Product Patents (Class 423/447.2)
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Publication number: 20110262341Abstract: A catalyst free process for manufacturing carbon nanotubes by inducing an arc discharge from a carbon anode and a carbon cathode in an inert gas atmosphere contained in a closed vessel. The process is carried out at atmospheric pressure in the absence of external cooling mechanism for the carbon cathode or the carbon anode.Type: ApplicationFiled: April 25, 2010Publication date: October 27, 2011Applicant: Sri Lanka Institute of Nanotechnology (Pvt) Ltd.Inventors: Lilantha Samaranayake, Nilwala Kottegoda, Asurasinghe R. Kumarasinghe, Ajith De Alwis, Sunanda Gunasekara, Sameera Nanayakkara, Veranja Karunaratne
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Patent number: 8043693Abstract: A flame-resistant polymer excels in moldability capable of providing a flame-resistant molded item of novel configuration; a relevant flame-resistant polymer solution; a process for easily producing them; a carbon molding from the flame-resistant polymer; and a process for easily producing the same. A flame-resistant polymer is modified with an amine compound. Further, a flame-resistant polymer solution has the polymer dissolved in a polar organic solvent. A flame-resistant molding whose part or entirety is constituted of the flame-resistant polymer modified with an amine compound. A carbon molding was part or entirety constituted of a carbon component resulting from carbonization of the flame-resistant polymer modified with an amine compound. From the solution containing the flame-resistant polymer, moldings of various configurations can be obtained through further work.Type: GrantFiled: December 9, 2009Date of Patent: October 25, 2011Assignee: Toray Industries, Inc.Inventors: Tetsunori Higuchi, Katsumi Yamasaki, Koichi Yamaoka, Tomihiro Ishida
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Publication number: 20110256401Abstract: A process of producing a composite having carbon nanotubes is described where the carbon nanotube formation process of producing carbon nanotubes includes controlled heating of plant fiber materials in an oxygen-limited atmosphere. The plant fiber materials may be heated either cyclically or by rapid heating to produce the carbon nanotubes.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Inventors: Barry S. Goodell, Xinfeng Xie, Yuhui Qian, Dajie Zhang, Michael L. Peterson, Jody L. Jellison
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Publication number: 20110243831Abstract: A production method of a carbon fiber precursor fiber and/or a fiber bundle which permits easy bundling of a plurality of small tows into one bundle, with a dividing capability to divide into the original small tows spontaneously at the time of firing, and is suitable for obtaining a carbon fiber that is excellent in productivity and quality. A production method of carbon fiber precursor fiber and/or a fiber bundle that has a degree of intermingle of 1 m?1 or less between small tows, consists of substantially straight fibers without imparted crimp, a tow of which straight fibers has a moisture content of less than 10% by mass when housed in a container, and has a widthwise dividing capability to maintain a form of a single aggregate of tows when housed in a container, taken out from the container and guided into a firing step, and to divide into a plurality of small tows in the firing step by the tension generated in the firing step.Type: ApplicationFiled: April 7, 2011Publication date: October 6, 2011Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Ikeda, Takahiko Kunisawa, Atsushi Kawamura
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Patent number: 8029758Abstract: There is provided a process for producing single-walled carbon nanotubes with an increased diameter, characterized in that it comprises a diameter-increasing treatment step of heating carbon nanotubes of a raw material at a degree of vacuum of 1.3×10?2 Pa or below and at a temperature ranging from 1500 to 2000° C., preferably 1700 to 2000° C.Type: GrantFiled: December 4, 2006Date of Patent: October 4, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kyoichi Tange, Shizuka Takeuchi, Jiro Mizuno
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Patent number: 8029759Abstract: 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: GrantFiled: March 18, 2010Date of Patent: October 4, 2011Assignee: Ohio UniversityInventor: Gerardine G. Botte
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Patent number: 8021463Abstract: The invention relates to a method for producing spherical activated carbon, wherein polymer globules, which comprise thermally decomposing chemical groups, are carbonized. It is characterized by that during the carbonization, a supplier of free radicals is added to the polymer globules, the supplier of free radicals forming free radicals, which are different from the free radicals that are generated by the decomposition of the chemical groups.Type: GrantFiled: August 10, 2006Date of Patent: September 20, 2011Assignee: Blucher GmbHInventors: Manfred Schönfeld, Raik Schönfeld
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Publication number: 20110223094Abstract: A method is described herein for the providing of high quality graphene layers on silicon carbide wafers in a thermal process. With two wafers facing each other in close proximity, in a first vacuum heating stage, while maintained at a vacuum of around 10?6 Torr, the wafer temperature is raised to about 1500° C., whereby silicon evaporates from the wafer leaving a carbon rich surface, the evaporated silicon trapped in the gap between the wafers, such that the higher vapor pressure of silicon above each of the wafers suppresses further silicon evaporation. As the temperature of the wafers is raised to about 1530° C. or more, the carbon atoms self assemble themselves into graphene.Type: ApplicationFiled: March 8, 2011Publication date: September 15, 2011Applicant: The Regents of the University of CaliforniaInventors: Alessandra Lanzara, Andreas K. Schmid, Xiaozhu Yu, Choonkyu Hwang, Annemarie Kohl, Chris M. Jozwiak
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Patent number: 8012584Abstract: A pressure vessel includes a vessel body and a fiber reinforced plastic layer formed on the surface of the vessel body, wherein the fiber reinforced plastic layer include fiber reinforced plastic in which reinforcing fibers are impregnated with plastic, a strand elastic modulus of the reinforcing fiber is 305 GPa or higher, and a tensile elongation of the reinforcing fiber is 1.45 to 1.70%. A carbon fiber for a pressure vessel has a strand elastic modulus of 305 GPa or higher and a tensile elongation of 1.45 to 1.70%.Type: GrantFiled: August 26, 2004Date of Patent: September 6, 2011Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Naoki Sugiura, Satoshi Nagatsuka, Hidehiro Takemoto, Makoto Matsumoto, Masayuki Sugiura
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Publication number: 20110206932Abstract: A carbon nanotube (CNT) is provided having micropores with a diameter of 1 to 10 nm in the side wall and in turn, having a large specific surface area. A production method of a surface-modified CNT (DMWCNT), comprises heating CNT having supported on the surface thereof a metal oxide or metal nitrate fine particle at a temperature of 100 to 1000° C., such as, 200 to 500° C., in an atmosphere containing oxygen. A cyclical solid phase oxidation-reduction reaction between the metal oxide and CNT occurs on the surface of the metal oxide fine particle supported on CNT, and carbon of CNT is oxidized to open a micropore. The metal oxide is preferably cobalt oxide, and the metal nitrate is preferably cobalt nitrate.Type: ApplicationFiled: October 22, 2010Publication date: August 25, 2011Applicants: SHOWA DENKO K.K., TOKYO INSTITUTE OF TECHNOLOGYInventors: Keiko Waki, Do-Hyun Kim, Masashi Takano
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Patent number: 7998584Abstract: A high-purity carbon fiber-reinforced carbon composite includes a matrix, a carbon fiber, and sulfur. The matrix includes a crystalline carbon-based powder and glassy carbon. A content of sulfur in the high-purity carbon fiber-reinforced carbon composite is 5 ppm by mass or less.Type: GrantFiled: April 28, 2009Date of Patent: August 16, 2011Assignee: Ibiden Co., Ltd.Inventors: Hideki Kato, Masahiro Yasuda
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Patent number: 7993780Abstract: This invention provides a process for producing a lithium secondary battery. The process comprises: (a) providing a positive electrode; (b) providing a negative electrode comprising a carbonaceous material capable of absorbing and desorbing lithium ions, wherein the carbonaceous material is obtained by chemically or electrochemically treating a laminar graphite material to form a graphite crystal structure having an interplanar spacing d002 of at least 0.400 nm as determined from a (002) reflection peak in powder X-ray diffraction; and (c) providing a non-aqueous electrolyte disposed between the negative electrode and the positive electrode to form the battery structure. This larger interplanar spacing (greater than 0.400 nm, preferably no less than 0.55 nm) implies a larger interstitial space between two graphene planes to accommodate a greater amount of lithium. The resulting battery exhibits an exceptionally high specific capacity, an excellent reversible capacity, and a long cycle life.Type: GrantFiled: October 5, 2007Date of Patent: August 9, 2011Assignee: Nanotek Instruments, Inc.Inventors: Bor Z. Jang, Aruna Zhamu
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Publication number: 20110184077Abstract: The present invention is a method for decomposing a polymer material by chemically decomposing a polymer material containing a first monomer and a second monomer in a mixture of the polymer material with the first monomer or a derivative of the first monomer to produce a chemical raw material. A relationship between a proportion of number of molecules of the second monomer to number of molecules of the first monomer in a reaction system for decomposing the polymer material and the molecular weight of the chemical raw material produced in the reaction system is acquired in advance (S101). Subsequently, an addition mount of the derivative of the first monomer to be added to the polymer material is determined based on the above relationship (S102). The first monomer in the addition amount determined is then mixed with the polymer material (S103).Type: ApplicationFiled: September 9, 2009Publication date: July 28, 2011Applicant: SUMITOMO BAKELITE CO., LTDInventors: Junya Goto, Masaki Ishikawa, Tamotsu Orihara, Taichi Koide
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Publication number: 20110171419Abstract: An electronic element includes a substrate, and a transparent conductive layer. The substrate includes a surface. The transparent conductive layer is formed on a surface of the substrate. The transparent conductive layer includes at least one carbon nanotube layer. Carbon nanotubes in the carbon nanotube layer are adhered together by the van der Waals attractive force therebetween.Type: ApplicationFiled: September 29, 2008Publication date: July 14, 2011Applicants: Tsinghua University, HON HAI Precision Industry CO., LTD.Inventors: Qun-Qing Li, Kai-Li Jiang, Liang Liu, Shou-Shan Fan
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Publication number: 20110171111Abstract: A method of producing carbon nanotubes includes directing a flow of a gas over a substrate to provide growth of at least one carbon nanotube in a carbon-nanotube-growth region of the substrate; applying an electric field to the carbon-nanotube-growth region of the substrate after the at least one carbon nanotube has begun to grow in the carbon-nanotube-growth region, the electric field being substantially in a first direction in the carbon-nanotube-growth region; and changing the electric field at a preselected time to be substantially in a second direction in the carbon-nanotube-growth region during growth of the at least one carbon nanotube. The second direction is different from the first direction resulting in a bend substantially at a selected position of the at least one carbon nanotube, the method of producing carbon nanotubes providing the production of the at least one carbon nanotube having at least one bend substantially at a selected position along the at least one carbon nanotube.Type: ApplicationFiled: October 19, 2009Publication date: July 14, 2011Applicant: The Johns Hopkins UniversityInventors: Nina Markovic, Christopher A. Merchant, James R. Medford
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Publication number: 20110171110Abstract: A method of synthesizing carbon nanotubes. In one embodiment, the method includes the steps of: (a) dissolving a first amount of a first transition-metal salt and a second amount of a second transition-metal salt in water to form a solution; (b) adding a third amount of tannin to the solution to form a mixture; (c) heating the mixture to a first temperature for a first duration of time to form a sample; and (d) subjecting the sample to a microwave radiation for a second duration of time effective to produce a plurality of carbon nanotubes.Type: ApplicationFiled: March 22, 2011Publication date: July 14, 2011Applicant: BOARD OF TRUSTEES OF THE UNIVERSITY OF ARKANSASInventor: Tito Viswanathan
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Patent number: 7976814Abstract: The invention presents a fullerene derivative fine wire composed of basic component unit of fullerene derivative, being made of acicular crystal of fullerene derivative, as a fine wire showing high crystallinity and semiconductor performance.Type: GrantFiled: October 6, 2004Date of Patent: July 12, 2011Assignee: National Institute For Material ScienceInventors: Kun'ichi Miyazawa, Tadatomo Suga, Tadahiko Mashino
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Publication number: 20110158895Abstract: The invention provides a high module carbon fiber and a fabrication method thereof. The high module carbon fiber includes the product fabricated by the following steps: subjecting a pre-oxidized carbon fiber to a microwave assisted graphitization process, wherein the pre-oxidized carbon fiber is heated to a graphitization temperature of 1000-3000° C. for 1-30 min. Further, the high module carbon fiber has a tensile strength of between 2.0-6.5 GPa and a module of between 200-650 GPa.Type: ApplicationFiled: May 29, 2010Publication date: June 30, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chih-Yung Wang, I-Wen Liu, Jong-Pyng Chen, Shu-Hui Cheng, Syh-Yuh Cheng
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Publication number: 20110159604Abstract: An isotope-doped nano-structure of an element is provided. The isotope-doped nano-structure includes at least one isotope-doped nano-structure segment having at least two isotopes of the element, and the at least two isotopes of the element are mixed uniformly in a certain proportion. The present disclosure also provides a method for making the isotope-doped nano-structures, and a labeling method using the isotope-doped nano-structures.Type: ApplicationFiled: June 4, 2010Publication date: June 30, 2011Applicants: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: SHOU-SHAN FAN, LIANG LIU, KAI-LI JIANG
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Patent number: 7968013Abstract: Nicotinamide and/or a compound which is chemically combined with nicotinamide may be used as a carbon nanotube (“CNT”) n-doping material. CNTs n-doped with the CNT n-doping material may have long-lasting doping stability in the air without de-doping. Further, CNT n-doping state may be easily controlled when using the CNT n-doping material. The CNT n-doping material and/or CNTs n-doped with the CNT n-doping material may be used for various applications.Type: GrantFiled: January 8, 2009Date of Patent: June 28, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jaeyoung Choi, Hyeon Jin Shin, Seonmi Yoon, Boram Kang, Young Hee Lee, Un Jeong Kim
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Patent number: 7968073Abstract: Methods of producing stable dispersions of single-walled carbon nanotube structures in solutions are achieved utilizing dispersal agents. The dispersal agents are effective in substantially solubilizing and dispersing single-walled carbon nanotube structures in aqueous solutions by coating the structures and increasing the surface interaction between the structures and water. Exemplary agents suitable for dispersing nanotube structures in aqueous solutions include synthetic and natural detergents having high surfactant properties, deoxycholates, cyclodextrins, chaotropic salts and ion pairing agents. The dispersed nanotube structures may further be deposited on a suitable surface in isolated and individualized form to facilitate easy characterization and further processing of the structures.Type: GrantFiled: November 2, 2004Date of Patent: June 28, 2011Assignee: Battelle Memorial InstituteInventors: Mark S. F. Clarke, Daniel L. Feeback
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Patent number: 7964151Abstract: Provided is an apparatus for producing carbon nanotubes, that is provided with a reaction chamber and a dispersion plate. The dispersion plate is provided with a plate and a gas guiding portion provided on an edge of the plate, and a catalyst supply hole is defined in the central portion of the plate, through which metal catalysts are supplied. The gas guiding portion guides source gas to the central portion of the plate and suspends the metal catalysts discharged from the catalyst supply hole in a specific direction. Thus, the apparatus for producing carbon nanotubes can prevent loss of metal catalysts and improve space utilization.Type: GrantFiled: September 4, 2008Date of Patent: June 21, 2011Assignee: Semes Co., Ltd.Inventor: Jong-Kwan Jeon
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Patent number: 7959889Abstract: A carbon microtube comprising a hollow, substantially tubular structure having a porous wall, wherein the microtube has a diameter of from about 10 ?m to about 150 ?m, and a density of less than 20 mg/cm3. Also described is a carbon microtube, having a diameter of at least 10 ?m and comprising a hollow, substantially tubular structure having a porous wall, wherein the porous wall comprises a plurality of voids, said voids substantially parallel to the length of the microtube, and defined by an inner surface, an outer surface, and a shared surface separating two adjacent voids.Type: GrantFiled: August 6, 2008Date of Patent: June 14, 2011Assignee: Los Alamos National Security, LLCInventors: Huisheng Peng, Yuntian Theodore Zhu, Dean E. Peterson, Quanxi Jia
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Patent number: 7955699Abstract: An composite material is disclosed, which includes carbon fibrous structures which are capable of being included in a relatively large amount in the composite material, and which are capable of improving the physical properties, such as electric, mechanical, or thermal properties. The carbon fibrous structure comprises (a) carbon fibrous structures each of which comprises a three dimensional network of carbon fibers, each of the carbon fibers having an outside diameter of 15-100 nm, wherein the carbon fibrous structure further comprises a granular part, at which the carbon fibers are bound in a state that the carbon fibers are extended outwardly therefrom, and wherein the granular part is produced in a growth process of the carbon fibers, and (b) an material other than the carbon fibrous structures, wherein the amount of carbon fibrous structures added is more than 30% and not more than 100% by weight of the total weight of the composite.Type: GrantFiled: November 17, 2006Date of Patent: June 7, 2011Assignee: Hodogaya Chemical Co., LtdInventors: Koichi Handa, Subiantoro, Takayuki Tsukada, Jiayi Shan, Tsuyoshi Okubo
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Publication number: 20110121227Abstract: Disclosed is a method of: providing a mixture of a polymer or a resin and a transition metal compound, producing a fiber from the mixture, and heating the fiber under conditions effective to form a carbon nanotube-containing carbonaceous fiber. The polymer or resin is an aromatic polymer or a precursor thereof and the mixture is a neat mixture or is combined with a solvent. Also disclosed are a carbonaceous fiber or carbonaceous nanofiber sheet having at least 15 wt. % carbon nanotubes, a fiber or nanofiber sheet having the a polymer or a resin and the transition metal compound, and a fiber or nanofiber sheet having an aromatic polymer and metal nanoparticles.Type: ApplicationFiled: February 4, 2011Publication date: May 26, 2011Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Teddy M. Keller, Matthew Laskoski
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Patent number: 7947114Abstract: A process for the production of a carbon membrane comprising: (i) reacting a mixture of cellulose and hemicellulose with an acid; (ii) casting the mixture to form a film, (iii) drying said film; and (iv) carbonizing said film.Type: GrantFiled: August 4, 2006Date of Patent: May 24, 2011Assignee: NTNU Technology Transfer ASInventors: May-Britt Hagg, Jon Arvid Lie
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Patent number: 7943110Abstract: A crosslinked carbon nanotube, in which multiple carbon nanotubes therein are crosslinked with each other at multiple cross-linking sites via a connecting group containing a ?-electron conjugation system, and the bond between the connecting group and the carbon nanotube is not an ester or amido bond.Type: GrantFiled: September 26, 2008Date of Patent: May 17, 2011Assignee: FUJIFILM CorporationInventors: Yoshio Inagaki, Kenta Yoshida, Hirotaka Kitagawa
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NEAT CARBON NANOTUBE ARTICLES PROCESSED FROM SUPER ACID SOLUTIONS AND METHODS FOR PRODUCTION THEREOF
Publication number: 20110110843Abstract: Articles comprising neat, aligned carbon nanotubes and methods for production thereof are disclosed. The articles and methods comprise extrusion of a super acid solution of carbon nanotubes followed by removal of the super acid solvent. The articles may be processed by wet-jet wet spinning, dry-jet wet spinning, and coagulant co-flow extrusion techniques.Type: ApplicationFiled: October 29, 2008Publication date: May 12, 2011Applicant: WILLIAM MARCH RICE UNIVERSITYInventors: Matteo Pasquali, Wen-Fang Hwang, Howard K. Schmidt, Natneal Behabtu, Virginia Davis, A. Nicholas G. Parra-Vasquez, Micah J. Green, Richard Booker, Colin c. Young, Hua Fan -
Patent number: 7931884Abstract: Methods and processes for preparing interconnected carbon single-walled nanotubes (SWNTs) are disclosed. The SWNTs soot, synthesized by any one of the art methods, is heated to less than about 1250° C. in flowing dry air using the electrical field (E) component of microwave energy. The tubes of the SWNTs thus treated become welded and interconnected.Type: GrantFiled: October 30, 2009Date of Patent: April 26, 2011Assignee: Honda Motor Co., Ltd.Inventor: Avetik Harutyunyan
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Patent number: 7927567Abstract: An adsorbent including a porous member having holes and a nanostructure formed on at least a portion of a surface of the porous member, and an air cleaning device including the adsorbent. A porous filter including a porous member having holes and a nanostructure formed on at least a portion of a surface of the porous member, and an air cleaning device including the porous filter. A method of cleaning air for decomposing a hazardous substance using the porous filter and a decomposition gas including a superheated water vapor. A method of manufacturing a porous filter including the steps of growing a nanostructure on at least a portion of a surface of a porous member having holes, allowing a catalyst particle to be contained in a dispersion gas including a superheated water vapor, and spraying the dispersion gas on a surface of the nanostructure to attach the catalyst particle thereto.Type: GrantFiled: October 26, 2005Date of Patent: April 19, 2011Assignee: Sharp Kabushiki KaishaInventors: Mikihiro Yamanaka, Jun Kudo, Keita Hara
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Patent number: 7922796Abstract: A carbon nanotube filter. The filter including a filter housing; and chemically active carbon nanotubes within the filter housing, the chemically active carbon nanotubes comprising a chemically active layer formed on carbon nanotubes or comprising chemically reactive groups on sidewalls of the carbon nanotubes; and media containing the chemically active carbon nanotubes.Type: GrantFiled: January 6, 2010Date of Patent: April 12, 2011Assignee: International Business Machines CorporationInventors: Steven J. Holmes, Mark C. Hakey, David V. Horak, James G. Ryan
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Patent number: 7919427Abstract: A catalyst carrier, being characterized in that a catalyst metal for promoting an oxidation-reduction reaction is carried on a vapor-grown carbon fiber having an average outer diameter of from 2 nm to 500 nm, which has been subjected to a crushing treatment so as to have a BET specific surface area of from 4 m2/g to 100 m2/g and an aspect ratio of from 1 to 200, and exhibiting high activity per unit amount of a catalyst metal, a low reaction resistance and an improved output density, and is useful for a fuel cell; a production method thereof and a fuel cell using the catalyst carrier.Type: GrantFiled: April 28, 2010Date of Patent: April 5, 2011Assignee: Showa Denko K.K.Inventors: Ken-ichiro Ota, Akimitsu Ishihara, Satoshi Iinou, Akinori Sudoh
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Publication number: 20110073010Abstract: Processes are provided for removing metal-based catalyst residues from carbon nanotubes by contacting the carbon nanotubes with an active metal agent and carbon monoxide.Type: ApplicationFiled: December 2, 2010Publication date: March 31, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: Steven Dale Ittel
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Publication number: 20110064645Abstract: The present invention provides a method for producing carbon nanotubes comprising (a) providing a substrate; (b) coating a catalyst layer on said substrate; (e) heating the substrate from step (b); (d) continuously supplying a carbon source to grow carbon nanotubes; (e) interrupting the supplement of the carbon source and supplying an oxidizing gas; and (f) resupplying the carbon source to make the carbon nanotubes obtained from step (d) to re-grow at a higher growth rate. The present invention also provides carbon nanotubes fabricated by the above-mentioned method. The carbon nanotubes have extremely excellent field emission properties.Type: ApplicationFiled: December 11, 2009Publication date: March 17, 2011Applicant: National Cheng Kung UniversityInventors: Jyh-Ming TING, Wen-Chen Lin
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Patent number: 7906096Abstract: The present invention provides a chiral inorganic-organic composite porous material in which cationic chiral organic molecules are present as charge-balancing cations in a porous material containing charge-balancing cations, as well as a method for preparing the same by an ion exchange process. The chiral inorganic-organic composite porous material according to the present invention is excellent in stability, selectivity and durability, and thus, will be useful as a chiral-selective catalyst or a material of separating an isomeric mixture.Type: GrantFiled: January 7, 2005Date of Patent: March 15, 2011Assignee: ChiroliteInventors: Dong Han Bae, Chang Ick Lee, Seung Kwon Yang, Kyoung Tai No, Suk Kyu Chang, Byung Hee Seo, Jung Sup Kim, Jong Won Kim, Mee Kyung Song
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Publication number: 20110058308Abstract: This invention provides a metal encapsulated dendritic carbon nanostructure comprising a dendritic carbon nanostructure comprising a branched carbon-containing rod-shaped or annular material and a metallic body capsulated in the carbon nanostructure. There is also provided a dendritic carbon nanostructure comprising a branched carbon-containing rod-shaped or annular material.Type: ApplicationFiled: December 9, 2008Publication date: March 10, 2011Inventors: Nobuyuki Nishi, Shigenori Numao, Kent Judai, Junichi Nishijo, Kazuhiko Mizuuchi
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Publication number: 20110038787Abstract: A system includes a carbon nanotube and a torsion device. The torsion device is coupled to the carbon nanotube. The torsion device is configured to apply torsion to the carbon nanotube.Type: ApplicationFiled: July 6, 2010Publication date: February 17, 2011Applicant: Technology Transfer Office, University of ManitobaInventor: Quan Wang
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Publication number: 20110039075Abstract: A carbon nanotube film includes a plurality of carbon nanotubes. The plurality of carbon nanotubes is arranged approximately along a same first direction. The plurality of carbon nanotubes are joined end to end by van der Waals attractive force therebetween. The carbon nanotube film has a uniform width. The carbon nanotube film has substantially the same density of the carbon nanotubes along a second direction perpendicular to the first direction. The change in density across the width is within 10 percent. The present application also relates to a carbon nanotube film precursor and a method for making the carbon nanotube film.Type: ApplicationFiled: December 30, 2009Publication date: February 17, 2011Applicants: TSINGHUA UNIVERSITY, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: CHEN FENG, KAI-LI JIANG, ZHUO CHEN, YONG-CHAO ZHAI, SHOU-SHAN FAN
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Publication number: 20110038788Abstract: A carbon fiber precursor fiber having a weight average molecular weight Mw(F) of 200,000 to 700,000 and a degree of polydispersity MZ(F)/Mw(F), wherein MZ(F) indicates Z-average molecular weight of the fiber, of 2 to 5.Type: ApplicationFiled: April 10, 2009Publication date: February 17, 2011Applicant: TORAY INDUSTRIES, INC.Inventors: Fumihiko Tanaka, Makoto Endo, Daisuke Kawakami
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Publication number: 20110038786Abstract: The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media.Type: ApplicationFiled: January 5, 2010Publication date: February 17, 2011Applicant: Northwestern UniversityInventors: Mark C. Hersam, Samuel I. Stupp, Michael S. Arnold
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Patent number: 7887772Abstract: The present invention discloses an ultrafine graphitic carbon fiber and a preparation method thereof. An ultrafine fiber having a diameter of 1 to 3000 nm is prepared by electrospinning a halogenated polymer solution containing a metal compound inducing graphitization. In carbonization, an ultrafine porous graphitic carbon fiber having a large specific surface area, micropores and macropores is prepared by the graphitization by a metal catalyst generated from the metal compound. The ultrafine carbon fiber can be used as a carbon material for storing hydrogen, an adsorbing material of biochemically noxious substances, an electrode material of a supercapacitor, a secondary cell and a fuel cell, and a catalyst carrier material.Type: GrantFiled: December 1, 2006Date of Patent: February 15, 2011Assignee: Korea Institute of Science and TechnologyInventors: Seong-Mu Jo, Dong-Young Kim, Byung-Doo Chin, Sung-Eun Hong
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Patent number: 7887774Abstract: The present invention is directed toward methods of selectively functionalizing carbon nanotubes of a specific type or range of types, based on their electronic properties, using diazonium chemistry. The present invention is also directed toward methods of separating carbon nanotubes into populations of specific types or range(s) of types via selective functionalization and electrophoresis, and also to the novel compositions generated by such separations.Type: GrantFiled: July 1, 2009Date of Patent: February 15, 2011Assignee: William Marsh Rice UniversityInventors: Michael S. Strano, Monica Usrey, Paul Barone, Christopher A. Dyke, James M. Tour, W. Carter Kittrell, Robert H Hauge, Richard E. Smalley, Irene Marie Marek, legal representative
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Publication number: 20110033365Abstract: This invention provides a process and apparatus for producing a carbonaceous film such as a DLC film using a solid raw material without the need to supply a high energy radiation such as a laser beam. The process comprises providing a solid organic material as a raw material, applying a discharge energy to the material to form plasma, and depositing the plasma onto a base material to form a carbonaceous film. This process is preferably carried out by using a film production apparatus (1) comprising discharge means (10). The discharge means (10) comprises a pair of electrodes (a raw material holder) (12, 14) for holding a raw material (50) and voltage applying means (20) for applying voltage across the electrodes.Type: ApplicationFiled: December 7, 2007Publication date: February 10, 2011Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, THE UNIVERSITY OF TOKYOInventors: Hiroyuki Kousaka, Hiroyuki Koizumi, Eri Hamajima, Noritsugu Umehara, Yoshihiro Arakawa
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Publication number: 20110033366Abstract: A method includes isolating carbon atoms as carbide anions below a surface of a reactant liquid. The carbide anions are then enabled to escape from the reactant liquid to a collection area where carbon nanostructures may form. A carbon structure produced in this fashion includes at least one layer made up of hexagonally arranged carbon atoms. Each carbon atom has three covalent bonds to adjoining carbon atoms and one unbound pi electron.Type: ApplicationFiled: October 18, 2010Publication date: February 10, 2011Inventor: Anthony S. Wagner
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Patent number: 7884300Abstract: A method of realizing selective separation of metallic single-walled carbon nanotubes and semiconducting carbon nanotubes from bundled carbon nanotubes; and obtaining of metallic single-walled carbon nanotubes separated at high purity through the above method. Metallic single-walled carbon nanotubes are dispersed one by one from bundled carbon nanotubes not only by the use of a difference in interaction with amine between metallic single-walled carbon nanotubes and semiconducting carbon nanotubes due to a difference in electrical properties between metallic single-walled carbon nanotubes and semiconducting carbon nanotubes but also by the use of the fact that an amine is an important factor in SWNTs separation. The thus dispersed carbon nanotubes are subjected to centrifugation, thereby attaining separation from non-dispersed semiconducting carbon nanotubes.Type: GrantFiled: July 29, 2005Date of Patent: February 8, 2011Assignee: University of TsukubaInventors: Takeshi Akasaka, Takatsugu Wakahara, Yutaka Maeda
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Publication number: 20110027163Abstract: A method for preparing hollow nanofibers having carbon as a primary component by contacting a carbon-containing compound with a catalyst at 500 to 1200° C., wherein the catalyst is one of a zeolite exhibiting thermal resistance at 900° C. and, supported thereon, a metal; a metallosilicate zeolite containing a heteroatom except aluminum and silicon and a metal; a supporting material and fine cobalt particles exhibiting a binding energy of a cobalt 2P3/2 electron of 779.3 to 781.0 eV; a supporting material and fine cobalt particles exhibiting a cobalt atom ratio in the surface of the supporting material of 0.1 to 1.5%, as measured by the X-ray photoelectron spectroscopy at 10 kV and 18 mA; a supporting material and fine cobalt particles exhibiting a weight ratio of cobalt to a second metal component of 2.5 or more; and a zeolite having a film form and a metal.Type: ApplicationFiled: April 28, 2010Publication date: February 3, 2011Inventors: Hisanori Shinohara, Masahito Yoshikawa, Yuji Ozeki, Atsushi Okamoto, Motohiro Kuroki
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Publication number: 20110024697Abstract: The present invention in one aspect relates to a method for producing carbon nanotubes. In one embodiment, the method includes the steps of forming a substrate, depositing a loading amount of catalyst including iron and cobalt nanoparticles on the surfaces of the substrate, and heating the catalyst deposited on the substrate in a radio frequency reactor having a flow of a methane carbon source at a predetermined temperature so as to cause the growth of carbon nanotubes on the substrate.Type: ApplicationFiled: April 1, 2010Publication date: February 3, 2011Applicant: BOARD OF TRUSTEES OF THE UNIVERSITY OF ARKANSASInventors: Alexandru S. Biris, Yang Xu, Dervishi Enkeleda, Li Zhongrui
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Patent number: 7879306Abstract: 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: October 31, 2005Date of Patent: February 1, 2011Assignee: Rochester Institute of TechnologyInventors: Brian J. Landi, Ryne P. Raffaelle, Herbert J. Ruf, Christopher M. Evans
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Patent number: 7879307Abstract: 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 nanotrubes with molecular clips are also used for selective placement of carbon nanotubes and fullerenes on substrates.Type: GrantFiled: May 28, 2010Date of Patent: February 1, 2011Assignee: International Business Machines CorporationInventors: Ali Afzali-Ardakani, Cherie R. Kagan, Rudolf Tromp
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Patent number: 7879300Abstract: Method for preparing carbon nanotubes or nitrogen-doped carbon nanotubes by pyrolysis, in a reaction chamber, of a liquid containing at least one liquid hydrocarbon precursor of carbon or at least one liquid compound precursor of carbon and nitrogen consisting of carbon atoms, nitrogen atoms and optionally hydrogen atoms and/or atoms of other chemical elements such as oxygen, and optionally at least one metal compound precursor of a catalyst metal, in which said liquid is formed under pressure into finely divided liquid particles such as droplets by a specific injection system, preferably a periodic injection system, and the finely divided particles, such as droplets, formed in this way are conveyed by a carrier gas stream and introduced into the reaction chamber, where the deposition and growth of the carbon nanotubes or nitrogen-doped carbon nanotubes take place.Type: GrantFiled: June 24, 2003Date of Patent: February 1, 2011Assignee: Commissariat a l'Energie AtomiqueInventors: Martine Mayne, Dominique Porterat, Frédéric Schuster