77 results about "Nanostructured composites" patented technology

A nanostructured composite material comprising semiconductor nanocrystals in a crystalline semiconductor matrix. Suitable nanocrystals include silicon, germanium, and silicon-germanium alloys, and lead salts such as PbS, PbSe, and PbTe. Suitable crystalline semiconductor matrix materials include Si and silicon-germanium alloys. A process for making the nanostructured composite materials. Devices comprising nanostructured composite materials.

A family of materials wherein nanostructures and / or nanotubes are incorporated into a multi-component material arrangement, such as a metallic or ceramic alloy or composite / aggregate, producing a new material or metallic / ceramic alloy. The new material has significantly increased strength, up to several thousands of times normal and perhaps substantially more, as well as significantly decreased weight. The new materials may be manufactured into a component where the nanostructure or nanostructure reinforcement is incorporated into the bulk and / or matrix material, or as a coating where the nanostructure or nanostructure reinforcement is incorporated into the coating or surface of a “normal” substrate material. The nanostructures are incorporated into the material structure either randomly or aligned, within grains, or along or across grain boundaries.

In accordance with one aspect of the present application, a solar photovoltaic cell is disclosed. The semiconductor material of the solar photovoltaic cell includes an inter-digitated nanostructure of a charge transport material and an optical absorbing material. The charge transport material is formed by anodization of a metal, preferably a transition metal. The resultant charge transport material has an array of discrete, substantially parallel and cylindrical pores formed therein. These pores are filled with the optical semiconductor material, which can include a solution of organic semiconducting materials or an inorganic semiconducting oxide material.

The invention belongs to the new field of chemical engineering, and particularly relates to a nano material with clay as a carrier and perovskite type compound nano particles as active components and a preparation method and application thereof to the field of optical coupling-SCR denitration. Lanthanum nitrate, nickel nitrate, ferric nitrate, citric acid and the clay are added to deionized water to be stirred, then the mixture is transferred into a water bath kettle to evaporate to obtain wet gel, and the nano material can be obtained through drying, calcining and drying. The composite is adopted as a catalyst for photocatalytic denitration, and compared with traditional SCR denitration, the amount of adopted NH3 is reduced, and the conversion efficiency on NO at low temperature is improved.

The present invention is directed to a composition useful for making homogeneously mineralized self assembled peptide-amphiphile nanofibers and nanofiber gels. The composition is generally a solution comprised of a positively or negatively charged peptide-amphiphile and a like signed ion from the mineral. Mixing this solution with a second solution containing a dissolved counter-ion of the mineral and / or a second oppositely charged peptide amphiphile, results in the rapid self assembly of the peptide-amphiphiles into a nanofiber gel and templated mineralization of the ions. Templated mineralization of the initially dissolved mineral cations and anions in the mixture occurs with preferential orientation of the mineral crystals along the fiber surfaces within the nanofiber gel. One advantage of the present invention is that it results in homogenous growth of the mineral throughout the nanofiber gel. Another advantage of the present invention is that the nanofiber gel formation and mineralization reactions occur in a single mixing step and under substantially neutral or physiological pH conditions. These homogeneous nanostructured composite materials are useful for medical applications especially the regeneration of damaged bone in mammals. This invention is directed to the synthesis of peptide-amphiphiles with more than one amphiphilic moment and to supramolecular compositions comprised of such multi-dimensional peptide-amphiphiles. Supramolecular compositions can be formed by self assembly of multi-dimensional peptide-amphiphiles by mixing them with a solution comprising a monovalent cation.

A block copolymer, preferably a block copolymer such as poly(isoprene-block-ethylene oxide), PI-b-PEO, is used as a structure directing agent for a polymer derived ceramic (PDC) precursor, preferably a silazane, most preferably a silazane commercially known as Ceraset. The PDC precursor is preferably polymerized after mixing with the block copolymer to form a nanostructured composite material. Through further heating steps, the nanostructured composite material can be transformed into a nanostructured non-oxide ceramic material, preferably a high temperature SiCN or SiC material.

The present invention is directed to a composition useful for making homogeneously mineralized self assembled peptide-amphiphile nanofibers and nanofiber gels. The composition is generally a solution comprised of a positively or negatively charged peptide-amphiphile and a like signed ion from the mineral. Mixing this solution with a second solution containing a dissolved counter-ion of the mineral and / or a second oppositely charged peptide amphiphile, results in the rapid self assembly of the peptide-amphiphiles into a nanofiber gel and templated mineralization of the ions. Templated mineralization of the initially dissolved mineral cations and anions in the mixture occurs with preferential orientation of the mineral crystals along the fiber surfaces within the nanofiber gel. One advantage of the present invention is that it results in homogenous growth of the mineral throughout the nanofiber gel. Another advantage of the present invention is that the nanofiber gel formation and mineralization reactions occur in a single mixing step and under substantially neutral or physiological pH conditions. These homogeneous nanostructured composite materials are useful for medical applications especially the regeneration of damaged bone in mammals. This invention is directed to the synthesis of peptide-amphiphiles with more than one amphiphilic moment and to supramolecular compositions comprised of such multi-dimensional peptide-amphiphiles. Supramolecular compositions can be formed by self assembly of multi-dimensional peptide-amphiphiles by mixing them with a solution comprising a monovalent cation.

Collections of composite particles comprise inorganic particles and another composition, such as a polymer and / or a coating composition. In some embodiments, the composite particles have small average particle sizes, such as no more than about 10 microns or no more than about 2.5 microns. The composite particles can have selected particle architectures. The inorganic particles can have compositions selected for particular properties. The composite particles can be effective for printing applications, for the formation of optical coatings, and other desirable applications.

Compositions comprising a highly dispersed mixture of nanostructures and polymeric materials in a solvent or suspension medium, composites made therefrom having enhanced mechanical, thermal and electronic properties, and methods for making such composites are provided.

An exemplary embodiment of the present invention provides a thermal interface material for providing thermal communication between a heat sink and a heat source. The thermal interface material comprises a plurality of polymer nanofibers having first ends and second ends. The first ends can be positioned substantially adjacent to the heat source. The second ends can be positioned substantially adjacent to the heat sink. The plurality of polymer nanofibers can be aligned substantially perpendicular to at least a portion of the heat source and the heat sink.

The present invention is related to a nano-structured composite material and process of making for air detoxing and deodoring in enclosed spaces to prevent harmful chemicals in the air from damaging human health. The nano-structured composite material consists of nano-porous carbon, zeolites with sub nano-size pores and at least 1 other component chosen from nano-porous rare earth oxides and nano-sized catalysts, and is made into highly efficient configurations with high geometric surface and low resistance air flow channels. The synergetic action of those nano-structured components can effectively remove toxic chemicals including, but not limited to formaldehyde, benzene, toluene, xylene, propene, butadiene, acetone, carbon monoxide, nitric oxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, ammonia, alcohols, chlorine, mercaptans, as well as bad odors, such cigarette smoke and bathroom / toilet smells.

A method is disclosed for producing an energetic metastable nano-composite material. Under pre-selected milling conditions a mixture of powdered components are reactively milled. These components will spontaneously react at a known duration of the pre-selected milling conditions. The milling is stopped at a time at which the components have been compositionally homogenized to produce nanocomposite powder, but prior to said known duration, and thereby before the spontaneous reaction occurs. The milled powder is recovered as a highly reactive nanostructured composite for subsequent use by controllably initiating destabilization thereof.

Provided herein are silicon-carbon nanostructured composites, precursors thereof, and processes for manufacturing such materials. Also provided herein are applications of such silicon-carbon composites, including uses in lithium ion batteries and anodes thereof.

The present invention relates to nanostructured composites comprising a nanotube network which is at least partially embedded within a carbon layer. The present invention particularly relates to conducting nanostructured composites for use in the fields of energy conversion, energy storage and also the biomedical field. The present invention also relates to a process via CVD of carbon onto a catalyst layer on a substrate.

A nanostructured composite anode with nano gas channel and an atmosphere plasma spray manufacturing method thereof are disclosed. The anode consists of a porous base material and a composite film with nano gas channels above the porous base material while the composite film has a plurality of nano gas pores and a plurality of nano gas channels. The manufacturing method according to the present invention includes the steps of: provide micron-sized agglomerated and nanostructured powders having mixture of nano oxide particles and a binder; heat the micron-sized agglomerated and nanostructured powders into melt or semi-melt oxide mixture; spray the melt or semi-melt oxide mixture on a porous base material; and generate the nanostructured anode composite film with nano gas channels through hydrogen reduction. The anode of the present invention increases the electrochemical activity and slows down nickel particle aggregation effect under high temperature environment.

The invention belongs to the field of the energy and chemical industry and particularly relates to a preparation method of a nanometer material using clay as a carrier and using a perovskite type compound as an active component and application of the nanometer material in photocatalytic degradation of antibiotics.Lanthanum nitrate, ferric nitrate, cerous nitrate, citric acid and the clay are added to deionized water and are mixed, then the mixture is transferred to a water bath kettle for evaporation to obtain wet gel, and drying, calcinations and dry grinding are performed to obtain the lanthanum ferrite / clay nano-structure composite material.The antibiotics are subjected to the photocatalytic degradation by adopting the composite material and can be rapidly degraded under visible light by utilizing the high catalytic activity of (cerium doped) lanthanum ferrite.The clay carrier facilitates antibiotic molecular adsorption in the antibiotic degradation process, the antibiotics are in contact with the lanthanum ferrite after being absorbed to the catalyst surface, and antibiotic molecules are decomposed under visible light irradiation to produce other active species.

The invention belongs to the technical field of supported composites and particularly relates to a preparation method and an application of a nanomaterial taking bismuth tungsten as an active component. Bismuth nitrate, sodium tungstate and expanded graphite are added to deionized water while stirring, then the mixture is transferred to a reaction kettle to have a heat preservation reaction under the hydrothermal condition, water washing, alcohol washing, drying and grinding are performed, and thus the bismuth tungstate / expanded graphite sheet nanocomposite is obtained. The composite is high in catalytic activity and can be applied to photocatalytic degradation of organic matters; besides, the reduction of the particle size of single bismuth tungstate particles on a supporter is effectively controlled, and agglomeration is fully avoided when prepared small-particle bismuth tungstate is supported on other clay supporters.

The invention discloses a method for producing a carbon composite material, which includes the step of providing at least one carbon nanostructured composite material onto the surface of LiFePO4 particles to produce a LiFePO4 / carbon nanostructured composite material. The carbon nanostructured composite material is obtained by synthesizing at least one nanostructured composite material to form the carbon nanostructured composite material.

The invention relates to a preparation process of a multiple TiO2 nanotube / PbS / CuS nanocomposite used for quantum dot sensitized solar cells. The multiple TiO2 nanotube / PbS / CuS nanocomposite is prepared mainly by combining a chemical bath method and a hydrothermal method. The method comprises the following steps: shearing and grinding a titanium plate and carrying out ultrasonic cleaning and decontamination in acetone or anhydrous ethanol solution; flushing the cleaned titanium plate with deionized water, and air-drying; placing cleaned titanium plate in the well prepared electrolyte for carrying out electrochemical anodizing; and placing anodized sample of the semi-wall type titanium dioxide nanotube array in the hydrogen peroxide solution for soaking for certain time, and sequentially compounding nanoparticles of PbS / CuS with titanium oxide nanotube by adopting chemical bath method and the hydrothermal method. The method is simple in process, the prepared multi-nano structure is novel, and the conversion efficiency of the solar cell prepared through the structure is improved greatly, thus being beneficial to improvement of performances of quantum dot sensitized solar cells.

The invention relates to composite polyurethane foam. The composite polyurethane foam contains a carbon nanostructured compound, the carbon nanostructured compound contains carbon and 0.5-4wt% of first non-carbon non-oxygen substances, the first non-carbon non-oxygen substances comprise one or at least two of a simple substance and compounds of a first non-carbon non-oxygen element, the first non-carbon non-oxygen element is selected from P, Si, Ca, Al and Na, and a peak height ratio of a carbon peak G to peak D in a Raman spectrum of the carbon nanostructured compound is 1-20. Through use of the specific carbon nanostructured compound, a simple mixing process of the specific carbon nanostructured compound and polyether polyol is realized, and then the mixture and polyisocyanate undergo a polymerization reaction so that polyurethane is compounded. The preparation method is free of a carbon nanostructured compound formation process, has simple processes and can realize seamless connection with the existing equipment.

The invention discloses a method that detects Staphylococcus aureus enterotoxin by a composite nano metal structure, which comprises the following steps: (1) a substrate is chosen and cleaned, and a polystyrene nano-sphere layer is self-assembled on the substrate; (2) the produced self-assembled polystyrene nano-sphere layer is taken as a die, and a silver film and a gold film are vapor-deposited on the self-assembled layer through a vapor deposition method; (3) the self-assembled polystyrene nano-sphere layer is removed through a Lift-off technique, and the nano metal array structure is obtained after array transformation; (4) the nano metal layer is activated by adopting a non-directional covalent connection method, and a biological molecular film layer that resists SE sheep monoclonal antibodies IgG is formed on the surface of the nano metal structure; (5) extinction spectrum of the nano metal structure is extracted by a spectrograph, and an extinction spectrum peak before the biological combination is obtained; (6) a solution to be detected is dropped on the substrate surface and blow-dried after the reaction, and step (5) is repeated; (7) the extinction spectrum peaks that are obtained before and after step (6) are contrasted, thus determining whether the solution to be detected contains SE. The method that detects the Staphylococcus aureus enterotoxin with the composite nano metal structure does not need the purifying and the marking of the solution to be detected, and can be applied into the quick detection of SE or other toxins in the same type.

The invention relates to a graphene multistage nano-structure composite material preparation method and application, in particular to a graphene / graphite-like-phase carbon nitride / palladium nano particle multistage nano-structure composite material preparation method and application and aims to solve technical problems of low methanol oxidation catalytic activity and small specific surface area atpresent. The method includes: firstly, preparing graphene oxide, Na2PdCl4 solution and g-C3N4 dispersion liquid; secondly, preparing electrolyte; thirdly, performing electro-deposition. A compositionmaterial prepared according to the method serves as a methanol oxidation catalyst. The preparation method has advantages of technical simplicity, greenness, environmental friendliness and convenienceand quickness in operation. The graphene / g-C3N4 / palladium nano particle multistage nano-structure composite material can be extensively applied to the field of electrocatalytic oxidation.

A method is disclosed for producing an energetic metastable nano-composite material. Under pre-selected milling conditions a mixture of powdered components are reactively milled. These components will spontaneously react at a known duration of the pre-selected milling conditions. The milling is stopped at a time at which the components have been compositionally homogenized to produce nanocomposite powder, but prior to said known duration, and thereby before the spontaneous reaction occurs. The milled powder is recovered as a highly reactive nanostructured composite for subsequent use by controllably initiating destabilization thereof.

A photocatalytic coating composition and method of coating articles, the composition containing solvents for rapid evaporation at room temperature, polyalkylphenylsiloxane, xylene, nano densified hydrophilic fumed silica, nanostructured composite photocatalyst powder and nano inorganic anti-bacteria powder. The coating may be applied by conventional coating methods to organic or inorganic structured surfaces where photocatalytic activity is desired, such as in a forced air-circulating environment. Once applied, the coating quickly dries to leave an adherent, flexible, durable, and long-lasting photocatalytic coating having a large surface area and exhibiting high surface activity against pathogens and pollutants such as bacteria, viruses, mold, fungi, and volatile organic compounds.

A method for manufacturing an inorganic-nano structure composite, a method for manufacturing a cabon nanotube composite by using the same, and a carbon nanotube composite manufactured by the same are provided. The method for manufacturing the inorganic-nano structure composite comprises a step of doping pentavalent elements on the nanostructure; and a step of growing the inorganic material from the doping points of the pentavalent elements by dipping the nanostructure on which the pentavalent elements are doped into a precursor solution of the inorganic material, and according to the present invention the pentavalent elements such as nitrogen are doped on the nanostructure and is utilized as the crystallization point of the inorganic material, instead of forming the separate coating layer to the organic-based nanostructure, or binding the binding group to the surface.

The invention belongs to the field of novel chemical materials and especially relates to a lanthanum cobaltate / attapulgite / reduced graphene oxide nano-structure composite material, a preparation method, and an application thereof. The preparation method includes the steps of: 1) preparing lanthanum cobaltate / attapulgite through a sol-gel process, adding the lanthanum cobaltate / attapulgite to deionized water and acidifying the liquid and regulating pH value to obtain a lanthanum cobaltate / attapulgite water solution carrying positive charges; 2) reducing graphite oxide with hydrazine hydrate to produce reduced graphene oxide carrying negative charges, and mixing the reduced graphene oxide with the lanthanum cobaltate / attapulgite water solution, stirring the mixture in water bath, performing a reaction, and drying a reaction product to obtain a perovskite / attapulgite / reduced graphene oxide composite material. With the composite material as a catalyst for performing photo-SCR denitration, conversion rate on NOx in a low-temperature zone (100-200 DEG C) can reach more than 95%.

The invention provides nanostructure composite porous silicon and carbon materials, and also provides carbon nanofiber arrays having a photonic response in the form of films or particles. Composite materials or carbon nanofiber arrays of the invention are produced by a templating method of the invention, and the resultant nanomaterials have a predetermined photonic response determined by the pattern in the porous silicon template, which is determined by etching conditions for forming the porous silicon. Example nanostructures include rugate filters, single layer structures and double layer structures. In a preferred method of the invention, a carbon precursor is introduced into the pores of a porous silicon film. Carbon is then formed from the carbon precursor. In a preferred method of the invention, liquid carbon-containing polymer precursor is introduced into the pores of an porous silicon film The precursor is thermally polymerized to form a carbon-containing polymer in the pores of the porous silicon film, which is then thermally carbonized to produce the nano structured composite material. A carbon nanofiber array is obtained by dissolving the porous silicon. A carbon nanofiber array can be maintained as a film in liquid, and particles can be formed by drying the material.