Product Patents (Class 423/447.2)
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Publication number: 20110020211Abstract: A system is provided for forming carbon nanotubes comprising growing carbon nanotubes using a hot filament CVD system.Type: ApplicationFiled: March 9, 2009Publication date: January 27, 2011Applicant: UNIVERSITY OF TOLEDOInventor: Ahalapitiya H. Jayatissa
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Patent number: 7875257Abstract: The present invention relates to dispersions of nanostructured carbon in organic solvents containing alkyl amide compounds and/or diamide compounds. The invention also relates to methods of dispersing nanostructured carbon in organic solvents and methods of mobilizing nanostructured carbon. Also disclosed are methods of determining the purity of nanostructured carbon.Type: GrantFiled: May 7, 2009Date of Patent: January 25, 2011Assignee: Rochester Institute of TechnologyInventors: Brian J. Landi, Ryne P. Raffaelle, Herbert J. Ruf, Christopher M. Evans
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Publication number: 20110006266Abstract: The present invention relates to a catalyst for preparing a carbon nanotube having desired apparent density by controlling the adding amount of co-precipitating agent in the process of preparing a catalyst in order to obtain a catalyst having a minimized particle size. More specifically, this invention relates to a catalyst for preparing carbon nanotube having desired apparent density based upon the reverse-correlation between the amount of co-precipitating agent added in the process of preparing catalyst and the apparent density of catalyst. The carbon nanotube prepared by the catalyst having low apparent density shows excellent electrical conductivity and highly uniformed dispersion in the polymer/carbon nanotube composite.Type: ApplicationFiled: December 18, 2009Publication date: January 13, 2011Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.Inventors: Namsun CHOI, Hyun-Kyung SUNG, Dong Hwan KIM, Sang-Hyo RYU, Wan Sung LEE, Youngchan JANG
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Publication number: 20110003151Abstract: A novel fine carbon fiber is produced by vapor growth, in which a graphite-net plane consisting of carbon atoms alone forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end, where an angle ? formed by a generatrix of the body-part and a fiber axis is less than 15°, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a central axis to form an aggregate, and the aggregates are connected in head-to-tail style with a distance, thereby forming a fiber. Furthermore, a fine short carbon fibers with excellent dispersibility can be obtained by shortening the fine carbon fiber.Type: ApplicationFiled: March 5, 2009Publication date: January 6, 2011Applicant: UBE INDUSTRIES, LTD.Inventors: Masayuki Nishio, Tsunao Matsuura, Kenji Fukuda
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Patent number: 7862793Abstract: Methods by which the growth of a nanostructure may be precisely controlled by an electrical current are described here. In one embodiment, an interior nanostructure is grown to a predetermined geometry inside another nanostructure, which serves as a reaction chamber. The growth is effected by a catalytic agent loaded with feedstock for the interior nanostructure. Another embodiment allows a preexisting marginal quality nanostructure to be zone refined into a higher-quality nanostructure by driving a catalytic agent down a controlled length of the nanostructure with an electric current. In both embodiments, the speed of nanostructure formation is adjustable, and the growth may be stopped and restarted at will. The catalytic agent may be doped or undoped to produce semiconductor effects, and the bead may be removed via acid etching.Type: GrantFiled: April 7, 2006Date of Patent: January 4, 2011Assignee: The Regents of the University of CaliforniaInventors: Kenneth J. Jensen, William E. Mickelson, Alex K. Zettl
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Patent number: 7862794Abstract: A method of oxidizing the surface of carbon microfibers that includes contacting the microfibers with an oxidizing agent that includes sulfuric acid and potassium chlorate under reaction conditions sufficient to oxidize the surface. The invention also features a method of decreasing the length of carbon microfibers that includes contacting the microfibers with an oxidizing agent under reaction conditions sufficient to decrease the length.Type: GrantFiled: August 20, 2007Date of Patent: January 4, 2011Assignee: Hyperion Cataylsis International, Inc.Inventors: Robert C. Bening, Thomas J. McCarthy
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Publication number: 20100329502Abstract: A bobbin for a loudspeaker includes at least one base and at least one carbon nanotube structure. The at least one carbon nanotube structure is positioned on at least one surface of the base. A loudspeaker includes a magnetic circuit, a bobbin; a voice coil, and a diaphragm. The magnetic circuit defines a magnetic gap. The bobbin is located in the magnetic gap and includes at least one carbon nanotube structure. The voice coil is wounded on the bobbin. The diaphragm includes an inner rim fixed to the bobbin.Type: ApplicationFiled: June 28, 2010Publication date: December 30, 2010Applicants: TSINGHUA UNIVERSITY, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: LIANG LIU, JIA-PING WANG
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Patent number: 7854991Abstract: This invention provides an aligned single-layer carbon nanotube bulk structure, which comprises an assembly of a plurality of aligned single-layer carbon nanotube and has a height of not less than 10 ?m, and an aligned single-layer carbon nanotube bulk structure which comprises an assembly of a plurality of aligned single-layer carbon nanotubes and has been patterned in a predetermined form. This structure is produced by chemical vapor deposition (CVD) of carbon nanotubes in the presence of a metal catalyst in a reaction atmosphere with an oxidizing agent, preferably water, added thereto. An aligned single-layer carbon nanotube bulk structure, which has realized high purify and significantly large scaled length or height, its production process and apparatus, and its applied products are provided.Type: GrantFiled: July 27, 2005Date of Patent: December 21, 2010Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Kenji Hata, Sumio Iijima, Motoo Yumura, Don N. Futaba
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Patent number: 7854862Abstract: Facile ways towards the integration of the regioregular poly(3-alkylthiophene)s onto carbon nanotubes, providing multifunctional materials that combine the extraordinary properties of the carbon nanotubes with those of regioregular poly(3-alkylthiophene)s, are presented.Type: GrantFiled: August 13, 2008Date of Patent: December 21, 2010Assignee: Advent TechnologiesInventors: Christos Chochos, Joannis Kallitsis
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Patent number: 7854914Abstract: The present invention relates to a method of solubilizing carbon nanotubes, to carbon nanotubes produced thereby and to uses of said carbon nanotubes.Type: GrantFiled: March 13, 2009Date of Patent: December 21, 2010Assignee: Sony Deutschland GmbHInventors: William E. Ford, Jurina Wessels, Akio Yasuda
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Publication number: 20100314587Abstract: The disclosure provides compositions prepared by combining nanomaterials with a halide-containing polymer, thereby forming a combined polymer matrix having dispersed nanomaterials within the matrix. The nanomaterials may be carbon-based nanotubes, in some applications. A halide-containing monomer is combined with nanotubes, and then polymerized in some compositions. In other applications, a halide-containing polymer is solution processed with nanotubes to form useful compositions in the invention. Also disclosed are probes for near field detection of radiation.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Inventors: David Carroll, John Ballato, Stephen Foulger, Richard Czerw, Dennis Smith, Hiren Shah, Earl Wagener
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Patent number: 7850940Abstract: The present application provides a C1-xNx nanotube with pores having nano-sized diameter ranging from 5 to 10 ?, where x ranges from 0.001 to 0.2, and a method for controlling the size and quantity of pores in said nanotube by reacting hydrocarbon gas, nitrogen gas, and oxygen gas or hydrogen gas together in the presence of metal catalyst and by controlling the concentration of nitrogen gas.Type: GrantFiled: June 1, 2009Date of Patent: December 14, 2010Assignee: Korea Advance Institute of Science and TechnologyInventors: Jeung-Ku Kang, Jai-Young Lee, Hyun-Seok Kim, Seong-Ho Yang, Kyu-Sung Han, Se-Yun Kim, Jung-Woo Lee, Weon-Ho Sin
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Publication number: 20100310446Abstract: The present invention is directed to the production of nanostructures, e.g., single wall carbon nanotubes (“SWNT”) and/or multi wall carbon nanotubes (“MWNT”), from solutions containing a polymer, such as polyacrylonitrile (PAN). In particular, the invention is directed to the production of nanostructures, for example, SWNT and/or MWNT, from mixtures, e.g., solutions, containing polyacrylonitrile, polyaniline emeraldine base (PANi) or a salt thereof, an iron salt, e.g., iron chloride, and a solvent. In one embodiment, a mixture containing polyacrylonitrile, polyaniline emeraldine base or a salt thereof, an iron salt, e.g., iron chloride, and a solvent is formed and the mixture is electrospun to form nanofibers. In another embodiment, the electrospun nanofibers are then oxidized, e.g., heated in air, and subsequently pyrolyzed to form carbon nanostructures.Type: ApplicationFiled: August 17, 2010Publication date: December 9, 2010Inventor: John D. Lennhoff
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Publication number: 20100296226Abstract: Disclosed is an electric double layer capacitor having a positive polarizable electrode and a negative polarizable electrode, each of the positive and negative polarizable electrodes having a polarizable electrode layer, the positive polarizable electrode layer containing carbon fibers P and activated carbon P, the negative polarizable electrode layer containing carbon fibers N and activated carbon N, wherein at least one of the carbon fibers P and carbon fibers N has at least one peak in the range of 1 to 2 nm in a pore distribution determined by BJH analysis using a nitrogen adsorption method, and the sum total of BET specific surface areas of the activated carbon P and the carbon fibers P is larger than the sum total of BET specific surface areas of the activated carbon N and the carbon fibers N.Type: ApplicationFiled: January 15, 2009Publication date: November 25, 2010Applicant: SHOWA DENKO K.K.Inventors: Youichi Nanba, Masako Tanaka, Takashi Mori
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Publication number: 20100297449Abstract: The present invention is a transparent conductive film characterized in that: a major component of the transparent conductive film is a single-walled carbon nanotube; the single-walled carbon nanotubes are present in a bundle state; and a rope-like shape, which is a state where the bundles are gathered together, can be confirmed by scanning electron microscope observation. The present invention is also a method for producing a liquid crystal alignment film using a transparent electrode substrate, with an electrode layer being the aforementioned transparent conductive film. According to the invention, a transparent electrode substrate with high wettability can be obtained, and further a method for producing an alignment film by which a uniform alignment film can be obtained without deteriorating an electrical characteristic is provided.Type: ApplicationFiled: October 24, 2007Publication date: November 25, 2010Applicant: KURARAY CO., LTD.Inventors: Takahiro Kitano, Masayasu Ogushi
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Publication number: 20100297389Abstract: The invention is directed to a method for fabricating a mesoporous carbon material, the method comprising subjecting a precursor composition to a curing step followed by a carbonization step, the precursor composition comprising: (i) a templating component comprised of a block copolymer, (ii) a phenolic compound or material, (iii) a crosslinkable aldehyde component, and (iv) at least 0.5 M concentration of a strong acid having a pKa of or less than ?2, wherein said carbonization step comprises heating the precursor composition at a carbonizing temperature for sufficient time to convert the precursor composition to a mesoporous carbon material. The invention is also directed to a mesoporous carbon material having an improved thermal stability, preferably produced according to the above method.Type: ApplicationFiled: May 20, 2009Publication date: November 25, 2010Applicant: UT-BATTELLE, LLCInventors: Sheng Dai, Xiqing Wang
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Publication number: 20100291759Abstract: Separation of carbon nanotubes or fullerenes according to diameter through non-covalent pi-pi interaction with molecular clips is provided. Molecular clips are prepared by Diels-Alder reaction of polyacenes with a variety of dienophiles. The pi-pi complexes of carbon nanotubes with molecular clips are also used for selective placement of carbon nanotubes and fullerenes on substrates.Type: ApplicationFiled: May 10, 2010Publication date: November 18, 2010Applicant: International Business Machines CorporationInventors: Ali Afzali-Ardakani, Cherie R. Kagan, Rudolf Tromp
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Publication number: 20100282668Abstract: Disclosed herein is a nanostructured material comprising carbon nanotubes fused together to form a three-dimensional structure. Methods of making the nanostructured material are also disclosed. Such methods include a batch type process, as well as multi-step recycling methods or continuous single-step methods. A wide range of articles made from the nanostructured material, including fabrics, ballistic mitigation materials, structural supports, mechanical actuators, heat sink, thermal conductor, and membranes for fluid purification is also disclosed.Type: ApplicationFiled: February 4, 2010Publication date: November 11, 2010Inventors: Christopher H. Cooper, Alan G. Cummings
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Publication number: 20100284896Abstract: A spun fiber of carbon nanotubes is exposed to ion irradiation. The irradiation exposure increases the specific strength of the spun fiber.Type: ApplicationFiled: December 17, 2007Publication date: November 11, 2010Inventors: Paul N. Arendt, Yuntian T. Zhu, Igor O. Usov, Xiefei Zhang
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Patent number: 7829055Abstract: A method of functionalizing nano-carbon materials with a diameter less than 1 ?m, comprising: contacting the nano-carbon materials with a free radical generating compound such as azo-compound in an organic solvent under an inert gas atmosphere, thereby obtaining nano-carbon materials with functional groups thereon. The physical and chemical properties of the nano-carbon materials can be modified through the aforementioned method.Type: GrantFiled: December 27, 2006Date of Patent: November 9, 2010Assignee: Industrial Technology Research InstituteInventors: Chrong-Ching Lee, Kuo-Chen Shih, Mei Hua Wang, Sui-Wen Ho, Shu-Jiuan Huang
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Patent number: 7829056Abstract: Disclosed herein is a method of forming a guanidine group on carbon nanotubes to improve the dispersibility of carbon nanotubes, a method of attaching carbon nanotubes having guanidine groups to a substrate, and carbon nanotubes and a substrate manufactured by the above methods. The method of forming the guanidine group on the carbon nanotubes includes forming a carboxyl group on the carbon nanotubes, and forming the guanidine group on the carboxyl group of the carbon nanotubes. In addition, the method of attaching the carbon nanotubes having guanidine groups to the substrate includes coating a substrate with a polymer having crown ether attached thereto, drying the polymer layer having crown ether attached thereto formed on the substrate to be semi-dried, and coating the semi-dried polymer layer with a solution including carbon nanotubes having guanidine groups dispersed therein.Type: GrantFiled: July 6, 2007Date of Patent: November 9, 2010Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Hai Sung Lee
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Patent number: 7829054Abstract: In an actuator including at least one active electrode disposed in an electrolyte and comprising at least two webs of an electrically conductive material with a plurality of geometrically anisotropic nanoparticles disposed thereon and oriented uni-directionally in a preferential direction with an electrically conductive connection between the nanoparticles and the webs and a potential difference with respect to ground can be applied to the active electrode by a voltage or current source, the nanoparticles are connected in each case to two webs and the connections are material-interlocking.Type: GrantFiled: June 27, 2006Date of Patent: November 9, 2010Assignee: Forschungszentrum Karlsruhe GmbHInventors: Torsten Koker, Ulrich Gengenbach
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Publication number: 20100279097Abstract: A method for fabricating a semi-continuous vapor grown carbon fiber mat, comprising: (a) providing a substrate which has a catalyst on its surface; (b) placing said substrate in a furnace; (c) introducing hydrogen, ammonia, or combinations thereof into said furnace; (d) adjusting a temperature of said furnace to 400° C. to 900° C. to proceed heat treatment for 15 to 90 minutes; (e) adding a carbon-containing compound into said furnace and adjusting the ratio of said carbon-containing compound and said hydrogen, ammonia, or combinations thereof; (f) adjusting the temperature of said furnace to 600° C. to 1200° C. to crack said carbon-containing compound, and thereby forming a carbon fiber mat, wherein time for reaction is 1 to 3 hours. The present invention also provides a semi-continuous vapor grown carbon fiber mat and a graphitized carbon fiber mat.Type: ApplicationFiled: April 30, 2010Publication date: November 4, 2010Inventors: Jyh Ming TING, Dillip Kumar MISHRA, Hsiao Ping CHUNG
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Publication number: 20100278716Abstract: A dispersion contains a flame-resistant polymer, which can improve shaping stability of the flame-resistant polymer during ejection from a die orifice, and physical stability of a shaped product in a washing step. The dispersion containing a flame-resistant polymer is a dispersion in which a flame-resistant polymer is dispersed in an organic solvent, an in-water tensile strength thereof per unit cross-sectional area is 1.0 MPa or more and 6.5 MPa or less, the flame-resistant polymer can be preferably obtained by heat-treating an acrylonitrile polymer in the presence of at least one kind of acid, acid anhydride or acid chloride in an organic solvent, and a suitable organic solvent is a polar organic solvent.Type: ApplicationFiled: December 19, 2007Publication date: November 4, 2010Applicant: TORAY INDUSTRIES, INC.Inventors: Masafumi Sudo, Daisuke Kawakami, Tomihiro Ishida
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Patent number: 7824649Abstract: This apparatus and method facilitate the synthesis of a single-wall carbon nanotube array. The apparatus includes a reactor, a local heating device, a gaseous carbon supplier, and a reactant gas supplier. The reactor is configured for receiving a catalyst in a reaction zone thereof. The local heating device is configured for selectively heating the reaction zone and/or the catalyst received thereat. The gaseous carbon supplier is configured for introducing gaseous carbon into the reactor from an upstream position of the reaction zone. The reactant gas supplier is configured for introducing a reactant gas containing a carbon source gas into the reactor. A densely aligned, single-wall carbon nanotube array can be achieved due to the proximity to the catalyst of the heating device and due to the gaseous carbon supplier.Type: GrantFiled: April 28, 2006Date of Patent: November 2, 2010Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Kai-Li Jiang, Zhuo Chen, Shou-Shan Fan
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Patent number: 7820290Abstract: Water dispersible carbon fibers, (1) wherein the surface oxygen concentration (O/C) of each of the single fibers is 0.03 or more and less than 0.12 as measured by X-ray photoelectron spectroscopy and forming a first contact angle with water of 75° or less as measured by the Wilhelmy method; (2) wherein the O/C is 0.12 or more and less than 0.20 and forming a first contact angle with water of 65° or less as measured by the Wilhelmy method; or (3) wherein the O/C is 0.20 or more and 0.30 or less and forming a first contact angle with water of 55° or less as measured by the Wilhelmy method; and wherein a sizing agent containing a surfactant as a major component has adhered to the single fibers of each of the water dispersible carbon fibers.Type: GrantFiled: August 18, 2005Date of Patent: October 26, 2010Assignee: Toray Industries, Inc.Inventors: Shoji Murai, Masato Honma, Yoshiki Takebe, Yoshifumi Nakayama
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Publication number: 20100266806Abstract: One exemplary embodiment of an anti-intrusion beam for a vehicle door assembly may include a composite material. The composite material includes a fiber reinforcement with multiple fibers. The fibers may be oriented at an angle ranging between about 35 and 55 degrees when measured with respect to a lengthwise dimension of the anti-intrusion beam.Type: ApplicationFiled: April 21, 2009Publication date: October 21, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventor: John N. Owens
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Publication number: 20100260658Abstract: There is disclosed a method of producing a pre-oxidation fiber in the production of the pre-oxidation fiber by subjecting a polyacrylic precursor fiber to pre-oxidation processing in an oxidizing atmosphere, including shrinking the precursor fiber as a pretreatment of pre-oxidation at a load of 0.58 g/tex or less in the temperature range of 220 to 260° C. under conditions in which the degree of cyclization (I1620/I2240) of the precursor fiber measured by a Fourier transform infrared spectrophotometer (FT-IR) does not exceed 7%, initially-drawing the precursor fiber at a load of 2.7 to 3.5 g/tex in an oxidizing atmosphere at 230 to 260° C. in the ranges of the degree of cyclization of not exceeding 27% and of the density of not exceeding 1.2 g/cm3, and then subjecting the pre-oxidation fiber to pre-oxidation treatment.Type: ApplicationFiled: December 10, 2008Publication date: October 14, 2010Applicant: TOHO TENAX CO., LTDInventors: Taro Oyama, Rie Kawahito, Hiroshi Kimura
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Patent number: 7811542Abstract: A method for making carbon nanotube particulates involves providing a catalyst comprising catalytic metals, such as iron and molybdenum or metals from Group VIB or Group VIIIB elements, on a support material, such as magnesia, and contacting the catalyst with a gaseous carbon-containing feedstock, such as methane, at a sufficient temperature and for a sufficient contact time to make small-diameter carbon nanotubes having one or more walls and outer wall diameters of less than about 3 nm. Removal of the support material from the carbon nanotubes yields particulates of enmeshed carbon nanotubes that retain an approximate three-dimensional shape and size of the particulate support that was removed. The carbon nanotube particulates can comprise ropes of carbon nanotubes. The carbon nanotube particulates disperse well in polymers and show high conductivity in polymers at low loadings. As electrical emitters, the carbon nanotube particulates exhibit very low “turn on” emission field.Type: GrantFiled: September 14, 2006Date of Patent: October 12, 2010Assignee: Unidym, Inc.Inventors: Kenneth O. McElrath, Yuemei Yang, Kenneth A. Smith, Xiaodong Hu
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Publication number: 20100254887Abstract: The invention is directed to carbon fibers having high tensile strength and modulus of elasticity. The invention also provides a method and apparatus for making the carbon fibers. The method comprises advancing a precursor fiber through an oxidation oven wherein the fiber is subjected to controlled stretching in an oxidizing atmosphere in which tension loads are distributed amongst a plurality of passes through the oxidation oven, which permits higher cumulative stretches to be achieved. The method also includes subjecting the fiber to controlled stretching in two or more of the passes that is sufficient to cause the fiber to undergo one or more transitions in each of the two or more passes. The invention is also directed to an oxidation oven having a plurality of cooperating drive rolls in series that can be driven independently of each other so that the amount of stretch applied to the oven in each of the plurality of passes can be independently controlled.Type: ApplicationFiled: May 19, 2010Publication date: October 7, 2010Inventor: Carlos A. León y León
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Publication number: 20100254886Abstract: A method for making carbon nanotube particulates involves providing a catalyst comprising catalytic metals, such as iron and molybdenum or metals from Group VIB or Group VIIIB elements, on a support material, such as magnesia, and contacting the catalyst with a gaseous carbon-containing feedstock, such as methane, at a sufficient temperature and for a sufficient contact time to make small-diameter carbon nanotubes having one or more walls and outer wall diameters of less than about 3 nm. Removal of the support material from the carbon nanotubes yields particulates of enmeshed carbon nanotubes that retain an approximate three-dimensional shape and size of the particulate support that was removed. The carbon nanotube particulates can comprise ropes of carbon nanotubes. The carbon nanotube particulates disperse well in polymers and show high conductivity in polymers at low loadings. As electrical emitters, the carbon nanotube particulates exhibit very low “turn on” emission field.Type: ApplicationFiled: September 14, 2006Publication date: October 7, 2010Inventors: Kenneth O. McElrath, Yuemei Yang, Kenneth A. Smith, Xiaodong Hu
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Patent number: 7807127Abstract: The present invention relates to a carbon nanotube that contains nitrogen based functional groups (such as nitro, nitroso, N-oxide, oxime, hydroxylamine, diazo, azo, and azide) that are covalently attached to lattice carbons of the carbon nanotube, directly or via a chemical linker. The present invention also relates to methods for the preparation of the carbon nanotube from an amino-functionalized carbon nanotube via an amino oxidation reaction. The synthetic methods of the present invention allow the nitrogen based functional groups to be attached selectively to one of two distinct regions of the carbon nanotube, the ends or the sidewall, and thus enable the synthesis of a carbon nanotube having nitrogen based functional groups substantially concentrated on either the ends or the sidewall of the carbon nanotube.Type: GrantFiled: April 14, 2006Date of Patent: October 5, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Craig Whitaker, William M. Koppes
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Publication number: 20100247909Abstract: The present invention provides a process for manufacturing a carbon nanofiber comprising: (a) mixing a carbon nanofiber precursor and camphor in a solvent to prepare a solution; (b) electric spinning the solution to obtain a nanofiber; (c) oxidative stabilizing the nanofiber; and (d) carbonizing the oxidative stabilized nanofiber, wherein camphor is volatilized to form micropores in the oxidative stabilization and carbonization. The present invention also provides a carbon nanofiber manufactured by the same.Type: ApplicationFiled: December 29, 2006Publication date: September 30, 2010Applicant: Sungkyunkwan University Foundation for Corporate CollaborationInventors: Younghee Lee, Kayhyeok An, Eunju Ra
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Publication number: 20100247420Abstract: Carbon nanostructures such as multiwalled carbon nanotubes are formed from electrolyzed coal char. The electrolyzed coal char is formed by forming a slurry of coal particles, metal catalyst and water and subjecting this to electrolysis, which generates carbon dioxide and hydrogen. This forms a coating on the particles which includes metal catalysts. These particles can be used as is for formation of multi-walled carbon nanotubes using a pyrolysis method or other method without the addition of any catalyst. The gelatinous coating can be separated from the char and used as a fuel or as a carbon source to form carbon nanostructures.Type: ApplicationFiled: March 18, 2010Publication date: September 30, 2010Inventor: Gerardine G. Botte
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Publication number: 20100247381Abstract: Disclosed are copolymers of carbon nanotubes, as well as processes and applications of carbon nanotube dispersions. Carbon nanotube emulsions and related technology are also disclosed. The controlled deposition of carbon nanotubes on substrates is also provided. Methods of purifying single-walled carbon nanotubes are also provided. Devices made according to the disclosed methods are further described herein.Type: ApplicationFiled: June 3, 2010Publication date: September 30, 2010Applicant: THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIAInventors: Arjun G. Yodh, Mohammad F. Islam, Alan T. Johnson, JR., Danvers E. Johnston
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Publication number: 20100247419Abstract: A carbon nano tube characterized by Bragg diffraction pattern peaks appearing at 2 theta (2?)=26.5°, 44.5°, 51.8°. A carbon nano fiber is disclosed and characterized by Bragg diffraction pattern peaks appearing 2 theta (2?)=44.5°, 51.8°. These carbon nano materials can be prepared in a solid phase by combustion and heating of the solid raw materials both with and without a tube control agent. The carbon nano tube growth process can include controlling the length of the tubes.Type: ApplicationFiled: November 1, 2006Publication date: September 30, 2010Inventor: Khe C. Nguyen
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Publication number: 20100239490Abstract: Processes for producing single-wall carbon nanotubes without catalysts are provided. The nanotubes are produced by vaporizing silicon carbide and carbon.Type: ApplicationFiled: March 15, 2006Publication date: September 23, 2010Inventors: David Herbert Roach, Gillian Althea Maria Reynolds
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Patent number: 7799246Abstract: The present invention relates to a process for preparing CNTs by bringing a carbon source into contact with a multivalent metal and/or metal-oxide-based catalyst deposited on an inorganic substrate having a BET specific surface area of greater than 50 m2/g. The CNTs obtained may be used as agents for improving the mechanical and electrical conductivity properties in polymeric compositions.Type: GrantFiled: February 3, 2006Date of Patent: September 21, 2010Assignee: Arkema FranceInventors: Serge Bordere, Daniel Cochard, Eric Dutilh, Patrice Gaillard, Dominique Plee
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Patent number: 7799308Abstract: The present invention discloses ultra-fine fibrous carbon and preparation of the same. Specifically, the present ultra-fine fibrous carbon is characterized by the graphite-like structure with the sp2 hybrid carbon content of more than 95% per total content; the (002) plane interlayer spacing (d002, d-spacing of C(002) profiles determined by X-ray diffraction method) of 0.3370˜0.3700 nm; the (002) plane stacking of more than 4 layers, namely the stacking height (Lc002) of more than 1.5 nm; fibrous carbon length per fibrous carbon width or diameter (aspect ratio) of more than 20; the average diameter of 5˜50 nm.Type: GrantFiled: November 12, 2008Date of Patent: September 21, 2010Assignee: Suntel Co., Ltd.Inventor: Seong Ho Yoon
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Publication number: 20100233781Abstract: Devices, compositions, and methods are described which provide a tubular nanostructure targeted to a lipid bilayer membrane. The targeted tubular nanostructure can have a surface region configured to pass through a lipid bilayer membrane of a cell, a hydrophobic surface region flanked by two hydrophilic surface regions configured to form a pore in a lipid bilayer membrane of a cellular organelle, and at least one ligand configured to bind one or more cognates on the lipid bilayer membrane of the cellular organelle. The target cell can be, for example, a tumor cell, an infected cell, or a diseased cell in a subject. The tubular nanostructure can form a pore in the lipid bilayer membrane of the cellular organelle, e.g., mitochondria, which can permit transit or translocation of at least one compound across the membrane and cause cell death of the target cell.Type: ApplicationFiled: January 30, 2009Publication date: September 16, 2010Inventors: Mahalaxmi Gita Bangera, Ed Harlow, Roderick A. Hyde, Muriel Y. Ishikawa, Edward K.Y. Jung, Eric C. Leuthardt, Nathan P. Myhrvold, Dennis J. Rivet, Elizabeth A. Sweeney, Clarence T. Tegreene, Lowell L. Wood, JR., Victoria Y.H. Wood
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Publication number: 20100233067Abstract: A method of producing of the present invention is a method of producing a cup-shaped nanocarbon formed of graphene sheets. A nanocarbon molecule has a cup shape, a bottom surface and an upper surface thereof being opened. The method of producing of the present invention includes the following processes (A) and (B). (A) a process of preparing a cup-stacked carbon nanotube, in which cup-shaped nanocarbons having openings at the bottom surface and the upper surface are laminated; and (B) a process of separating the cup-shaped nanocarbon from the cup-stacked carbon nanotube by treating the cup-stacked carbon nanotube with a reducing agent.Type: ApplicationFiled: January 5, 2007Publication date: September 16, 2010Applicant: Osaka UniversityInventors: Shunichi Fukuzumi, Kenji Saito, Masataka Ohtani
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Patent number: 7794690Abstract: A carbon sequestration and dry reforming process for the production of synthesis gas and sequestered carbon from carbon dioxide. Two-dimension catalysts for sequestering carbon and a process to produce same. A method for activating two dimension catalysts.Type: GrantFiled: April 6, 2005Date of Patent: September 14, 2010Assignee: Socpra Sciences Et Genie s.e.c.Inventors: Nicolas Abatzoglou, François Gitzhofer, Jasmin Blanchard, Karine De Oliveira Vigier, Denis Gravelle
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Patent number: 7794683Abstract: The present invention relates to methods for the preparation of a carbon nanotube from an amino-functionalized carbon nanotube via an amino oxidation reaction. The carbon nanotube includes nitrogen based functional groups that are covalently attached to lattice carbons of the carbon nanotube, directly or via a chemical linker. The synthetic methods of the present invention allow the nitrogen based functional groups to be attached selectively to one of two distinct regions of the carbon nanotube, and thus enable the synthesis of a carbon nanotube having nitrogen based functional groups substantially concentrated on the ends and/or the sidewall of the carbon nanotube.Type: GrantFiled: April 14, 2006Date of Patent: September 14, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Craig Whitaker, William M. Koppes
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Publication number: 20100226847Abstract: The present invention is a method comprising a direct chirality-selective nucleation and synthesis of single-walled carbon nanotubes from carbon-containing gases using catalytic nanoparticles of uniform size heated by ultra-short laser pulses of selected frequency to temperatures sufficient for carbon nanotube nucleation and synthesis.Type: ApplicationFiled: March 5, 2009Publication date: September 9, 2010Applicant: CFD RESEARCH CORPORATIONInventor: Aleksey V. Vasenkov
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Publication number: 20100222432Abstract: Methods to prepare synthetic carbon nanotubes having controllable properties and synthetic carbon nanotubes having controllable properties are provided. The properties which are controllable using the methods provided here include independently and in combination: diameter, length, identity and number of functional groups present and identity and number of heteroatoms present.Type: ApplicationFiled: August 10, 2006Publication date: September 2, 2010Inventor: Duy H. Hua
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Publication number: 20100221173Abstract: Methods of preparing single walled carbon nanotubes are provided. An arrangement comprising one or more layers of fullerene in contact with one side of a metal layer and a solid carbon source in contact with the other side of metal layer is prepared. The fullerene/metal layer/solid carbon source arrangement is then heated to a temperature below where the fullerenes sublime. Single walled carbon nanotubes are grown on the fullerene side of the metal layer.Type: ApplicationFiled: March 29, 2006Publication date: September 2, 2010Applicant: Hyperion Catalysis International, Inc.Inventors: Howard Tennent, Hai-feng Zhang, Jun Ma
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Publication number: 20100221535Abstract: A method for producing a platelet type slit-incorporated vapor grown carbon fiber by bringing raw materials into contact with a catalyst in a heating zone, wherein the raw materials contain at least ethylene as a carbon source, and a platelet type slit-incorporated vapor grown carbon fiber obtained by the method are disclosed.Type: ApplicationFiled: January 18, 2007Publication date: September 2, 2010Applicant: SHOWA DENKO K.K.Inventors: Masayuki Yoshimura, Katsuyuki Tsuji, Takanori Aoki
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Publication number: 20100221531Abstract: Provided is a carbon nanotube (CNT) transparent conductive layer having a loop pattern in which a plurality of loops are at least partially connected to one another, and a fabrication method thereof. The loops in the pattern are generated by a spray-coating method and partially connected with one anther, and thus improving transparency and conductivity of the CNT transparent conductive layer. In Addition, the CNT transparent conductive layer has conductivity and sheet resistance highly suitable for a transparent electrode.Type: ApplicationFiled: October 9, 2008Publication date: September 2, 2010Inventors: Sang Keun Oh, Kyoung Hwa Song, Da Jeong Jeong, Do Hyeong Park, Dong-Myeon Lee
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Publication number: 20100213419Abstract: A carbon nanotube array includes a plurality of carbon nanotubes and at least one line mark formed on the carbon nanotubes. The carbon nanotubes have a top end and a bottom end. The at least one line mark is formed on the carbon nanotubes. The at least one line mark transversely extends across the carbon nanotubes, and is located between the top end and the bottom end. The at least one line mark is spaced from the top and bottom ends.Type: ApplicationFiled: April 29, 2010Publication date: August 26, 2010Applicants: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Kai-Li Jiang, Kai Liu, Shou-Shan Fan
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Publication number: 20100212727Abstract: A method for continuously growing carbon nanotubes may include providing a melt comprising carbon and a catalyst at a temperature between about 1,200 degrees Celsius and about 2,500 degrees Celsius, selecting a carbon nanotube seed having at least one of a semiconductor electrical property and a metallic electrical property from a plurality of carbon nanotube seeds, contacting the selected carbon nanotube seed to a surface of the melt, and moving the selected carbon nanotube seed away from the surface of the melt at a rate operable to continuously grow a carbon nanotube, and continuously growing the carbon nanotube having the selected electrical property. Method for continuously growing a graphene sheet, and apparatus for continuously growing carbon nanotubes and graphene sheets are also disclosed.Type: ApplicationFiled: February 22, 2010Publication date: August 26, 2010Inventor: Ji Ung LEE