electrodes in thin film field effect transistors.

Polymer binders, e.g., crosslinked polymer binders, have been found to be an effective film component in creating high quality transparent electrically conductive coatings or films comprising metal nanostructured networks. The metal nanowire films can be effectively patterned and the patterning can be performed with a high degree of optical similarity between the distinct patterned regions. Metal nanostructured networks are formed through the fusing of the metal nanowires to form conductive networks. Methods for patterning include, for example, using crosslinking radiation to pattern crosslinking of the polymer binder. The application of a fusing solution to the patterned film can result in low resistance areas and electrically resistive areas. After fusing the network can provide desirable low sheet resistances while maintaining good optical transparency and low haze. A polymer overcoat can further stabilize conductive films and provide desirable optical effects. The patterned films can be useful in devices, such as touch sensors.

Metal nanowires with high linearity can be produced using metal salts at a relatively low temperature. A transparent conductive film can be formed using the metal nanowires. Particularly, the transparent conductive film has high transmittance, low sheet resistance, and good thermal, chemical and mechanical stability. The transparent conductive film has a high electrical conductivity due to the high linearity of the metal nanowires. The metal nanowires take up 5% or less of the volume of the transparent conductive film, ensuring high transmittance of the transparent conductive film. Furthermore, the metal nanowires are useful as replacements for existing conductive materials, such as ITO, conductive polymers, carbon nanotubes and graphene. The metal nanowires can be applied to flexible substrates and other various substrates due to their good adhesion and high applicability to the substrates. Moreover, the metal nanowires can find application in various fields, such as displays and solar cell devices.

A hybrid transparent conductive film, and methods for fabricating such hybrid transparent conductive films, involving the assembly of two-dimensional graphene-based materials with one-dimensional silver and / or copper nanowires with high optical transmittance and good electrical conductivity. The hybrid films are characterized by a good degree of control of the architecture at the nanoscale level, where the weakness(es) of each component are offset by the strengths of the other components. By rational design of the structure and using simple and locate-cost fabrication methods, hybrid films with sheet resistance of 26 ohm / sq and optical transmittance (at λ=550 nm) of 83% for reduced graphene oxide / silver nanowire films, and 64 ohm / sq and optical transmittance of 93.6% for monolayer graphene / silver nanowire films have been fabricated. These values are comparable to transparent conductive films based on indium tin oxide but are now able to be used in flexible electronics due to their good mechanical properties.

The invention belongs to the technical field of photo-electronics, and more specifically relates to a low-roughness and low-square-resistance flexible transparent conductive composite thin film, wherein the thin film adopts a three-layer composite structure; the lowest bottom layer is provided with a transparent polymer thin film; the middle layer is provided with a conductive network formed by metal nanowires; the topmost layer is a provided with a transparent conductive layer which uniformly covers the transparent polymer thin film and the conductive network; the flexible transparent conductive composite thin film is less than 20-nanometer in average roughness, less than 30-ohm / square meter in square resistance, and greater than 80% of light transmittance within a visible light range; and the transparent conductive thin film can bear bending with radius of curvature of 2mm. The invention also discloses a preparation method for the flexible transparent conductive composite thin film. The flexible transparent conductive composite thin film provided by the invention has low roughness, high conductivity, high light transmittance, simple preparation method and low cost, and is particularly suitable for flexible display and illumination, a flexible solar battery and flexible touch equipment.

Vapor phase methods for synthesizing metal nanowires directly without the help of templates. A vapor phase method in which nucleation and growth of metal oxides at temperatures higher than the oxide decomposition temperatures lead to the respective metal nanowires. The chemical vapor transport of tungsten in the presence of oxygen onto substrates kept at temperatures higher than the tungsten oxide decomposition temperature (˜1450° C.) led to nucleation and growth of pure metallic tungsten nanowires. In a similar procedure, tungsten oxide nanowires were synthesized by maintaining the substrates at a temperature lower than the decomposition temperature of tungsten oxide. The vapor transport of low-melting metal oxides provides a procedure for synthesizing metal and metal oxide nanowires.

A transparent conductive film including metal nanowires and a colored compound adsorbed by the metal nanowires is provided. The metal nanowires are a material which absorbs light in the visible light region, and also each has a functional group which is bound to a metal constituting the metal nanowire.

The invention relates to a preparation method of the phase change material, in particular to a preparation method of the compound phase change material which has a higher latent heat of phase change and a high thermal conductivity under the solid and the liquid states. The preparation steps are as follows: firstly, metal nanowires are prepared; secondly, the metal nanowires are dispersed into an organic solvent; thirdly, an organic phase change material and the mixture are mixed; fourthly, the mixture is dispersed by ultrasonic under the condition of heating, and the organic solvent is removed. The phase change material prepared by the method has the advantages that the art is simple, the cost is low, and the thermal conductivity of the organic phase change material is enhanced greatly while the latent heat of phase change is maintained, thus the performance of the organic phase change material is improved effectively, and the application scope is greatly developed.

The present invention provides for variable-range hydrogen sensors and methods for making same. Such variable-range hydrogen sensors comprise a series of fabricated Pd—Ag (palladium-silver) nanowires—each wire of the series having a different Ag to Pd ratio—with nanobreakjunctions in them and wherein the nanowires have predefined dimensions and orientation. When the nanowires are exposed to H2, their lattace swells when the H2 concentration reaches a threshold value (unique to that particular ratio of Pd to Ag). This causes the nanobreakjunctions to close leading to a 6-8 orders of magnitude decrease in the resistance along the length of the wire and providing a sensing mechanism for a range of hydrogen concentrations.

The invention discloses a micro polaroid array on basis of metal nanometer optical gratings and a preparation method thereof. The single-layer micro polaroid array comprises a substrate with high light-admitting quality and the metal nanometer optical gratings on the substrate, wherein the arrangement directions of the metal nanometer optical gratings on the substrate are not identical, one optical grating formed by adjacent metal nanowires which are arranged in the same direction is a micro Polaroid, and the size of each micro polaroid is equal to the pixel size of a photosensitive element chip. Meanwhile, the invention further discloses a preparation method for the single-layer micro polaroid array on the basis of the metal nanometer optical gratings. Accordingly, micro polaroid arrays in different polarization directions can be integrated to the same layer, the problem that light transmittance needed by a micro polaroid array based on multi-layer metal optical gratings in the prior art is not high is solved, the technological processes are simplified, and manufacturing cost is reduced.

Metal nanowires with uniform noble metal coatings are described. Two methods, galvanic exchange and direct deposition, are disclosed for the successful formation of the uniform noble metal coatings. Both the galvanic exchange reaction and the direct deposition method benefit from the inclusion of appropriately strong binding ligands to control or mediate the coating process to provide for the formation of a uniform coating. The noble metal coated nanowires are effective for the production of stable transparent conductive films, which may comprise a fused metal nanostructured network.

The invention relates to a high-elasticity conductive fiber and a preparation method thereof. The preparation method includes that firstly, elastic yarns are subjected to preprocessing, secondly, a metal nanowire dispersion liquid is used for impregnating and coating the preprocessed elastic yarns and metal nanowires can be adsorbed to the surface of the elastic yarns, and thirdly, the elastic yarns with the metal nanowires adsorbed to the surface are subjected to hydrogen plasma processing or thermal processing.

The present invention provides a metal nanowire-containing composition containing at a least metal nanowire and a heterocyclic compound having an interaction potential of less than −1 mV.

The invention provides a laminated transparent electrode and a preparation method thereof. The laminated transparent electrode sequentially comprises a transparent substrate, a first-layer metal oxide film on the transparent substrate, a metal nanowire network layer on the first-layer metal oxide film, and a second-layer metal oxide film covering the metal nanowire network layer and the first-layer metal oxide film not covered by the metal nanowire network layer. A preparation method of the metal nanowire network layer comprises the steps of preparing a metal film layer on the first-layer metal oxide film, preparing a high-polymer nanofiber network on the metal film layer by using an electrostatic spinning technique, removing the metal film that is not covered by the high-polymer nanofiber network through etching by taking high-polymer nanofiber as a mask, and removing the high-polymer nanofiber network. The laminated transparent electrode has the advantages of high light transmissivity, low resistivity, firm contact with the substrate, smooth surface, low preparation and growth temperature, low cost and the like, and can be widely applied to various organic and inorganic photoelectric devices.

Fusing nanowire inks are described that can also comprise a hydrophilic polymer binder, such as a cellulose based binder. The fusing nanowire inks can be deposited onto a substrate surface and dried to drive the fusing process. Transparent conductive films can be formed with desirable properties.

The invention discloses a stress sensor with a self-repairing ability and a preparation method thereof. according to the preparation method, a one-dimensional metal nanowire, a two-dimensional inorganic nanosheet, hydrogel functional polymers, an additive and the like are compounded to prepare a nanocomposite colloidal printing ink with rheological characteristics, and the colloidal printing ink is printed on a wearable substrate through screen printing to prepare the repairable stress sensor having a shell-like bionic structure, wherein the one-dimensional metal nanowire provides a conductivenetwork structure for reducing resistance of the sensor; the two-dimensional inorganic nanosheet forms a layered strcture for improving sensitivity of the sensor; and a reversible dynamic cross-linking point is formed among the repairable hydrogel functional polymers, the two-dimensional inorganic nanosheet and the additive, so that the device has repairable performance. The prepared stress sensor has the advantages of large operating strain range, high sensitivity, repairable property after overload damage and the like, and has great application prospects in the fields of artificial electronic skin and biomimetic robots.

A subject is to provide a material capable of obtaining a transparent conductive film having an excellent conductivity, optical transparency, environmental resistance, process resistance and close contact in a single application process, and to provide a transparent conductive film and a device element using the same. The means is to prepare a coating forming composition containing at least one kind of materials selected from the group of metal nanowires and metal nanotubes as a first component, polysaccharides and a derivative thereof as a second component, a thermosetting resin compound as a third component, and water as a fourth component to obtain a transparent conductive film by using the coating.

To provide a material capable of obtaining a transparent conductive film having an excellent conductivity, Optical transmission, Environmental reliability, suitability for process, adhesion and hardness in a single application process, and to provide a transparent conductive film using the same and a device element using the same. A coating forming composition containing at least one kind selected from the group of metal nanowires and metal nanotubes as a first component, a polymer compound having a hydroxyl group as a second component, a compound having a group 13 element or a transition metal element as a third component, and further a solvent is prepared to obtain a transparent conductive film by the coating.

A method for manufacturing of a conductive member includeforming one of a conductive layer including metal nanowires or a light-scattering layer including insulating light-scattering fine particles on a substrate in a pattern shape; andforming the other of the conductive layer including metal nanowires or the light-scattering layer including insulating light-scattering fine particles on a space of the substrate wherein the one of the conductive layer or the light-scattering layer is not formed.