Fullerene (e.g., C60, C70, Etc.) Patents (Class 423/445B)
  • Patent number: 6162411
    Abstract: A method for the production of fullerenic nanostructures is described in which unsaturated hydrocarbon fuel and oxygen are combusted in a burner chamber at a sub-atmospheric pressure, thereby establishing a flame. The condensibles of the flame are collected at a post-flame location. The condensibles contain fullerenic nanostructures, such as single and nested nanotubes, single and nested nanoparticles and giant fullerenes. The method of producing fullerenic soot from flames is also described.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: December 19, 2000
    Assignee: Massachusetts Institute of Technology
    Inventors: Jack B. Howard, John B. Vander Sande, K. Das Chowdhury
  • Patent number: 6149775
    Abstract: There is provided a method for preparing a single layer carbon nano-tube stably and in high preparation efficiency. Helium is introduced from a gas inlet 19 while exhausting inside a vacuum chamber 11 by means of a rotary pump 12 to prepare an atmosphere of rare gas. DC arc discharge is established between a metal-added carbon electrode to which a single metal is added 13 and a metal-added carbon electrode to which a single metal the kind of which is different from that of the former metal is added 14 by the use of a discharge power source apparatus 17. Carbon and metals are evaporated from both electrodes, and the metals are alloyed to act as a catalyst to the carbon and the single layer carbon nano-tube is prepared.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: November 21, 2000
    Assignee: Futaba Denshi Kogyo Kabushiki Kaisha
    Inventors: Toshiyuki Tsuboi, Haruhiro Kobayashi, Kenji Nawamaki
  • Patent number: 6146791
    Abstract: A rechargeable electrochemical cell comprising a body of aprotic, non-aqueous electrolyte, first and second electrodes in effective electrochemical contact with the electrolyte, the first electrode comprising positive active cathode materials such as a lithiated intercalation compound serving as the cathode and the second electrode comprising a modified carbon material formed of a graphite or carbon based materials, for example, having a hydrogenated fullerene material, such as hydrogenated C.sub.60 or C.sub.70, adsorbed thereon and serving as the anode; whereby they provide a lithium-ion cell having improved reversible energy storage characteristics and irreversible energy loss characteristics as compared with similar lithium-ion cells having carbon anodes that are not so-modified with hydrogenated fullerene material.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: November 14, 2000
    Assignee: Materials and Electrochemical Research (MER) Corporation
    Inventors: Raouf O. Loutfy, Muhammed Y. Saleh
  • Patent number: 6099696
    Abstract: A process for converting carbon or carbonated compounds in a plasma into carbons having a defined nanostructure consists of a reaction chamber whose head part contains three electrodes, a plasma gas supply, and a carbon or carbonated compound supply. A process for preparing carbons having a defined nanostructure. Apparatus to carry out the processes.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: August 8, 2000
    Assignees: Armines, Timcal Ltd.
    Inventors: Yvan Schwob, Francis Fischer, Laurent Fulcheri, Pierre Willemez
  • Patent number: 6090363
    Abstract: Method of making carbon nanotubes open on at least one end wherein capped nanotubes are treated with an oxidizing acid such as nitric acid. The treatment is effective to open at least 50% of the nanotubes on at least one end.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: July 18, 2000
    Assignee: ISIS Innovation Limited
    Inventors: Malcolm L. H. Green, Shik C. Tsang
  • Patent number: 6083469
    Abstract: Solid fullerite, comprising a mixture of C.sub.60 and C.sub.70 fullerenes and higher molecular weight carbon nanotropes, is produced by high temperature, short residence time, pyrolysis of a mixture of hydrocarbons, containing at least two "but less than six" carbon atoms in their molecular structures, admixed with an inert gas comprising at least one member of the Group VIII-A elements of The Periodic Table of The Elements in a substantially reduced-metals free reactor comprised of a thermally stable ceramic or pyrolytic graphite.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: July 4, 2000
    Inventor: Harry Paul Leftin
  • Patent number: 6077401
    Abstract: A method of producing soot containing high amounts of fullerenes comprising: providing a primary concentrator capable of impingement of a concentrated beam of sunlight onto a carbon source to cause vaporization of carbon and subsequent formation of fullerenes, or providing a solar furnace having a primary concentrator with a focal point that concentrates a solar beam of sunlight; providing a reflective secondary concentrator having an entrance aperture and an exit aperture at the focal point of the solar furnace; providing a carbon source at the exit aperture of the secondary concentrator; supplying an inert gas over the carbon source to keep the secondary concentrator free from vaporized carbon; and impinging a concentrated beam of sunlight from the secondary concentrator on the carbon source to vaporize the carbon source into a soot containing high amounts of fullerenes.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: June 20, 2000
    Assignee: Midwest Research Institute
    Inventors: Clark L. Fields, John Roland Pitts, David E. King, Mary Jane Hale, Carl E. Bingham, Allan A. Lewandowski
  • Patent number: 6002035
    Abstract: The present invention relates to a novel fullerene-containing metallocene. Such a fullerene-containing metallocene can be used as the catalyst for preparing olefin polymers.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: December 14, 1999
    Assignee: Chinese Petroleum Corporation
    Inventors: Long Y. Chiang, Taizoon A. Canteenwala
  • Patent number: 5993697
    Abstract: Novel metallic forms of planar carbon are described, as well as methods of designing and making them. Nonhexagonal arrangements of carbon are introduced into a graphite carbon network essentially without destroying the planar structure. Specifically a form of carbon comprising primarily pentagons and heptagons, and having a large density of states at the Fermi level is described. Other arrangements of pentagons and heptagons that include some hexagons, and structures incorporating squares and octagons are additionally disclosed. Reducing the bond angle symmetry associated with a hexagonal arrangement of carbons increases the likelihood that the carbon material will have a metallic electron structure.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: November 30, 1999
    Assignee: The Regents of the University of California
    Inventors: Marvin Lou Cohen, Vincent Henry Crespi, Steven Gwon Sheng Louie, Alexander Karlwalter Zettl
  • Patent number: 5989511
    Abstract: An article and method of manufacture of a nanocrystalline diamond film. The nanocrystalline film is prepared by forming a carbonaceous vapor, providing an inert gas containing gas stream and combining the gas stream with the carbonaceous containing vapor. A plasma of the combined vapor and gas stream is formed in a chamber and fragmented carbon species are deposited onto a substrate to form the nanocrystalline diamond film having a root mean square flatness of about 50 nm deviation from flatness in the as deposited state.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: November 23, 1999
    Assignee: The University of Chicago
    Inventors: Dieter M. Gruen, Alan R. Krauss, Ali Erdemir, Cuma Bindal, Christopher D. Zuiker
  • Patent number: 5985232
    Abstract: A method for the production of fullerenic nanostructures is described in which unsaturated hydrocarbon fuel and oxygen are combusted in a burner chamber at a sub-atmospheric pressure, thereby establishing a flame. The condensibles of the flame are collected at a post-flame location. The condensibles contain fullerenic nanostructures, such as single and nested nanotubes, single and nested nanoparticles and giant fullerenes. The method of producing fullerenic soot from flames is also described.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: November 16, 1999
    Assignee: Massachusetts Institute of Technology
    Inventors: Jack B. Howard, John B. Vander Sande, K. Das Chowdhury
  • Patent number: 5951916
    Abstract: A solution comprising a polar solvent and C.sub.60 in which the solubility of C.sub.60 is at least 2 mg/ml of solvent. The polar solvent has a low toxicity, high boiling point, high thermal and electrochemical stability, low viscosity, low freezing point, a high dielectric constant, and is relatively inexpensive. Preferably the polar solvent is N-ethyl-2-pyrrolidone.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: September 14, 1999
    Assignee: Kemet Electronics Corporation
    Inventors: Brian J. Melody, John T. Kinard
  • Patent number: 5951832
    Abstract: After an ultrafine particle is disposed on a giant fullerene by driving the ultrafine particle using an electron beam, the ultrafine particle is enclosed in a core hollow portion of the giant fullerene, by contracting the giant fullerene with the electron beam irradiation. Or a metal ultrafine particle composed of an active metal is enclosed in the core hollow portion of the giant fullerene, by irradiating a high energy beam such as the electron beam to an amorphous carbon including the active metal to form the giant fullerene in an irradiated portion, and by contracting the giant fullerene with the irradiation of the high energy beam.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shun-ichiro Tanaka, Bing She Xu
  • Patent number: 5919429
    Abstract: After an ultrafine particle is disposed on a giant fullerene by driving the ultrafine particle 1 using an electron beam, the ultrafine particle is enclosed in a core hollow portion of the giant fullerene, by contracting the giant fullerene with the electron beam irradiation. Or a metal ultrafine particle composed of an active metal is enclosed in the core hollow portion of the giant fullerene, by irradiating a high energy beam such as the electron beam to an amorphous carbon under existing of the active metal to form the giant fullerene in an irradiated portion, and by contracting the giant fullerene with the irradiation of the high energy beam such as the electron beam.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: July 6, 1999
    Assignees: Research Development Corporation of Japan, Shun-ichiro Tanaka
    Inventors: Shun-ichiro Tanaka, Bing She Xu
  • Patent number: 5916642
    Abstract: A method of encapsulating a material in a carbon nanotube comprising generating a vapor of the material to be encapsulated, generating a hydrogen arc discharge that discharges encapsulating products, and contacting the vapor of the material and the products discharged from the hydrogen arc discharge proximate a surface to encapsulate the material in a carbon nanotube. A carbon nanotube encapsulating a metallic material (e.g. copper), a semi-conductor material (e.g. germanium) and other materials can be produced.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: June 29, 1999
    Assignee: Northwestern University
    Inventor: Robert P. H. Chang
  • Patent number: 5904852
    Abstract: A process for separating C.sub.60, C.sub.70, and higher fullerenes above C.sub.70 is provided. The process employs a chromatographic column utilizing a functionalized aromatic-containing resin as the stationary phase, an organic solvent as the mobile phase, and a mixture of fullerenes dissolved in the mobile phase.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: May 18, 1999
    Assignee: University of South Carolina
    Inventors: James M. Tour, Walter A. Scrivens, Adam M. Rawlett
  • Patent number: 5876684
    Abstract: Fullerenes are synthesized by subjecting carbon in the form of particulates or as the carbon of a liquid or gaseous hydrocarbon, that can be continuously fed to a variety of intense, heat-generating processes that vaporize the carbon from the fluid comprising the particulates or hydrocarbons into an environment that condenses the vaporized carbon to the new form of carbon fullerenes.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: March 2, 1999
    Assignee: Materials and Electrochemical Research (MER) Corporation
    Inventors: James C. Withers, Raouf O. Loutfy
  • Patent number: 5869626
    Abstract: A novel metal-encapsulated fullerene compound wherein a side chain is introduced in a metal-encapsulated fullerene is provided.A metal-encapsulated fullerene compound represented by the following structural formula (1) is synthesized by causing a disilirane derivative or digermirane derivative having the following structural formula (2) to react with a metal-encapsulation fullerene so as to add functional groups to the fullerene. ##STR1## Herein, M is an encapsulated metal atom, m is an integer from 1 to 3, n is an even number from 28 to 200, and R is a t-butyl group or an aromatic group having alkyl groups in the 2,6-positions, such as mesityl, 2,6-diethylphenyl or 2,6-dimethylphenyl groups.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: February 9, 1999
    Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
    Inventors: Kazunori Yamamoto, Hideyuki Funasaka, Takeshi Takahashi, Takeshi Akasaka, Tatsuhisa Kato, Shigeru Nagase, Kaoru Kobayashi
  • Patent number: 5851503
    Abstract: Fullerene compounds such as C60 are dissolved into solvents such as toluene in concentration of 1.times.10-3 mol/L or more. When the solution is coagulated, fullerene associated bodies are formed. After the re-dissolution of the solution, the associated bodies are excited by laser beam, and the resultant is cluster compounds of fullerene having specific number of monomers, such as 23 and 53. The cluster is stable and separable from the solution.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: December 22, 1998
    Assignees: Ishikawa Seisakusho, Tadaoki Mitani
    Inventors: Tadaoki Mitani, Keisuke Suzuki, Johnson Ahn, Yoshihiro Iwasa
  • Patent number: 5830326
    Abstract: A graphite filament which has carbon as a basic structural unit and which have a tubular shape being formed with a helical structure with the carbon hexagons as a main structure and with an outer diameter of 30 nm or less. The tubular lattices a.sub.1 to a.sub.3 are a multiple structure and the interval between inner and outer adjacent tubules is about 0.34 nm, which is similar to the interval between basal planes of graphitic structure. The graphite filament is a new carbon filament material having a structure that is different from a normal graphite filament.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: November 3, 1998
    Assignee: NEC Corporation
    Inventor: Sumio Iijima
  • Patent number: 5811460
    Abstract: A water soluble derivative of buckministerfullerene (C.sub.60) having antiviral and virucidal properties is used to inhibit human retroviral replication and infections. The derivatized fullerene is symmetrically substituted with polar organic moieties containing 1 to 20 carbon atoms and optionally further containing oxygen or nitrogen.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: September 22, 1998
    Assignee: The Regents of the University of California
    Inventors: Simon H. Friedman, Raymond F. Schinazi, Fred Wudl, Craig L. Hill, Diane L. De Camp, Rintje P. Sijbesma, George L. Kenyon
  • Patent number: 5780101
    Abstract: A method for the production of carbon encapsulated nanoparticles, carbon nanotubes and other closed carbon structures, including contacting a catalyst of a transition metal, or a compound or alloy thereof, with a gas mixture containing carbon monoxide, and an amount of available molecular hydrogen which is insufficient to cause formation of graphite plane edges through capping, at a temperature in the range from 300.degree.-1000.degree. C., to provide closed carbon structures, which are useful in the preparation of thermal composites, reinforcement composites and magnetic particle recording media.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: July 14, 1998
    Assignee: Arizona Board of Regents on behalf of the University of Arizona
    Inventors: Peter E. Nolan, Andrew H. Cutler, David G. Lynch
  • Patent number: 5762898
    Abstract: An onion-like graphite 2 is produced by irradiating an electron beam to an amorphous carbon 3 under an active aluminum nanoparticle 1. By further irradiating the electron beam to the onion-like graphite 2 to intercalate aluminum atoms constituting the aluminum nanoparticle 1 in a space between (001) plane and (002) plane of the onion-like graphite 2 having a layer structure, an intercalation compound 4 is produced. Or, after the aluminum nanoparticles were driven and disposed on the onion-like graphite by electron beam, or the like, by irradiating the electron beam to intercalate aluminum atoms in the space between the (001) plane and the (002) plane of the onion-like graphite having a layer structure, the intercalation compound is produced.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: June 9, 1998
    Assignees: Research Development Corporation of Japan, Shin-Ichi Tanaka
    Inventors: BingShe Xu, Shun-ichiro Tanaka
  • Patent number: 5763719
    Abstract: A fullerene derivative of the formula I ##STR1## where the symbols and indices have the following meanings: F is a fullerene radical of the formula (C.sub.20+2m), where m is a number from 1 to 50R.sup.1 to R.sup.8 are identical or different and are each H, CO.sub.2 R.sup.9, CN, COR.sup.10, Cl, Br, I, F, OR.sup.11, C.sub.1 -C.sub.20 -alkyl, phenyl or H, R.sup.1 -R.sup.4 and/or R.sup.5, R.sup.7 can also be part of a cycloalipathic, cycloaromatic or cycloheteroaromatic system which in turn is substituted by C.sub.1 -C.sub.20 -alkyl, aryl, carboxyl, carbonyl, alkoxy, aryloxy, halogen, nitro, alcohol or amine, or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 can together be ##STR2## where R.sup.15 -R.sup.18 are each H, C.sub.1 -C.sub.20 -alkyl, F, Cl, Br, I or phenyl, andAR is the radical of a fused cyclo-aromatic system, and n is from 1 to 20 and a process for its preparation.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: June 9, 1998
    Assignee: Hoechst AG
    Inventors: Andreas Gugel, Pavel Belik, Klaus Mullen
  • Patent number: 5753088
    Abstract: Carbon nanotubes are produced by submerging carbonaceous anode and cathode electrodes in liquid nitrogen or other suitable liquefied materials such as helium or hydrogen, and passing a direct current between the electrodes to strike a plasma arc between the anode and cathode that erodes carbon from the anode and deposits carbon nanotubes on the surface of the cathode.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: May 19, 1998
    Assignee: General Motors Corporation
    Inventor: Charles Howard Olk
  • Patent number: 5747161
    Abstract: A graphite filament which has carbon as a basic structural unit and which have a tubular shape being formed with a helical structure with the carbon hexagons as a main structure and with an outer diameter of 30 nm or less. The tubular lattices a.sub.1 to a.sub.3 are a multiple structure and the interval between inner and outer adjacent tubules is about 0.34 nm, which is similar to the interval between basal planes of graphitic structure. The graphite filament is a new carbon filament material having a structure that is different from a normal graphite filament.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: May 5, 1998
    Assignee: NEC Corporation
    Inventor: Sumio Iijima
  • Patent number: 5711927
    Abstract: This invention relates to a method of purifying afullerenes by recrystallization of a fullerene-complexing agent complex and to a fullerene-complexing agent complex.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: January 27, 1998
    Inventors: Jerry L. Atwood, Colin L. Raston
  • Patent number: 5698497
    Abstract: Carbonaceous materials based on the fullerene molecules have been developed which allow for superconductivity. The fullerene materials are soluble in common solvents.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: December 16, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Robert Cort Haddon, Arthur Foster Hebard, Donald Winslow Murphy, Matthew Jonathan Rosseinsky
  • Patent number: 5698140
    Abstract: A hybrid material comprising an extremely porous, carbon-bearing substrate, such as a carbon-bearing aerogel, and fullerene molecules loaded in the pores of the substrate. The hybrid compound is obtained by several approaches, including chemical vapor infiltration of fullerenes into finished carbon-containing aerogels; infiltration of fullerenes during the solvent displacement step of aerogel preparation; and addition of fullerenes to solgel starting materials.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: December 16, 1997
    Assignee: The Arizona Board of Regents, on behalf of the University of Arizona
    Inventors: Lowell D. Lamb, Donald R. Huffman
  • Patent number: 5698174
    Abstract: The invention relates to a process for the chromatographic separation of fullerenes using a nonpolar aromatic solvent as eluant. Coke, anthracite and/or graphite are used as support material. The nonpolar solvent is the main constituent of the eluant.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: December 16, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Muller, Richard Broll, Eckhard Weber, Johann Daimer, Roland Muller
  • Patent number: 5698175
    Abstract: Disclosed is a process for purifying carbon nanotubes which has steps of 1) mixing carbon nanotubes which accompany carbon impurities with a reagent selected from a group consisting of oxidation agents, nitration agents and sulfonation agents in liquid phase, 2) reacting the carbon nanotubes with the reagent at a predetermined temperature in the liquid phase, wherein the carbon impurities except carbon nanotubes are selectively reacted to dissolve in the liquid phase, and 3) separating carbon nanotubes from which the impurities were released from the liquid phase then washing and drying it. A process for uncapping carbon nanotubes and a process for chemically modifying carbon nanotubes are also disclosed.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: December 16, 1997
    Assignee: NEC Corporation
    Inventors: Hidefumi Hiura, Thomas Ebbesen
  • Patent number: 5695734
    Abstract: A process for the isolation of carbon nanotubes from a mixture containing carbon nanotubes and graphite is disclosed, which includes the steps of:(a) reacting the mixture with a metal compound to intercalate the metal compound into the graphite;(b) reducing the reaction mixture obtained in step (a) to convert the intercalated metal compound to elemental metal;(c) heating the reduction mixture obtained in step (b) at a temperature of 450-600.degree. C. in an oxygen-containing atmosphere to selectively oxidize the graphite and the elemental metal; and(d) contacting the heated mixture obtained in step (c) with a liquid to dissolve the oxidized metal in the liquid and to separate the carbon nanotubes as a solid phase from the oxidized metal.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: December 9, 1997
    Assignee: Director-General of Agency of Industrial Science & Technology
    Inventors: Fumikazu Ikazaki, Kunio Uchida, Motoo Yumura, Satoshi Ohshima, Yasunori Kuriki, Hiroshi Hayakawa
  • Patent number: 5662876
    Abstract: A low-cost and facile method of purifying fullerenes to obtain a preparation enriched in a fullerene of selected molecular weight using activated carbon involves adding a fullarena mixture to the top end of a column comprising activated carbon, passing a solvent in which the selected molecular weight fullerene is soluble through the column, and recovering a fraction enriched in the selected molecular weight fullerene from the bottom end of the column. In addition to activated carbon, the column may further comprise silica gel, diatomaceous earth, or other materials which aid in column packing and eluent flow. The invention also provides for preparation of gram quantities of pure C.sub.60 and C.sub.70 fullerenes after a single column pass.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: September 2, 1997
    Assignee: University of South Carolina
    Inventors: James M. Tour, Walter A. Scrivens, Peter V. Bedworth
  • Patent number: 5650132
    Abstract: Hydrogen is produced from a hydrocarbon by contacting the hydrocarbon with fine particles of a carbonaceous material having an external surface area of at least 1 m.sup.2 /g at a temperature sufficient to pyrolyze the hydrocarbon.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: July 22, 1997
    Assignee: Director-General of Agency of Industrial Science and Technology
    Inventors: Kazuhisa Murata, Hirobumi Ushijima, Ken-ichi Fujita
  • Patent number: 5648056
    Abstract: A fullerene composite comprises a matrix formed of ultrafine fullerene such as, for example, C.sub.60 crystallite having diameters in the range of from 5 to 50 nm and a reinforcing member formed of a mixture consisting of carbon nanotubes, carbon nanocapsules, and inevitable indeterminate carbonaceous impurities and incorporated in the matrix. The amount of the reinforcing member incorporated in the matrix is in the range of from 15 to 45% by weight based on the amount of the matrix. Owing to the use of the reinforcing member which contains carbon nanotubes and carbon nanocapsules, the produced fullerene composite is enabled to acquire improved mechanical strength and resistance to deformation, and the wide applicabilities are endowed with fullerene composites.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: July 15, 1997
    Assignees: Research Development Corporation of Japan, Shun-ichiro Tanaka
    Inventor: Shun-ichiro Tanaka
  • Patent number: 5641466
    Abstract: A mixture of carbon nanotubes and impurity carbon materials, which include carbon nanoparticles and may possibly include amorphous carbon, is purified into carbon nanotubes of high purity by utilizing a significant difference in oxidizability between the nanotubes and the nanoparticles. The mixture is pulverized and heated in the presence of an oxidizing agent at a temperature in the range from 600.degree. to 1000.degree. C. until the impurity carbon materials are oxidized and dissipated into gas phase. The nanotubes remain almost unoxidized except for loss of some lengths from the tube tips. It is suitable to perform the heating in air or oxygen.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: June 24, 1997
    Assignee: NEC Corporation
    Inventors: Thomas Ebbesen, Pulickel M. Ajayan, Hidefumi Hiura
  • Patent number: 5620512
    Abstract: A method and system for manufacturing diamond film. The method involves forming a fullerene vapor, providing a noble gas stream and combining the gas with the fullerene vapor, passing the combined fullerene vapor and noble gas carrier stream into a chamber, forming a plasma in the chamber causing fragmentation of the fullerene and deposition of a diamond film on a substrate.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: April 15, 1997
    Assignee: University of Chicago
    Inventors: Dieter M. Gruen, Shengzhong Liu, Alan R. Krauss, Xianzheng Pan
  • Patent number: 5591312
    Abstract: This invention provides a method and apparatus for producing fullerene fibers by establishing an electric field between a needle electrode and an opposing electrode in the presence of carbon and a heat source. Carbon is directed by the electric field to the needle electrode and heated by the heat source to form a carbon-carbon bonded fullerene network. The needle electrode may be moved to lengthen the fullerene network into a fullerene fiber. Fullerene fibers of 0.5 cm or longer may be produced by this method.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: January 7, 1997
    Assignee: William Marsh Rice University
    Inventor: Richard E. Smalley
  • Patent number: 5589038
    Abstract: A light yet highly workable magnetic substance is disclosed which consists mainly of a wholly novel material, fine crystal spherical carbon represented by C.sub.n X.sub.m where n is an integer selected from the group consisting of 60, 70, 76, 84, etc., m represents a positive number not more than n and not zero, and X represents at least one of hydrogen, fluorine, chlorine, bromine and iodine.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: December 31, 1996
    Assignee: Sony Corporation
    Inventors: Masafumi Ata, Masataka Machida, Haruo Watanabe
  • Patent number: 5587141
    Abstract: Soot containing fullerenes is produced by impressing a DC voltage between a carbonaceous anode and a cathode in an airtight chamber maintained in an inert gas atmosphere to cause arc discharge to occur. After termination of the impression of the DC voltage, an inert gas is blown into the chamber to fluidize the soot. The fluidized soot is discharged from the chamber and is brought into contact with a solvent to recover the fullerenes.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: December 24, 1996
    Assignee: Director-General of Industrial Science and Technology
    Inventors: Satoshi Ohshima, Motoo Yumura, Yasunori Kuriki, Kunio Uchida, Fumikazu Ikazaki
  • Patent number: 5560898
    Abstract: Carbon nanotubes are isolated from a mixture containing the carbon nanotubes and graphite particles by a process including the steps of:finely pulverizing the mixture;dispersing the pulverized product in a liquid medium;centrifuging the resulting dispersion to obtain a supernatant containing carbon nanotubes and graphite particles having a particle size of 0.3 .mu.m or less;separating the supernatant into a solid phase and a liquid phase; andcalcining the solid phase in an oxygen-containing atmosphere at a temperature sufficient to burn the graphite particles and to leave the nanotubes.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: October 1, 1996
    Assignee: Director-General of Agency of Industrial Science and Technology
    Inventors: Kunio Uchida, Motoo Yumura, Satoshi Ohshima, Yasunori Kuriki, Kiyoshi Yase, Fumikazu Ikazaki
  • Patent number: 5558903
    Abstract: The invention relates to an improved synthesis of fullerene (C.sub.60) films, whereby improved purity and adhesion to a substrate are achieved. The invention is not limited to C.sub.60 molecules and other fullerenes and fullerene based materials, including for example, metallofullerenes, fluorinated fullerenes, and codeposition of fullerene and other solid lubricants. The invention also relates to the use of these fullerene materials in oils, greases, polymers and other materials, both organic and inorganic, for improving lubrication and wear life. The invention further relates to a process for the ion bombardment of fullerene materials, including but not limited to, C.sub.60 fullerene materials to improve their tribological properties.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: September 24, 1996
    Assignee: The Ohio State University
    Inventors: Bharat Bhushan, James V. Coe, Jr., Balkishan Gupta
  • Patent number: 5556517
    Abstract: This invention provides an improved process and apparatus for making fullerenes by vaporizing carbon and conducting the resulting carbon vapor to a dark zone for fullerene growth and annealing. In one embodiment concentrated solar energy is used to vaporize carbon. In a further embodiment, concentrated solar energy may be used to improve fullerene yields by vaporizing carbon and further to prevent carbon cluster formation until the carbon vapor passes into a dark zone for fullerene growth and annealing. The invention provides an improvement to increase the yield of any known process wherein carbon is vaporized under high light conditions, the improvement comprising providing a dark zone for fullerene growth and annealing.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 17, 1996
    Assignee: William Marsh Rice University
    Inventor: Richard E. Smalley
  • Patent number: 5543378
    Abstract: This invention relates to a composition, comprising a carbon nanostructure having a palladium crystallite encapsulated therein; and more particularly, to worm-like carbon nanostructures attached to a carbon cluster, the worm-like nanostructures being comprised of a plurality of connecting sections of carbon tubes terminating in an end portion which encapsulates a palladium crystallite within its internal cavity.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: August 6, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ying Wang
  • Patent number: 5510098
    Abstract: Methods of producing fullerenes in large-macroscopic quantities inexpensively is disclosed without using solid carbon material such as graphite. In a preferred embodiment, fullerenes are formed by a hot filament CVD procedure. The fullerenes occur in the soot that forms as a by-product on the edges of the substrate holder. Mass spectrum of soot deposits shows lines corresponding to C.sub.60. From the typical concentrations of gaseous species in the diamond-growing CVD chamber, hydrocarbon species including CH.sub.3 or C.sub.2 H.sub.2 can be the precursors for the formation of fullerenes in the CVD chamber. A method of using fullerenes to enhance the properties of rubber composites is also described.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: April 23, 1996
    Assignee: University of Central Florida
    Inventor: Lee Chow
  • Patent number: 5489477
    Abstract: A high-molecular weight carbon material in which cylindrical high-molecular weight carbon materials in the form of a cylindrical tube are bonded through a soccer ball-like spherical high-molecular weight carbon material as a point of junction, the respective cylindrical high-molecular weight carbon materials being formed by rolling a plane network composed of a benzene shell-like hexagonal molecule formed of covalent-bonded carbon atoms, and the soccer ball-like spherical high-molecular weight carbon material being formed of material including five- and six-membered carbon rings. The high-molecular weight carbon material is useful as a material for various functional devices.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: February 6, 1996
    Assignee: NEC Corporation
    Inventors: Kuniichi Ohta, Noriaki Hamada
  • Patent number: 5475172
    Abstract: Di-addended and tetra-addended Buckminster fullerenes are synthesized through the use of novel organoborane intermediates. The C.sub.60, C.sub.70, or higher fullerene is reacted with a borane such as BH.sub.3 in a solvent such as toluene to form an organoborane intermediate. Reaction of the organoborane such as hydrolysis with water or alcohol results in the product di-addended and tetra-addended fullerene in up to 30% yields. Dihydrofullerenes and tetrahydrofullerenes are produced by the process of the invention.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: December 12, 1995
    Assignee: Sandia Corporation
    Inventors: Paul A. Cahill, Craig C. Henderson
  • Patent number: 5462800
    Abstract: A silicon carbide coated carbon matrix/carbon fiber composite material is provided. The carbon composite base material, coated with silicon carbide, comprises a siliconized layer and a non-siliconized layer. The siliconized layer comprises silicon carbide matrix and non-siliconized carbon fibers. The siliconized layer also has a non-planar interface with a series of elongated protrusions penetrating into the surface the of non-siliconized layer. A gas-permeable intermediate coating formed on the carbon composite material can help produce such a siliconized layer.
    Type: Grant
    Filed: December 20, 1993
    Date of Patent: October 31, 1995
    Assignee: Toshiba Ceramics Co.
    Inventors: Hiraku Yamazaki, Teruo Sugai, Shigeo Kato, Haruo Tazoe, Shiroh Hotate, Iwao Goto
  • Patent number: 5458742
    Abstract: In isolating fullerenes from fullerene-containing soot the soot is heated by using microwaves to from 300.degree. to 800.degree. C. and the evaporating fullerenes are condensed.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: October 17, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Mueller, Uwe Wirth, Joachim Semel
  • Patent number: 5453413
    Abstract: Compounds consisting of two or more fullerenes (e.g., a C.sub.60 dimer) and a film or powder which includes covalently linked fullerene molecules. Also disclosed is a fullerene film or powder with gas molecules or atoms uniformly disposed therein, as well as a method of diffusing gas molecules or atoms into or through a film or powder made of pristine fullerene molecules.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: September 26, 1995
    Assignee: Nanotechnologies, Inc.
    Inventor: Peter C. Eklund