| Entries |
| Document | Title | Date |
|---|
| 20080213159 | Nanotube separation methods - A nanotube separation method includes depositing a tag on a nanotube in a nanotube mixture. The nanotube has a defect and the tag deposits at the defect where a deposition rate is greater than on another nanotube in the mixture lacking the defect. The method includes removing the tagged nanotube from the mixture by using the tag. As one option, the tag may contain a ferromagnetic material and the removing may include applying a magnetic field. As another option, the tag may contain an ionic material and the removing may include applying an electric field. As a further option, the tag may contain an atom having an atomic mass greater than the atomic mass of carbon and the removing may include applying a centrifugal force to the nanotube mixture. Any two or more of the indicated removal techniques may be combined. | 09-04-2008 |
| 20080213160 | Method of Synthesising a Support Catalyst for the Production of Carbon Nanotubes - The present invention relates to a method for synthesising a catalyst with a view to the production of multi-wall nanotubes comprising the following stages:
| 09-04-2008 |
| 20080213161 | Carbon nanotube pastes and methods of use - Discernable pastes comprising single-walled carbon nanotubes (SWNT) in water or in an organic solvent are prepared. The method of preparing the Discernable pastes comprises in general the following steps: a) removal of the catalyst used during the synthesis of SWNT; b) while the SWNT are still wet, addition of the appropriate amount of solvent, in a solvent/SWNT ratio which preferably varies between 30:1 and 100:1, depending on the desired viscosity of the paste; and c) high-energy horn sonication with a dismembrator probe. | 09-04-2008 |
| 20080260616 | Bulk Separation of Carbon Nanotubes by Bandgap - The present invention is directed to methods of separating carbon nanotubes (CNTs) by their electronic type (e.g., metallic, semi-metallic, and semiconducting). Perhaps most generally, in some embodiments, the present invention is directed to methods of separating CNTs by bandgap, wherein such separation is effected by interacting the CNTs with a surface such that the surface interacts differentially with the CNTs on the basis of their bandgap, or lack thereof. In some embodiments, such methods can allow for such separations to be carried out in bulk quantities. | 10-23-2008 |
| 20080260617 | FUNCTIONALIZED FEW-WALLED CARBON NANOTUBES (FWNTs) AND METHODS OF MAKING AND USING THE SAME - Few-walled carbon nanotubes (FWNTs) can be synthesized in a simple chemical vapor deposition (CVD) system using a mixture of methanol and ethanol as the carbon source. In preferred embodiments, the present invention uses an ethanol/methanol mixture as the carbon source so that few walled nanotubes (FWNTs) with high purity can be prepared following a simplified purification process. Under the growth conditions of the present invention, ethanol is believed to act as the carbon source while methanol is believed to act as a “carbonaceous impurity remover” to remove the impurities deposited on a support (e.g., MgO) and thereby hinder the formation of such impurities. | 10-23-2008 |
| 20080274035 | REVERSIBLE OXIDATION OF CARBON NANOTUBES - Carbon nanotubes have been reversibly and readily oxidized and reduced with common chemicals in solution, thereby allowing the nanotubes to be used as catalysts for chemical reactions and as stable charge storage devices. | 11-06-2008 |
| 20080279751 | METHOD FOR PREPARING UNIFORM SINGLE WALLED CARBON NANOTUBES - Methods of preparing single walled carbon nanotubes from a metal catalyst having deposited thereon fullerenes are provided. Fullerenes are deposited onto a metal catalyst precursor or metal catalyst. In the presence of a carbon containing gas, the metal catalyst precursor/fullerene composition is then exposed to conditions suitable for reducing the metal catalyst precursor, for subliming the fullerene and for growing single walled carbon nanotubes. The fullerenes form the end caps for the resulting single walled carbon nanotubes, which are uniform in diameter. | 11-13-2008 |
| 20080279752 | Method for producing a single-wall carbon nanotube - A method for producing a single-wall carbon nanotube, comprising contacting an organic dehydrated alcohol with a catalyst in a closed space in vacuum at a temperature of 600 to 900° C. | 11-13-2008 |
| 20080299029 | Gas-Phase Process for Growing Carbon Nanotubes Utilizing Sequential Multiple Catalyst Injection - This invention relates generally to a method and apparatus for making carbon nanotubes from a flowing gaseous carbon-containing feedstock, such as CO, at superatmospheric pressure and at temperatures between about 500° C. and about 2000° C. utilizing a reactor wherein the flowing carbon-containing feedstock sequentially passes multiple points of catalyst injection, where the catalyst is provided by the decomposition of one or more catalyst precursor species, such as Fe(CO) | 12-04-2008 |
| 20080299030 | HIGHLY ACCESSIBLE, NANOTUBE ELECTRODES FOR LARGE SURFACE AREA CONTACT APPLICATIONS - An highly porous electrically conducting film that includes a plurality of carbon nanotubes, nanowires or a combination of both. The highly porous electrically conducting film exhibits an electrical resistivity of less than 0.1 O·cm at 25 C and a density of between 0.05 and 0.70 g/cm | 12-04-2008 |
| 20090004094 | METHOD FOR CUTTING FULLERENE NANOTUBES - This invention relates generally to cutting fullerene nanotubes. In one embodiment, the present invention provides for preparation of homogeneous populations of short fullerene nanotubes by cutting and annealing (reclosing) the nanotube pieces followed by fractionation. The cutting and annealing processes may be carried out on a purified nanotube bucky paper, on felts prior to purification of nanotubes or on any material that contains fullerene nanotubes. In one embodiment, oxidative etching with concentrated nitric acid is employed to cut fullerene nanotubes into shorter lengths. The annealed nanotubes may be disbursed in an aqueous detergent solution or an organic solvent for the fractionation. Closed tubes can also be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the end caps. | 01-01-2009 |
| 20090022651 | Process and Apparatus for Producing Carbon Nanotube - Carbon nanotubes are more efficiently produced with a simpler apparatus. The process, which is for producing carbon nanotubes by the combustion method, is characterized by comprising: a step in which a catalyst-supporting powder comprising a base powder and a catalyst supported on the surface thereof is prepared; a step in which the catalyst-supporting powder is deposited on a porous support ( | 01-22-2009 |
| 20090035208 | Nanoporous Catalyst Particles, the Production Thereof and Their Use - The invention relates to nanoporous catalyst particles having a spherical and/or spheroidal secondary structure, which contain, as catalytically active constituents, transition metals and/or oxides or precursors thereof. The invention also relates to a method for producing the nanoporous catalyst particles, during which, by means of a precipitation process, precursors with a spherical and/or spheroidal preliminary shape are produced from soluble compounds of the active constituents, and these morphologically pre-shaped precursors are, in a thermal activation step, transformed into nanoporous catalyst particles having a spherical and/or spheroidal secondary structure. The inventive catalyst particles can be used in the production of ceramic materials, as electrode materials in electrochemical cells or in fuel cells, as storage materials for chemical species and, in particular, in the production of carbon nanoparticles in the form of small tubes or fibers. | 02-05-2009 |
| 20090035209 | METHOD OF MANUFACTURING CARBON NANOTUBE - According to a method of manufacturing carbon nanotubes, minute concavities and convexities are formed at a surface of a substrate, a catalyst metal layer having a predetermined film thickness is formed on the surface having the concavities and convexities, the substrate is subject to a heat treatment at a predetermined temperature to change the catalyst metal layer into a plurality of isolated fine particles. The catalyst metal fine particles have a uniform particle diameter and uniform distribution. Then, the substrate supporting the plurality of fine particles is placed in a carbon-containing gas atmosphere to grow carbon nanotubes on the catalyst metal fine particles by a CVD method using the carbon-containing gas. The carbon nanotubes can be formed to have a desired diameter and a desired shell number with superior reproducibility. | 02-05-2009 |
| 20090041652 | METHOD FOR SEPARATING CARBON NANOTUBES, METHOD FOR DISPERSING CARBON NANOTUBES AND COMPOSITIONS USED FOR THE METHODS - The separation of carbon nanotubes into metallic carbon nanotubes and semiconducting carbon nanotubes is made to be possible simultaneously with the dispersion of the carbon nanotubes by using viologen. | 02-12-2009 |
| 20090060827 | METHOD FOR GROWING CARBON NANATUBES HAVING A PREDETERMINED CHIRALITY - A method for growing carbon nanotubes having a determined chirality includes fragmenting at least one initial carbon nanotube having a determined chirality to obtain at least two portions of carbon nanotube. Each portion has a free growth end. Atoms of carbon are supplied with an autocatalyst addition of the atoms of carbon at the free growth end of each portion of nanotube to determine an elongation or growth of the nanotube. | 03-05-2009 |
| 20090081113 | METHOD AND APPARATUS FOR GENERATING A CARBON NANOTUBE - In an apparatus and method of generating a carbon nanotube (CNT), a process chamber is heated to a target temperature and a catalyst powder is supplied into the heated process chamber. The catalyst powder moves in a first direction in the process chamber. A source gas is supplied into the process chamber in a second direction opposite to the first direction, so that the source gas delays the movement of the catalyst powder in the first direction and is reacted with the catalyst powder in the process chamber to thereby produce the CNT in the process chamber. Accordingly, the flow of the source gas against the flow of the catalyst powder reduces the drop velocity of the catalyst powder. Therefore, the source gas and the catalyst powder may be reacted with each other for a sufficiently long time. | 03-26-2009 |
| 20090087371 | Apparatus for manufacturing carbon nanotubes and method of manufacturing carbon nanotubes with the same - Provided are an apparatus for manufacturing carbon nanotubes and a method of manufacturing carbon nanotubes with the apparatus. A plurality of carbon-nanotube-synthesizing units are disposed in series to continuously perform a carbon-nanotube-synthesizing process. Thus, carbon nanotubes having a uniform quality can be synthesized. | 04-02-2009 |
| 20090110627 | GRAPHENE SHEET AND METHOD OF PREPARING THE SAME - An economical method of preparing a large-sized graphene sheet having a desired thickness includes forming a film, the film comprising a graphitizing catalyst; heat-treating a gaseous carbon source in the presence of the graphitizing catalyst to form graphene; and cooling the graphene to form a graphene sheet. A graphene sheet prepared according to the disclosed method is also described. | 04-30-2009 |
| 20090136412 | Method of manufacturing carbon nanotube - Carbon atoms are fed to a catalytic metal particle | 05-28-2009 |
| 20090169466 | Methods of producing carbon nanotubes using peptide or nucleic acid micropatterning - The methods, apparatus and systems disclosed herein concern ordered arrays of carbon nanotubes. In particular embodiments of the invention, the nanotube arrays are formed by a method comprising attaching catalyst nanoparticles | 07-02-2009 |
| 20090175778 | SPHEROIDAL AGGREGATES COMPRISING SINGLE-WALL CARBON NANOTUBES AND METHOD FOR MAKING THE SAME - A method for separating single-wall carbon nanotubes from an aqueous slurry comprises adding a water-immiscible organic solvent to an aqueous slurry comprising single-wall carbon nanotubes, isolating at least some of the single-wall carbon nanotubes in the solvent, and removing the solvent from the single-wall carbon nanotubes to form dried single-wall carbon nanotubes. A spheroidal aggregate of single-wall carbon nanotubes is formed wherein the aggregate is approximately spherical and has a diameter in a range of about 0.1 and about 5 mm, and wherein the aggregate contains at least about 80 wt % single-wall carbon nanotubes. The spheroidal aggregates of single-wall carbon nanotubes are easily handled in industrial processes and are redispersable to single-wall carbon nanotubes and/or ropes of single-wall carbon nanotubes. This invention can also be applied to multi-wall carbon nanotubes. | 07-09-2009 |
| 20090208403 | Novel catalyst to manufacture carbon nanotubes and hydrogen gas - This invention relates primarily to a novel method to manufacture single/multi/fibers carbon filaments (nano tubes) in pure form optionally with antiferromagnetic and electrical property wherein the byproduct is hydrogen gas resulting in reduction of environmental carbon emissions by at least 20%; both carbon filaments and resultant exhaust are useful products. | 08-20-2009 |
| 20090257943 | Method of Selective Purification of Armchair Carbon - The present invention provides a method of selectively extracting metallic armchair carbon nanotubes alone from the mixture of carbon nanotubes of mixed chiralities, wherein vacant lattice defects are removed from armchair carbon nanotubes alone using the fact that the vacant lattice defects of zigzag carbon nanotubes are hard to diffuse in the axial direction of nanotubes compared with those of armchair carbon nanotubes. Since vacant lattice defects remaining on zigzag carbon nanotubes are active, the tube structures are easily destroyed and decomposed by oxidation etc. Thus it is possible to extract armchair carbon nanotubes alone from the mixture of carbon nanotubes of mixed chiralities. | 10-15-2009 |
| 20090257944 | METHOD FOR PRODUCING CARBON NANOTUBE - A method for producing carbon nanotubes uses a polymer as a raw material to undergo in situ thermal decomposition. The method includes steps of mixing the polymer and metallic catalyst through a multiple heating stage process of in-situ thermal decomposition to carbonize the polymer and release carbon elements to produce carbon nanotubes. Advantages of the present invention include easy to prepare, low temperature in manipulation, low production cost, and high safety. | 10-15-2009 |
| 20090263309 | SHEAR REACTOR FOR VORTEX SYNTHESIS OF NANOTUBES - Continuous nanotube synthesis by vortex deposition occurs in an axially-fed shear reactor comprising coaxial counter-rotating disk impeller/electrodes charged as anodes. Nanotube evolving ends, charged as cathodes, point toward the anode axis of rotation and protrude into the space between the anodes. Radial vortices in a shear layer of the space, between the boundary layers on the impeller/electrodes, spin cations to be deposited on evolving nanotube ends approximately at the vortex axis, so deposition is by swirling cathode fall. The evolved nanotubes are extracted mechanically, and they conduct electrons from charging means to charge the evolving ends as cathodes. The preferential synthesis of metallic carbon nanotubes is due to the greater resistance of non-metallic structures such as graphite or semiconductive structures. Ozone serves to oxidize non-metallic structures and to functionalize the loose ends of nanotube fragments. Dopants can be added to the evolving nanotubes by introduction of dopants at the periphery because the evolving ends are maintained in stable locations. Or dopants can be added by the simultaneous decomposition of gases (for example, carbon dioxide and nitrogen gas) within the reactor or in an external reactor. | 10-22-2009 |
| 20090274610 | Method for growing carbon nanowalls - A method for growing carbon nanowalls on a base material is disclosed. The method comprises mixing a predetermined amount of a hydrocarbon gas with a predetermined amount of at least one non hydrocarbon gas; placing said base material in a reaction chamber having a first portion and a second portion, first portion is extended from a first end of reaction chamber to first end of base material; creating a radical in reaction chamber which comprises a hydrocarbon radical and a non hydrocarbon radical; applying the radical to the base material; and growing carbon nanowalls on said base material based on said hydrocarbon radical. | 11-05-2009 |
| 20090274611 | CARBON FIBROUS STRUCTURE - A method for forming a carbon fibrous structure having a granular part, to which a plurality of carbon fibers are bound, includes heating a mixture of a carbon source and a catalyst at a temperature between 800 and 1300° C. to produce a first intermediate, and heating the first intermediate to remove hydrocarbons, at a temperature between 800 and 1200° C. to produce a first product. The method further includes heating the first product at a temperature between 2400 and 3000° C. to produce a final product. The carbon source includes at least two compounds having different decomposition temperatures or a compound that can produce, when heated at a temperature between 800 and 1300° C., at least two components having different decomposition temperatures. The catalyst may include an iron-containing catalyst, which may be introduced into a reaction chamber in a gaseous state, without being deposited on a substrate. | 11-05-2009 |
| 20090291041 | METHODS FOR SEPERATING CARBON NANOTUBES BY ENHANCING THE DENSITY DIFFERENTIAL - A method for separating carbon nanotubes comprises: providing a mixture of carbon nanotubes; introducing an organic molecule having an end group capable of being chelated by a metal ion to the mixture of carbon nanotubes to covalently bond the organic molecule to at least one of the mixture of carbon nanotubes; and introducing a metal salt to the mixture of carbon nanotubes to chelate the end group of the organic molecule with the metal ion of the metal salt; and centrifuging the mixture of carbon nanotubes to cause the separation of the carbon nanotubes based on a density differential of the carbon nanotubes. | 11-26-2009 |
| 20090324483 | Separation of carbon nanotubes into chirally enriched fractions - A mixture of single-walled carbon nanotubes (“SWNTs”) is separated into fractions of enriched chirality by preparing an aqueous suspension of a mixture of SWNTs and a surfactant, injecting a portion of the suspension on a column of separation medium having a density gradient, and centrifuging the column. In some embodiments, salt is added prior to centrifugation. In other embodiments, the centrifugation is performed at a temperature below room temperature. Fractions separate as colored bands in the column. The diameter of the separated SWNTs decreases with increasing density along the gradient of the column. The colored bands can be withdrawn separately from the column. | 12-31-2009 |
| 20100008843 | MULTI-STEP PURIFICATION OF SINGLE-WALL CARBON NANOTUBES - The present invention relates to processes for the purification of single-wall carbon nanotubes (SWNTs). Known methods of single-wall carbon nanotube production result in a single-wall carbon nanotube product that contains single-wall carbon nanotubes in addition to impurities including residual metal catalyst particles and amounts of small amorphous carbon sheets that surround the catalyst particles and appear on the side of the single-wall carbon nanotubes. The present purification processes remove the extraneous carbon as well as metal-containing residual catalyst particles. | 01-14-2010 |
| 20100055023 | MANUFACTURING CARBON NANOTUBE PAPER - Techniques and apparatuses for making carbon nanotube (CNT) papers are provided. In one embodiment, a method for making a CNT paper may include disposing a structure having an edge portion including a relatively sharp edge into a CNT colloidal solution and withdrawing the structure from the CNT colloidal solution. | 03-04-2010 |
| 20100055024 | Method for making carbon nanotube film - The present invention relates to a method for making a carbon nanotube film. The method includes the following steps. An array of carbon nanotubes is formed on a substrate. The array of carbon nanotubes is pressed by a pressure head to form a carbon nanotube film having properties identical in all directions parallel to a surface of the carbon nanotube film. | 03-04-2010 |
| 20100074832 | METHODS FOR PURIFYING CARBON MATERIALS - Methods of purifying samples are provided that are capable of removing carbonaceous and noncarbonaceous impurities from a sample containing a carbon material having a selected structure. Purification methods are provided for removing residual metal catalyst particles enclosed in multilayer carbonaceous impurities in samples generate by catalytic synthesis methods. Purification methods are provided wherein carbonaceous impurities in a sample are at least partially exfoliated, thereby facilitating subsequent removal of carbonaceous and noncarbonaceous impurities from the sample. Methods of purifying carbon nanotube-containing samples are provided wherein an intercalant is added to the sample and subsequently reacted with an exfoliation initiator to achieve exfoliation of carbonaceous impurities. | 03-25-2010 |
| 20100092369 | METHOD FOR ENHANCING GROWTH OF CARBON NANOTUBES - A method for fabricating a plurality of carbon nanotube structures having enhanced length is disclosed. Several steps are involved in this method. First, a substrate is provided. Next, a non-catalytic metal layer is formed on the substrate. Then, a catalytic metal layer is formed on the non-catalytic metal layer. After that, the catalytic metal layer is subjected to ultrasonication and exposure to water. Finally, the plurality of carbon nanotube structures is formed on the substrate in the presence of the catalytic metal layer. In this embodiment, the ultrasonication and exposure to water step includes submerging the catalytic metal layer in a liquid bath, ultrasonicating the catalytic metal layer and the liquid bath, and exposing the catalytic metal layer to water. | 04-15-2010 |
| 20100111813 | Method for Synthesizing Carbon Nanotubes - A method for preparing a precursor solution for synthesis of carbon nanomaterials, where a polar solvent is added to at least one block copolymer and at least one carbohydrate compound, and the precursor solution is processed using a self-assembly process and subsequent heating to form nanoporous carbon films, porous carbon nanotubes, and porous carbon nanoparticles. | 05-06-2010 |
| 20100111814 | Chirality-based separation of carbon nanotubes - A mixture of carbon nanotubes is separated into fractions that are enriched with a desired chirality by exposing a solution or suspension of the carbon nanotubes to a separation medium. A portion of the mixture forms complexes with, and becomes attached to, the separation medium. Exposure to other reagents results in dissociation of the complexes and release of the nanotubes from the separation medium. | 05-06-2010 |
| 20100119434 | METHOD OF FORMING NANOTUBES - Methods for the formation of nanotube from thin films are provided. The methods involve the adsorption of atoms to the surface of the films. The adsorbed atoms introduce surface stress, inducing a curvature in the films. The curvature is sufficient to bring atoms at the edges into sufficiently close proximity to form covalent bonds. Other methods include the step of desorbing the atoms from the surface of the film. The films may comprise a variety of nanomaterials, including graphene sheets and semiconductor thin films. | 05-13-2010 |
| 20100150815 | METHOD AND APPARATUS FOR THE CONTINUOUS PRODUCTION OF CARBON NANOTUBES - The present invention relates to an apparatus for the continuous production of carbon nanotubes (CNT), as well as the method to carry it out. The apparatus for the CNT synthesis includes: two sets or more of tubes to synthesize in its interior the CNT; a set of nozzles for the same number of tubes that each set has, to feed to the interior of the tubes the precursory chemical compounds of the CNT; a furnace to maintain one of the sets to a suitable temperature to allow the formation of the CNT inside the tubes; a system for the detaching and collection of the CNT formed in the previous stage; and a control system, preferably a PLC (PLC by its abbreviation in English) to program the sequence of activities of the equipment. | 06-17-2010 |
| 20100166637 | Type Separation of Single-Walled Carbon Nanotubes via Two-Phase Liquid Extraction - The subject invention provides a two-phase liquid-liquid extraction process that enables sorting and separation of single-walled carbon nanotubes based on (n, m) type and/or diameter. The two-phase liquid extraction method of the invention is based upon the selective reaction of certain types of nanotubes with electron withdrawing functional groups as well as the interaction between a phase transfer agent and ionic moieties on the functionalized nanotubes when combined in a two-phase liquid solution. Preferably, the subject invention enables efficient, bulk separation of metallic/semi-metallic nanotubes from semi-conducting nanotubes. More preferably, the subject invention enables efficient, bulk separation of specific (n, m) types of nanotubes. | 07-01-2010 |
| 20100196247 | METHOD FOR MANUFACTURING CARBON NANOTUBES - A method for manufacturing carbon nanotubes of the present invention includes the steps of: preparing at least one metal selected from a group consisting of iron, cobalt and nickel and an organic compound: and forming carbon nanotubes by using the organic compound as a carbon source, wherein the metal and the organic compound are put into a heating vessel having a substance capable of converting electromagnetic energy into heat, and the organic compound is brought into contact with the metal in a state where the inside of the heating vessel is heated at a temperature of 600° C. to 900° C. by applying the electromagnetic energy to the heating vessel so as to form the carbon nanotubes. | 08-05-2010 |
| 20100196248 | METHOD FOR MANUFACTURING CARBON NANOTUBES - A method for manufacturing carbon nanotubes of the present invention includes the steps of: preparing a metal complex which contains at least one metal selected from a group consisting of iron, cobalt and nickel and an organic compound: and forming carbon nanotubes which contain metal therein by using the organic compound as a carbon source, wherein the carbon nanotubes are formed by putting the metal complex into a heating vessel which has a substance capable of converting electromagnetic energy into heat, and by heating the metal complex using heat which is generated by the heating vessel when electromagnetic energy is applied to the heating vessel. As the metal complex used in a method for manufacturing carbon nanotubes of the present invention, nickel stearate or nickel benzoate can be named, for example. According to the method for manufacturing carbon nanotubes of the present invention, it is possible to manufacture carbon nanotubes using an inexpensive heating device within a short time. | 08-05-2010 |
| 20100233065 | Device and method for production of carbon nanotubes, fullerene and their derivatives - An apparatus and method for the production of nanotubes, fullerene and their derivatives where, in an environment where an inert gas flows at or below atmospheric pressure, a high frequency electromagnetic field is generated and a pure or doped graphite element is subjected to the electromagnetic field and heated to vaporization to form a plasma. | 09-16-2010 |
| 20100233066 | METHOD OF COATING CATALYST METAL LAYER BY USING NUCLEIC ACID AND METHOD OF FORMING NANOCARBON BY USING THE METHOD OF COATING THE CATALYST METAL LAYER - Provided are a method of coating a catalyst metal layer by using a nucleic acid, and a method of forming nanocarbon using the method of coating a catalyst metal layer. The method of coating a catalyst metal layer includes preparing an aqueous solution; the aqueous solution including ions of a transition metal and a nucleic acid; disposing a carbon matrix including carbon, in the aqueous solution, and disposing a catalyst metal layer including a transition metal on a surface of the carbon matrix. | 09-16-2010 |
| 20100239488 | Controlled Placement and Orientation of Nanostructures - A method for controlled deposition and orientation of molecular sized nanoelectromechanical systems (NEMS) on substrates is disclosed. The method comprised: forming a thin layer of polymer coating on a substrate; exposing a selected portion of the thin layer of polymer to alter a selected portion of the thin layer of polymer; forming a suspension of nanostructures in a solvent, wherein the solvent suspends the nanostructures and activates the nanostructures in the solvent for deposition; and flowing a suspension of nanostructures across the layer of polymer in a flow direction; thereby: depositing a nanostructure in the suspension of nanostructures only to the selected portion of the thin layer of polymer coating on the substrate to form a deposited nanostructure oriented in the flow direction. By selectively employing portions of the method above, complex NEMS may be built of simpler NEMSs components. | 09-23-2010 |
| 20100239489 | Methods for Controlling the Quality of Metal Nanocatalyst for Growing High Yield Carbon Nanotubes - Methods are provided for the preparation of single-walled carbon nanotubes using chemical vapor deposition processes. In some aspects, single-walled carbon nanotubes having narrow distribution of diameters are formed by contacting a carbon precursor gas with a catalyst on a support, wherein the catalyst has an average diameter of less than about 2 nm. | 09-23-2010 |
| 20100254885 | Carbon Nanotubes Grown on Bulk Materials and Methods for Fabrication - Disclosed are structures formed as bulk support media having carbon nanotubes formed therewith. The bulk support media may comprise fibers or particles and the fibers or particles may be formed from such materials as quartz, carbon, or activated carbon. Metal catalyst species are formed adjacent the surfaces of the bulk support material, and carbon nanotubes are grown adjacent the surfaces of the metal catalyst species. Methods employ metal salt solutions that may comprise iron salts such as iron chloride, aluminum salts such as aluminum chloride, or nickel salts such as nickel chloride. Carbon nanotubes may be separated from the carbon-based bulk support media and the metal catalyst species by using concentrated acids to oxidize the carbon-based bulk support media and the metal catalyst species. | 10-07-2010 |
| 20100266478 | Metal Nano Catalyst, Method for Preparing the Same and Method for Controlling the Growth Types of Carbon Nanotubes Using the Same - The present invention provides a metal nano catalyst, a method for preparing the same and a method for controlling the growth types of carbon nanotubes using the same. The metal nano catalyst can be prepared by burning an aqueous metal catalyst derivative comprising Co, Fe, Ni or a combination thereof in the presence of a supporting body precursor. | 10-21-2010 |
| 20100278713 | Method of manufacturing a carbon nanotube, and apparatus and system for performing the method - In a method of manufacturing a carbon nanotube, a boat configured to receive substrates is positioned outside of a synthesis space where the carbon nanotube is synthesized. The substrates are loaded into the boat. The boat is then transferred to the synthesis space. A process for forming the carbon nanotube is performed on the substrates in the synthesis space to form the carbon nanotube. Thus, the carbon nanotube may be effectively manufactured. | 11-04-2010 |
| 20100278714 | METHOD FOR SIMPLY SEPARATNG CARBON NANOTUBE - Disclosed are a method and an apparatus for separating metallic CNT and semiconducting CNT, comprising treating with a physical separation means of centrifugation, freezing-thawing-squeezing, diffusion, permeation or the like using a gel containing CNT as a dispersed and isolated state (CNT-containing gel), to thereby make semiconducting CNT exist in gel and make metallic CNT exist in solution. | 11-04-2010 |
| 20100278715 | Systems, Devices, and/or Methods Regarding Specific Precursors or Tube Control Agent for the Synthesis of Carbon Nanofiber and Nanotube - Certain exemplary embodiments can comprise, via a tube control agent (TCA) and a metallic catalyst, producing a carbon nanotube. At least some carbon used to form the carbon nanotube can be obtained from a plant, a cellulose product, and/or a cellulosic product. At least some of the carbon can be converted into powder. | 11-04-2010 |
| 20100290979 | Carbon nanotubes production process - carbon nanotubes can be used in a lot of different applications but the main disadvantage of these tubes are that they are expensive. This invention describes a very simple process for producing carbon nanotubes in large scale. This process is very cheaply. It uses the sonochemical approach for generating carbon nanotubes. It is also shown that this process can be used for large industrialization of sonochemical processes. | 11-18-2010 |
| 20100316556 | MULTISTAGE REACTORS FOR CONTINUOUS PRODUCTION OF CARBON NANOTUBES - The present application provides multistage and multilayer reactors useful for the efficient and continuous production of carbon nanotubes and methods of using the apparatus in the preparation of carbon nanotubes. In one aspect, the multistage reactors include an array of interconnected fluidized-bed reactors. The multilayer reactors include a plurality of reaction zones. | 12-16-2010 |
| 20100316557 | CONTINUOUS EXTRACTION TECHNIQUE FOR THE PURIFICATION OF CARBON NANOMATERIALS - Systems and methods for the purification of carbon nanotubes (CNTs) by continuous liquid extraction are disclosed. Carbon nanotubes are introduced to a flow of liquid that enables the separation of CNTs from impurities due to differences in the dispersibility of the CNTs and the impurities within the liquid. Examples of such impurities may include amorphous carbon, graphitic nanoparticles, and metal containing nanoparticles. The continuous extraction process may be performed in one or more stages, where one or more of extraction parameters may be varied between the stages of the continuous extraction process in order to effect removal of selected impurities from the CNTs. The extraction parameters may include, but are not limited to, the extraction liquid, the flow rate of the extraction liquid, the agitation of the liquid, and the pH of the liquid, and may be varied, depending on the impurity to be removed from the CNTs. | 12-16-2010 |
| 20100316558 | DEVICE STRUCTURE OF CARBON FIBERS AND MANUFACTURING METHOD THEREOF - An aggregate structure of carbon fibers, organized by a plurality of carbon fibers, includes, an aggregate of the carbon fibers aligned in a lengthwise direction, in which a density of the carbon fibers at one side end is different from a density of the carbon fibers at the other side end. | 12-16-2010 |
| 20100329966 | FINE CARBON FIBER AGGREGATE MASS FOR REDISPERSION AND PROCESS FOR PRODUCTION THEREOF - The disclosed is a redispersible agglomerate of fine carbon fibers, which is obtained by adding the fine carbon fibers and a dispersing agent which shows solid state at least at ordinary temperature (20±10° C.) into an aqueous dispersion medium, and then removing the dispersion medium from a dispersion system where the carbon fibers are isolated individually and dispersed in the dispersion medium; and in which the carbon fibers are got together and solidified in the agglomerate while each carbon fiber maintains its isolated dispersibility;
| 12-30-2010 |
| 20110002837 | ENHANCEMENT OF QUALITY AND QUANTITY OF CARBON NANOTUBES DURING GROWTH BY ADDITION OF MISCIBLE OXYGENATES - Disclosed is an experimental setup for synthesis of carbon nanotubes by floating catalyst method which comprises of a feeding and a reactor system. FIG. | 01-06-2011 |
| 20110014113 | Carbon Nanotube Seperation by Reversible Gelation - Embodiments described herein generally relate to the separation of carbon nanotubes by reversible gelation. | 01-20-2011 |
| 20110020210 | Method for making twisted carbon nanotube wire - The present invention relates to a method for making a twisted carbon nanotube wire. Two opposite ends of the at least one carbon nanotube film is clamped by two clamps. The two clamps is pulled along two reversed directions to stretch the at least one carbon nanotube film. The at least one carbon nanotube film is twisted by rotating the two clamps while the at least one carbon nanotube film is in a straightening state. | 01-27-2011 |
| 20110033364 | PRODUCTION SYSTEM AND PRODUCTION METHOD FOR CARBON FIBER THREAD - Disclosed is a production system ( | 02-10-2011 |
| 20110038784 | ALKYNE-ASSISTED NANOSTRUCTURE GROWTH - The present invention relates to the formation and processing of nanostructures including nanotubes. Some embodiments provide processes for nanostructure growth using relatively mild conditions (e.g., low temperatures). In some cases, methods of the invention may improve the efficiency (e.g., catalyst efficiency) of nanostructure formation and may reduce the production of undesired byproducts during nanostructure formation, including volatile organic compounds and/or polycylic aromatic hydrocarbons. Such methods can both reduce the costs associated with nanostructure formation, as well as reduce the harmful effects of nanostructure fabrication on environmental and public health and safety. | 02-17-2011 |
| 20110038785 | METHOD FOR MANUFACTURING CARBON NANOTUBE - To efficiently and easily manufacture carbon nanotubes oriented in one direction. A method for manufacturing carbon nanotubes is characterized by including the steps of: bringing crystalline metal oxide particles into contact with a solution containing metal ions serving as a catalyst for forming carbon nanotubes, thereby attaching the catalyst to the surfaces of the metal oxide particles; subjecting the surfaces of the metal oxide particles to which the catalyst is attached to a CVD method or a combustion method, thereby forming carbon nanotubes on the surface of each of the metal oxide particles and resulting in producing metal oxide particles each supporting carbon nanotubes grown substantially perpendicularly to the surface of the metal oxide particle and in parallel with each other; and removing metal oxide particles from the metal oxide particles supporting carbon nanotubes. | 02-17-2011 |
| 20110052477 | APPARATUS FOR MANUFACTURING CARBON NANOTUBE HEAT SINK AND METHOD FOR MAKING THE CARBON NANOTUBE HEAT SINK - The present disclosure provides an apparatus for manufacturing a carbon nanotube heat sink. The apparatus includes a board, and a plurality of first and second carbon nanotubes formed on the board. The first carbon nanotubes and the second nanotubes are grown along a substantially same direction from the board. A height difference exists between a common free end of the first carbon nanotubes and a common free end of the second carbon nanotubes. A method for manufacturing multiple carbon nanotube heat sinks is also provided. | 03-03-2011 |
| 20110052478 | METHOD FOR MAKING CARBON NANOTUBE WIRE STRUCTURE - The present disclosure provides a method for making a carbon nanotube wire structure. A plurality of carbon nanotube arrays is provided. One carbon nanotube film is formed by drawing a number of carbon nanotubes from each of the plurality of carbon nanotube arrays, whereby a plurality of carbon nanotube films is formed. The carbon nanotube films converge at one spot. The carbon nanotube wire structure is formed by treating the carbon nanotube films by at least one of a mechanical method and an organic solvent method. | 03-03-2011 |
| 20110052479 | METHOD FOR PREPARING CARBON NANOTUBES, CARBON NANOTUBE FILMS, AND ELECTRONIC DEVICES - A method for preparing carbon nanotubes for synthesizing carbon nanotubes, fabricating carbon nanotube films and electronic devices is provided. The method for preparing carbon nanotubes can repair the defects in side walls of carbon nanotubes under stable condition easily and prepare carbon nanotubes of excellent properties. The method utilizes uric acid solution or ammonia water to treat carbon nanotubes after acidifying the carbon nanotubes by refluxing with nitric acid. The treatment temperature is, for example, 25° C.˜90° C., and treatment time is at least two 2 days. Preferably, the carbon nanotubes are treated with thionyl chloride solution before being treated with uric acid solution or ammonia water. | 03-03-2011 |
| 20110104040 | SIMPLE, EFFECTIVE AND SCALABLE PROCESS FOR MAKING CARBON NANOTUBES - A simple, effective and scalable method for fabricating carbon nanotubes. The method has two simple steps: (a) producing the carbon precursors (i.e., nanotubes of conducting polymer) in water solution via a soft template method involving a fibrillar complex and (b) carbonizing the carbon precursors (i.e. the nanotubes of the conducting polymer) at a temperature between 900-2200° C. in a nitrogen atmosphere or under a vacuum condition. | 05-05-2011 |
| 20110104041 | METHODS AND SYSTEMS FOR HCN REMOVAL - Hydrogen cyanide removal during transformation of a carbon fiber precursor into carbon fiber is provided. The method may comprise heating a carbon fiber body precursor at a substantially atmospheric pressure to above about 1200° C. in a furnace in a first stage, expelling a stream of effluent gas outside the furnace, wherein the stream of effluent gas comprises a cyanide, thermally oxidizing the cyanide during the first stage, and heating the carbon fiber body precursor to a temperature of between about 1600° C. and about 2200° C. in a second stage. | 05-05-2011 |
| 20110110842 | CONTINUOUS EXTRACTION TECHNIQUE FOR THE PURIFICATION OF CARBON NANOMATERIALS - Systems and methods for the extraction of carbon nanotubes (CNTs) by continuous and/or batch processing are disclosed. Generally, a carbon nanotube material including carbon nanotubes (CNTs), carbon nanoparticles (CNPs), and carboxylated carbon (CC) is provided and agitated to produce a well-dispersed mixture. The well-dispersed mixture can be allowed to stand in a vessel having a lower end and an upper end. In some cases, the CNPs settle at the lower end. In some cases, at least some of the CNTs and CC are disposed at the upper end and can be removed in a dispersion, which can be pH adjusted and/or filtered to extract the CNTs from the CC. | 05-12-2011 |
| 20110123429 | Process for Producing Carbon Nanotubes from Renewable Raw Materials - A subject of the present invention is a process for producing carbon nanotubes, the process comprising:
| 05-26-2011 |
| 20110142743 | ISOLATION OF SINGLE-WALLED CARBON NANOTUBES FROM DOUBLE AND MULTI-WALLED CARBON NANOTUBES - A method and system are disclosed for separating single-walled carbon nanotubes from double and multi-walled carbon nanotubes by using the difference in the buoyant density of Single-Walled versus Multi-Walled carbon nanotubes. In one embodiment, the method comprises providing a vessel with first and second solutions. The first solution comprises a quantity of carbon nanotubes, including single-walled carbon nanotubes and double and multi-walled carbon nanotubes. The single walled nanotubes have a first density, the double and multi-walled nanotubes having a second density. The second solution in the vessel has a third density between said first and second densities. The vessel is centrifuged to form first and second layers in the vessel, with the second solution between said first and second layers. The single-walled carbon nanotubes are predominantly in the first layer, and the second and multi-walled carbon nanotubes are predominantly in the second layer. | 06-16-2011 |
| 20110142744 | METHOD FOR MAKING CARBON NANOTUBE STRUCTURE - The present disclosure relates to a method for making a carbon nanotube carbon nanotube structure. The method includes steps of providing a tubular carbon nanotube array; and drawing out a carbon nanotube structure from the tubular carbon nanotube array by using a drawing tool. The carbon nanotube structure is a carbon nanotube film or a carbon nanotube wire. | 06-16-2011 |
| 20110142745 | METHOD AND APPARATUS FOR FORMING CARBON NANOTUBE ARRAY - The present disclosure relates to a method for forming a carbon nanotube array. In the method a tubular substrate is provided. The tubular substrate includes an outer sidewall with a catalyst layer located on the outer sidewall. The heating member, and the tubular substrate with the catalyst layer is received in a reacting chamber. The tubular substrate is heated by the heating member. A carbon source gas is supplied into the reacting chamber to grow the carbon nanotube array on the tubular substrate. | 06-16-2011 |
| 20110158893 | PROCESS TO PRODUCE CARBON NANOTUBES FROM MICROALGAE - We disclose a process to produce carbon nanotubes from microalgae. Microalgae is been utilized for biodiesel production. The algal membrane resulted from oil extraction of microalgae is used here to produce carbon nanotubes. The process utilized for the conversion is composed of two steps, in the first step the algal membrane is converted to carbon black through a pyrolysis process in inert atmosphere, in the second step the resulted carbon black is converted to carbon nanotubes by mixing the carbon black with a fluid with known self ignition condition and subjecting the mix to said self ignition condition. | 06-30-2011 |
| 20110158894 | METHOD AND DEVICE FOR CNT LENGTH CONTROL - A method for manufacturing a carbon nanotube (CNT) of a predetermined length is disclosed. The method includes generating an electric field to align one or more CNTs and severing the one or more aligned CNTs at a predetermined location. The severing each of the aligned CNTs may include etching the predetermined location of the one or more aligned CNTs and applying a voltage across the one or more etched CNTs. | 06-30-2011 |
| 20110171109 | Mass Production of Carbon Nanostructures - Carbon nanostructures are mass produced from graphite. In particularly preferred aspects, graphene is thermo-chemically derived from graphite and used in numerous compositions. In further preferred aspects, the graphene is re-shaped to form other nanostructures, including nanofractals, optionally branched open-ended SWNT, nanoloops, and nanoonions. | 07-14-2011 |
| 20110217228 | FIBER BUNDLE WITH PIECED PART, PROCESS FOR PRODUCING SAME, AND PROCESS FOR PRODUCING CARBON FIBER - A fiber bundle which has a pieced part formed by jetting a pressurized fluid against a fiber-bundle overlap is formed either by directly superposing the ending part of a fiber bundle composed of many fibers on the beginning part of another fiber bundle composed of many fibers or by superposing the end part and the beginning part on a jointing fiber bundle composed of many fibers, whereby the many fibers of the fiber bundles are interlaced with one another to thereby piece up the fiber bundles. The pieced part comprises an opened-fiber part in which the fibers have been opened and interlaced-fiber parts respectively located on both sides thereof, each interlaced-fiber part being composed of a plurality of constituent interlaced parts located apart in the width direction for the fiber bundle. | 09-08-2011 |
| 20110268646 | PREPARATION METHOD OF CARBON NANOTUBE BY DECOMPOSING THE POLYMER WITH HYDROTALCITE AS A CATALYST - The present invention discloses a preparation method of carbon nanotube by decomposing the polymer with hydrotalcite as a catalyst, which belongs to the field of preparation technology of carbon nanotube (CNT). The technical solution of the present invention are as below: firstly, the hydrotalcite with the particle size at nanometer or sub-micron level is prepared, and then is added into the polymer. After the calcination process at high temperature and a treatment with acid, the nano-scale CNT can be obtained. The CNTs prepared by the method supplied in this invention not only have the advantages including high yield, uniform diameter, few structural defects, low impurity content, low cost and simple preparation process, which is suitable for large-scale industrial production, but also can solve the problem of recirculation of waste plastics and utilization of the resource. | 11-03-2011 |
| 20110274611 | PURIFICATION OF SINGLE WALLED CARBON NANOTUBES BY DYNAMIC ANNEALING - A method for removing impurities from carbon nanotubes is described. Impurities may be removed from the carbon nanotubes by exposing the carbon nanotubes to a temperature, and controlling the temperature such that the temperature is constantly increasing to remove at least a portion of the impurities from the carbon nanotubes. | 11-10-2011 |
| 20110280791 | Method of more simple separation and collection of carbon nanotubes - To provide a method for separating metallic CNT and semiconducting CNT by treating a CNT-containing gel or a CNT dispersion as combined with a gel, according to a physical separation means to thereby make semiconducting CNT exist in gel and metallic CNT exist in solution, in which the semiconducting CNT adsorbed by gel are collected in a more simplified manner not dissolving the gel. | 11-17-2011 |
| 20110300056 | Production Of Nano-Structures - A process for the production of nano-structures is presented, involving providing a graphite flake comprising graphene layers; intercalating the graphite flake to form a graphite intercalation compound exhibiting Stage I, II or III intercalation; and exfoliating the graphite intercalation compound by exposing it to a temperature between about 1600° C. and about 2400° C. such that a plurality of individual graphene layers are separated from the graphite intercalation compound. | 12-08-2011 |
| 20110300057 | Production Of Nano-Structures - A process for the production of nano-structures is presented, involving providing a graphite flake comprising graphene layers; intercalating the graphite flake by non-contact intercalation to form a graphite intercalation compound exhibiting Stage I, II or III intercalation; and exfoliating the graphite intercalation compound by bringing it to a temperature between about 1600° C. and about 2400° C. such that a plurality of individual graphene layers are separated from the graphite intercalation compound. | 12-08-2011 |
| 20110305625 | METHOD FOR MAKING SEMICONDUCTING CARBON NANOTUBES - A method for making semiconducting carbon nanotubes is provided. A catalyst precursor is disposed on a substrate. The catalyst precursor includes blood. Organic substances contained in the blood are removed and iron ions contained in the blood are oxidized to yield discrete ferric oxide nano-particles on the substrate. The ferric oxide nano-particles are reduced to yield isolated iron nano-particles on the substrate. Carbon nanotubes then grow on the iron nano-particles. | 12-15-2011 |
| 20120020870 | PROCESS TO PRODUCE CARBON NANOTUBES FROM MICROALGAE - We disclose a process to produce carbon nanotubes from microalgae. Microalgae is been utilized for biodiesel production. The algal membrane resulted from oil extraction of microalgae is used here to produce carbon nanotubes. The process utilized for the conversion is composed of two steps, in the first step the algal membrane is converted to carbon black through a pyrolysis process in inert atmosphere, in the second step the resulted carbon black is converted to carbon nanotubes by mixing the carbon black with a fluid with known self ignition condition and subjecting the mix to said self ignition condition. | 01-26-2012 |
| 20120039790 | Nanotube Separation Methods - A nanotube separation method includes depositing a tag on a nanotube in a nanotube mixture. The nanotube has a defect and the tag deposits at the defect where a deposition rate is greater than on another nanotube in the mixture lacking the defect. The method includes removing the tagged nanotube from the mixture by using the tag. As one option, the tag may contain a ferromagnetic material and the removing may include applying a magnetic field. As another option, the tag may contain an ionic material and the removing may include applying an electric field. As a further option, the tag may contain an atom having an atomic mass greater than the atomic mass of carbon and the removing may include applying a centrifugal force to the nanotube mixture. Any two or more of the indicated removal techniques may be combined. | 02-16-2012 |
| 20120045385 | Systems and Methods for Controlling Chirality of Nanotubes - A system is provided that can be utilized to generate nanotubes with substantially similar chirality. The system provides a resonant frequency, keyed to a desired radial breathing mode linked to the desired chirality, that causes a template of catalysts particles or nanotubes to oscillate at the provided resonant frequency, so as to stimulate growing nanotubes to oscillate at a corresponding resonant frequency. This resonant frequency can be a result of a high frequency field or the natural heat radiation generated by the system. | 02-23-2012 |
| 20120107220 | DEVICE FOR MANUFACTURING ALIGNED CARBON NANOTUBE ASSEMBLY - Provided is a production apparatus ( | 05-03-2012 |
| 20120114549 | METHOD AND KIT FOR SEPARATING METAL AND SEMICONDUCTOR CARBON NANOTUBES - A method for separating metal carbon nanotubes with a single graphene layer (m-SWNT) and semiconductor nanotubes with a single graphene layer (sc-SWNT) is provided. The method may comprise a step for grafting, notably by radical chemical grafting, a diazonium salt derivative on a mixture of m-SWNTs and sc-SWNTs so as to obtain a mixture of grafted m-SWNTs, and non-grafted sc-SWNTs, whereby the grafted m-SWNTs and the non-grafted sc-SWNTs separate because of differential chemical and/or physical properties caused by said grafting. In addition, a kit for separating m-SWNTs and sc-SWNTs is provided. | 05-10-2012 |
| 20120114550 | NOVEL COMBINATION CATALYSTS BASED ON IRON FOR THE SUBSTANTIAL SYNTHESIS OF MULTI-WALLED CARBON NANOTUBES BY CHEMICAL VAPOR DEPOSITION - Methods and systems of preparing a catalyst to be used in the synthesis of carbon nanotubes through Chemical Vapor Depositions are disclosed. The method may include a mixture comprising at least one of an iron catalyst source and a catalyst support. In another aspect, a method of synthesizing multi-walled carbon nanotubes using the catalyst is disclosed. The method may include driving a reaction in a CVD furnace and generating at least one multi-walled carbon nanotube through the reaction. The method also includes depositing the catalyst on the CVD furnace and driving a carbon source with a carrier gas to the CVD furnace. The method further includes decomposing the carbon source in the presence of the catalyst under a sufficient gas pressure for a sufficient time to grow at least one multi-walled carbon nanotube. | 05-10-2012 |
| 20120128573 | METHOD FOR FABRICATING THREE DIMENSIONAL GRAPHENE STRUCTURES USING CATALYST TEMPLATES - There is provided a method for fabricating a three dimensional graphene structure using a catalyst template, in which the three dimensional graphene structure in various forms can be obtained through a simple process by using a metal catalyst in various forms as a template and growing graphene thereon. There is also provided a method for controlling length of a three dimensional graphene structure to be from a few nanometers to a few millimeters by controlling length of the metal catalyst template. | 05-24-2012 |
| 20120177560 | PURIFICATION OF CARBON NANOTUBES USING AGAROSE COLUMN AND DENSITY GRADIENT ULTRACENTRIFUGATION - A method of processing bundles of carbon nanotubes (CNTs). Bundles of CNTs are put into a solution and unbundled using sonication and one or more surfactants that break apart and disperse at least some of the bundles into the solution such that it contains individual semiconducting CNTs, individual metallic CNTs, and remaining CNT bundles. The individual CNTs are separated from each other using agarose bead column separation using sodium dodecyl sulfate as a surfactant. Remaining CNT bundles are then separated out by performing density-gradient ultracentrifugation. | 07-12-2012 |
| 20120177561 | NANOSTRUCTURES AND METHODS FOR CHEMICALLY SYNTHESIZING NANOSTRUCTURES - The present invention generally relates to nanostructure compositions, as well as methods for the controlled synthesis of nanostructures, such as carbon nanotubes. In some embodiments, methods involving iterative growth of a nanostructure template to homogeneously produce nanostructure compositions are provided. The compositions may include nanostructures having a specific length, width, diameter, ring orientation, and/or other characteristics. Using methods described herein, nanostructures (e.g., nanotubes) having uniform properties, such as electrical conductivity, may be readily produced. The ability to provide homogeneous nanostructure compositions may be advantageous in the design and fabrication of numerous materials and electronic devices. | 07-12-2012 |
| 20120195820 | SYSTEM AND METHOD FOR PRODUCING CARBON NANOTUBES - A method of producing carbon nanotubes, comprising, in a reaction chamber: evaporating at least a partially melted electrode comprising a catalyst by an electrical arc discharge; condensing the evaporated catalyst vapors to form nanoparticles comprising the catalyst; and decomposing gaseous hydrocarbons in the presence of the nanoparticles to form carbon nanotubes on the surface of the nanoparticles. Also a system for producing carbon nanotubes, comprising: a reactor comprising two electrodes, wherein at least one of the electrodes is at least a partially melted electrode comprising a catalyst, the reactor adapted for evaporating the at least partially melted electrode by an electrical arc discharge and for condensing its vapors to form nanoparticles comprising the catalyst, wherein the electrodes are disposed in a reaction chamber for decomposing gaseous hydrocarbons in the presence of the nanoparticles to form carbon nanotubes on the surface of the nanoparticles. | 08-02-2012 |
| 20120219489 | CARBON NANOSTRUCTURES FROM PYROLYSIS OF ORGANIC MATERIALS - Methods and apparatus to generate carbon nanostructures from organic materials are described. Certain embodiments provide solid waste materials into a furnace, that pyrolyzes the solid waste materials into gaseous decomposition products, which are then converted to carbon nanostructures. Methods and apparatuses described herein provide numerous advantages over conventional methods, such as cost savings, reducion of handling risks, optimization of process conditions, and the like. | 08-30-2012 |
| 20120237435 | Mass Production of Carbon Nanostructures - Carbon nanostructures are mass produced from graphite. In particularly preferred aspects, graphene is thermo-chemically derived from graphite and used in numerous compositions. In further preferred aspects, the graphene is re-shaped to form other nanostructures, including nanofractals, optionally branched open-ended SWNT, nanoloops, and nanoonions. | 09-20-2012 |
| 20120308470 | METHOD OF PREPARING CARBON NANOTUBES AND CATALYST FOR PRODUCING CARBON NANOTUBES - A method for preparing carbon nanotubes including attaching a catalyst consisting of a compound in which a transition metal element of Group 8, 9 or 10 is coordinated to a nitrogen-containing dendrimer compound having at least one nitrogen atom, to which a metal element may be coordinated, on a surface of a substrate, and thermally decomposing a carbon compound in the vicinity of the substrate while supplying the carbon compound on the surface of the substrate to which the catalyst is attached. The catalyst for producing the carbon nanotubes is a compound in which a transition metal element of Group 8, 9 or 10 is coordinated to a nitrogen-containing dendrimer compound having at least one nitrogen atom to which a metal element may be coordinated. | 12-06-2012 |
| 20120321543 | METHOD OF PRODUCING CARBON FIBER - A method of producing carbon fibers, in which the producing method comprises allowing a supported type catalyst and a carbon atom-containing compound to come in contact with each other in a heating zone, wherein the supported type catalyst is prepared by a method comprising impregnation of a powdery carrier with colloid containing catalyst to support particles of the catalyst on the powdery carrier having a specifically developed crystal plane such as a powdery carrier being 4 or more in the ratio (I | 12-20-2012 |
| 20130022530 | Production Of Exfoliated Graphite - A process for the production of exfoliated graphite is presented, involving providing a graphite intercalation compound; and exfoliating the graphite intercalation compound by passing the graphite intercalation compound through a plasma which is at a temperature of at least about 6000° C. to bring the graphite intercalation compound to a temperature between about 1600° C. and about 3400° C. | 01-24-2013 |
| 20130039838 | SYSTEMS AND METHODS FOR PRODUCTION OF NANOSTRUCTURES USING A PLASMA GENERATOR - The present disclosure provides systems and methods for production of nanostructures using a plasma generator. In an embodiment, a system for use with a reactor for synthesis of nanostructures may include a chamber defining a pathway for directing a fluid mixture for the synthesis of nanostructures through the chamber. The system may further include one or more heating zones disposed along the chamber to provide a temperature gradient in the chamber to form catalyst particles upon which nanostructures can be generated from the components of the fluid mixture. The system may also include a plasma generator for generating a plasma flame in a conduit through which the fluid mixture may be passed to decompose a carbon source in the fluid mixture into its constituent atoms before proceeding into the reactor for formation of nanostructures. | 02-14-2013 |
| 20130202519 | SEPARATION METHOD - A method for dispersing carbon nanotubes, wherein the nanotubes are contacted with an electronic liquid wherein the ratio to metal atoms in the electronic liquid to carbon atoms in the carbon nanotubes is controlled and a solution of carbon nanotubes obtainable by such a method is described. | 08-08-2013 |
| 20130251618 | METHOD FOR MAKING SEMICONDUCTING SINGLE WALL CARBON NANOTUBES - A method for making semiconducting single walled carbon nanotubes (SWCNTs) includes providing a substrate. A single walled carbon nanotube film including a plurality of metallic SWCNTs and semiconducting SWCNTs is located on the substrate. A macromolecule material layer is located on the single walled carbon nanotube film to cover the single walled carbon nanotube film. The macromolecule material layer, the single walled carbon nanotube film and the substrate are placed in an environment filled with electromagnetic waves. The macromolecule material layer covering the plurality of the metallic SWCNTs is melted or decomposed to expose the plurality of metallic SWCNTs. The metallic SWCNTs and the macromolecule material layer covering the semiconducting SWCNTs are removed. | 09-26-2013 |
| 20130272950 | METHOD OF MANUFACTURING A GRAPHENE FIBER - Methods of easily manufacturing a large-area graphene fiber are provided. The method includes forming a supporting fiber, forming a graphene oxide-containing solution, coating the supporting fiber with the graphene oxide-containing solution to form a graphene oxide composite fiber, and separating the supporting fiber from the graphene oxide composite fiber. The large-area graphene fiber having high strength, high flexibility, and high porosity is easily manufactured to be applied in various fields including an environment field and an energy field. | 10-17-2013 |
| 20130294999 | METHOD FOR MAKING CARBON NANOTUBE STRUCTURE - The present disclosure relates to a method for making carbon nanotube structure. A substrate having a growing surface is provided. A carbon nanotube layer is placed on the growing surface of the substrate. Part of the growing surface is exposed from the carbon nanotube layer. A number of first catalysts are deposited on surface of the carbon nanotube layer and a number of second catalysts are deposited on the growing surface. A carbon nanotube array is grown on the growing surface and a carbon nanotube cluster is grown on surface of the carbon nanotube layer. | 11-07-2013 |
| 20130336874 | QUINONE RADICALS FOR ENRICHING SPECIFIC SPECIES OF CARBON NANOTUBES - The present invention is directed to a method for enriching specific species of carbon nanotubes, comprising contacting a composition of carbon nanotubes with one or more quinone compounds, reacting the carbon nanotubes with the quinone compounds, and separating the carbon nanotubes reacted with the quinone compounds from the unreacted carbon nanotubes. The present invention is also directed to a field-effect transistor comprising a semiconducting single-walled carbon nanotube enriched using a method described herein. | 12-19-2013 |
| 20140010749 | METHOD FOR PRODUCING COMPOSITE CARBON FIBERS - An object of the present invention is to provide a method for producing composite carbon fibers in which two or more carbon fibers are dispersed in a nearly homogenous state, the composite carbon fibers capable of being easily dispersed in a matrix such as a resin without leaving aggregate, and imparting low resistance. Disclosed is a method for producing composite carbon fibers, which comprises imparting a cavitation effect to slurry containing 6% by mass or less of two or more carbon fibers each having a different average fiber diameter under a pressure of 100 MPa or more and less than 245 MPa thereby to form a composite. | 01-09-2014 |
| 20140120026 | Device for Manufacturing Recycled Carbon Fibers, and Method for Manufacturing Recycled Carbon Fibers - The purpose of the present invention is to provide a manufacturing device and a manufacturing method that use carbon fiber reinforced plastic (CFRP) as a source material for the efficient, low-cost manufacture of recycled carbon fibers exhibiting excellent ease of handling. A device for manufacturing recycled carbon fibers is provided with: a dry distillation-carbonization furnace ( | 05-01-2014 |
| 20140161711 | FLAME-RESISTANT HEAT TREATMENT FURNACE - A furnace to flame-resistantly treat a precursor fiber strand by sending hot air to a heat treatment chamber through a hot air blowing nozzle in a direction parallel to a running direction of the strand is provided. The hot air passes through a porous plate and a rectifying member satisfying the following conditions: (1) AB≧4.0; (2) 0.15≦α≦0.35; (3) 0≦B−d≦20; and (4) 80% or more of the area of one opening of the porous plate when facing surfaces of the porous plate and the rectifying member overlap is included in one opening of the rectifying member, where A is the rectifying member hot air passage distance (mm), B is a horizontal maximum distance (mm) of one opening of the rectifying member, α is a rate of hole area of the porous plate, and d is the porous plate equivalent diameter (mm). | 06-12-2014 |
| 20140294715 | METHOD OF MANUFACTURING FERROUS OXIDE NANOPARTICLE, METHOD OF FORMING CARBON NANOTUBE, AND FERROUS OXIDE NANOPARTICLE - A method of manufacturing a ferrous oxide nanoparticle includes a water removing step raising temperature of a solution containing an iron oxide, an organic acid dissolving the iron oxide, and a first solvent to a first temperature and removing water in the solution, a second temperature maintaining step raising the first temperature to a second temperature and maintaining the second temperature, and a particle extracting step extracting the ferrous oxide nanoparticle from the solution after the second temperature maintaining step. | 10-02-2014 |
| 20140308194 | METHODS OF ENRICHING DIFFERENT SPECIES OF CARBON NANOTUBES - A method of enriching specific species of carbon nanotubes by exposing a composition of carbon nanotubes to an azo compound is provided. The method includes a) mixing the azo compound with a suspension comprising the composition of carbon nanotubes to form a mixture; b) incubating the mixture to react the azo compound with the carbon nanotubes; and c) separating a supernatant and a precipitate formed in the mixture. An electrode and a field-effect transistor comprising a single-walled carbon nanotube species enriched using the method are also provided. | 10-16-2014 |
| 20150071849 | SYSTEMS AND METHODS RELATED TO THE FORMATION OF CARBON-BASED NANOSTRUCTURES - Systems and methods for the formation of carbon-based nanostructures are generally described. In some embodiments, the nanostructures may be formed on a nanopositor. The nanopositor can comprise, in some embodiments, at least one of metal atoms in a non-zero oxidation state and metalloid atoms in a non-zero oxidation state. For example, the nanopositor may comprise a metal oxide, a metalloid oxide, a metal chalcogenide, a metalloid chalcogenide, and the like. The carbon-based nanostructures may be grown by exposing the nanopositor, in the presence or absence of a growth substrate, to a set of conditions selected to cause formation of carbon-based nanostructures on the nanopositor. In some embodiments, metal or metalloid atoms in a non-zero oxidation state are not reduced to a zero oxidation state during the formation of the carbon-based nanostructures. In some cases, metal or metalloid atoms in a non-zero oxidation state do not form a carbide during the formation of the carbon-based nanostructures. | 03-12-2015 |
| 20150291427 | METHOD FOR TRANSFERRING CARBON NANOTUBE ARRAY AND METHOD FOR FORMING CARBON NANOTUBE STRUCTURE - A method for transferring a carbon nanotube array includes providing a substitute substrate, a growing substrate, and a carbon nanotube array. The carbon nanotube array is grown on the growing substrate. The substitute substrate has a surface having microstructures located thereon. A carbon nanotube structure can be drawn from the carbon nanotube array. The carbon nanotube structure includes carbon nanotube segments joined end-to-end. The carbon nanotube array is transferred from the growing substrate onto the substitute substrate. During transfer, the structural integrity of the carbon nanotube array is maintained. | 10-15-2015 |
| 20150353359 | METHOD FOR PRODUCING CARBON NANOTUBES USING PROTEIN POLYMER - The present invention relates to a method for producing carbon nanotubes using a protein polymer. The present invention provides a method for producing carbon nanotubes using metal nanoparticles in which substantially nonmetallic components are removed from a protein polymer containing metal. The synthesis of carbon nanotubes using the protein polymer as a catalyst enables acquisition of metal nanoparticles having desired sizes, and also adjustment of the sizes of the metal nanoparticles and consequently fine adjustment of diameters of the carbon nanotubes. | 12-10-2015 |
| 20150368107 | METHOD FOR MAKING COMPOSITE CARBON NANOTUBE STRUCTURE - A method for making a composite carbon nanotube structure is introduced. The method includes the following steps. A carbon nanotube structure and a polymer are provided. The polymer and the carbon nanotube structure are composited together. The composite carbon nanotube structure composited with polymer and the carbon nanotube is then graphitized. | 12-24-2015 |
| 20160115301 | METHODS FOR RECOVERING CARBON FIBER FROM CARBON-FIBER-REINFORCED POLYMER (CFRP) COMPOSITES - Method for recovering carbon fibers from carbon fiber reinforced polymer composites is provided. The recovered carbon fibers can be separable and can be substantially free of thermosetting resins. Compositions comprising said recovered carbon fibers are also provided. | 04-28-2016 |
| 20160137505 | METHOD FOR SEPARATING METALLIC SINGLE-WALLED CARBON NANOTUBE FROM SEMICONDUCTIVE SINGLE-WALLED CARBON NANOTUBE - Provided is a novel method for efficiently separating a metallic SWNT and a semiconducting SWNT from single-walled carbon nanotubes (SWNTs). The present invention is a method for separating a metallic SWNT and a semiconducting SWNT from SWNTs, said method comprising: dispersing the SWNTs in a solution containing a low-molecular-weight compound having an alkyl chain moiety for exhibiting solubility in a solvent and an aromatic-ring-containing moiety for interacting with the SWNTs; and separating the dispersion into a solution fraction and a solid fraction. | 05-19-2016 |
| 20160152476 | METHOD AND SYNTHESIS REACTOR FOR PRODUCING CARBON NANOTUBES | 06-02-2016 |
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