Metallic Powder Or Flake Patents (Class 977/777)
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Publication number: 20100230798Abstract: A semiconductor device includes a metal carrier and a spacer element attached to the metal carrier. The semiconductor device includes a first sintered metal layer on the spacer element and a semiconductor chip on the first sintered metal layer.Type: ApplicationFiled: March 11, 2009Publication date: September 16, 2010Applicant: Infineon Technologies AGInventors: Ivan Nikitin, Joachim Mahler, Thomas Behrens
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Patent number: 7790286Abstract: Modified and functionalized metallic nanoclusters capable of providing an enhanced Raman signal from an organic Raman-active molecule incorporated therein are provided. For example, modifications include coatings and layers, such as adsorption layers, metal coatings, silica coatings, and organic layers. The nanoclusters are generally referred to as COINs (composite organic inorganic nanoparticles) and are capable of acting as sensitive reporters for analyte detection. A metal that enhances the Raman signal from the organic Raman-active compound is inherent in the nanocluster. A variety of organic Raman-active compounds and mixtures of compounds can be incorporated into the nanocluster.Type: GrantFiled: February 25, 2008Date of Patent: September 7, 2010Assignee: Intel CorporationInventors: Jingwu Zhang, Xing Su, Lei Sun
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Patent number: 7786178Abstract: A process for producing a fine silver particle colloidal dispersion which can simply form conductive silver layers and antimicrobial coatings by screen printing or the like. The process is characterized by having a reaction step of allowing an aqueous silver nitrate solution to react with a mixed solution of an aqueous iron(II) sulfate solution and an aqueous sodium citrate solution to form an agglomerate of fine silver particles, a filtration step of filtering the resultant agglomerate of fine silver particles to obtain a cake of the agglomerate of fine silver particles, a dispersion step of adding pure water to the cake to obtain a first fine silver particle colloidal dispersion of a water system in which dispersion the fine silver particles have been dispersed in the pure water, and a concentration and washing step of concentrating and washing the first fine silver particle colloidal dispersion of a water system.Type: GrantFiled: April 27, 2004Date of Patent: August 31, 2010Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Kenji Kato, Masaya Yukinobu
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Publication number: 20100216052Abstract: Alkaline membrane fuel cells designed with silver cathode catalysts include a catalyst layer comprising silver metal nano-particles and an anion-conducting ionomer. The silver nano-particles are mixed with a solution of the ionomer to form a catalyst ink that is applied to an alkaline membrane to form an ultra-thin cathode catalyst layer on the membrane surface.Type: ApplicationFiled: February 23, 2010Publication date: August 26, 2010Applicant: Cellera, Inc.Inventors: Shimshon Gottesfeld, Dario Dekel, David Stanislav Simakov
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Publication number: 20100216299Abstract: A method for producing a thin film promoter layer is disclosed. The method includes depositing a Group IV semiconductor ink on a substrate, the Group IV semiconductor ink including a set of Group IV semiconductor nanoparticles and a set of metal nanoparticles to form a porous compact. The method also includes heating the substrate to a first temperature between about 350° C. to about 765° C. and for a first time period between 5 min to about 3 hours.Type: ApplicationFiled: February 29, 2008Publication date: August 26, 2010Inventors: Dmitry Poplavskyy, Mason Terry
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Publication number: 20100208412Abstract: Provided are a ferroelectric material having good ferroelectricity and good insulation property, and a ferroelectric device using the ferroelectric material. In the present invention, the ferroelectric material includes a metal oxide having a perovskite-type crystal structure, in which: the metal oxide contains bismuth ferrite whose iron is substituted by manganese, and at least one of a copper oxide and a nickel oxide; the bismuth ferrite is substituted by manganese at a substitution ratio of 0.5 at. % or more to 20 at. % or less with respect to a total amount of iron and manganese; and at least one of the copper oxide and the nickel oxide is added in an amount of 0.5 mol % or more to 20 mol % or less with respect to the bismuth ferrite whose iron is substituted by manganese.Type: ApplicationFiled: February 4, 2010Publication date: August 19, 2010Applicants: CANON KABUSHIKI KAISHA, TOKYO UNIVERSITY OF SCIENCE EDUCATIONAL FOUNDATION ADMINISTRATIVE ORGANIZATIONInventors: Kenji Takashima, Makoto Kubota, Soichiro Okamura, Takashi Nakajima, Tomosato Okubo, Yosuke Inoue
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Publication number: 20100197481Abstract: Use of physical vapor deposition methodologies to deposit nanoscale gold on activating support media makes the use of catalytically active gold dramatically easier and opens the door to significant improvements associated with developing, making, and using gold-based, catalytic systems. The present invention, therefore, relates to novel features, ingredients, and formulations of gold-based, heterogeneous catalyst systems generally comprising nanoscale gold deposited onto a nanoporous support.Type: ApplicationFiled: April 8, 2010Publication date: August 5, 2010Inventors: LARRY A. BREY, Thomas E. Wood, Gina M. Buccellato, Marvin E. Jones, Craig S. Chamberlain, Allen R. Siedle
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Publication number: 20100186550Abstract: A process and apparatus for producing chain agglomerations of nano-scale metal particles includes feeding at least one decomposable moiety selected from the group consisting of organometallic compounds, metal complexes, metal coordination compounds and mixtures thereof into a reactor vessel; exposing the decomposable moiety to a source of energy sufficient to decompose the moiety and produce nano-scale metal particles; and deposit or collection of chain agglomerations of nano-scale metal particles.Type: ApplicationFiled: August 6, 2006Publication date: July 29, 2010Inventor: Robert A. Mercuri
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Patent number: 7763231Abstract: A process for producing carbon nanotubes includes carbon plasma generation with microwave energy, plasma stabilization, and product deposition. Stabilization homogenizes the plasma energy density and concentration, leading to a more efficient reactor. A transition metal catalyst and associated catalyst support are used to form the end product. The formation region may have variations of geometry and supporting equipment that will affect the rate and purity of production. The formation region is immediately downstream from the plasma stabilization region such that the apparatus may be mounted on a robotic arm for direct deposition of product.Type: GrantFiled: August 6, 2007Date of Patent: July 27, 2010Assignee: Lockheed Martin CorporationInventor: Slade H. Gardner
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Publication number: 20100183497Abstract: Systems and methods are disclosed herein for synthesizing ammonia using nano-size metal or metal alloy catalyst particles. Hydrogen and nitrogen gases are passed through a system comprising, for example, a bed of magnetite supporting nano-size iron or iron alloy catalyst particles having an optional oxide layer that forms the catalyst.Type: ApplicationFiled: March 31, 2010Publication date: July 22, 2010Applicant: QUANTUMSPHERE, INC.Inventors: R. Douglas CARPENTER, Kevin MALONEY
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Publication number: 20100172997Abstract: The present invention includes metal nanoparticles composition and methods of making and using the same by converting a metal (I) to a metal (0) and forming one or more metal nanoparticles from the metal (0). The one or more metal nanoparticles are stabilized with one or more biocompatible stabilizers to prevent agglomeration and make them amenable for biomedical applications.Type: ApplicationFiled: December 30, 2009Publication date: July 8, 2010Applicant: UNIVERSITY OF NORTH TEXASInventors: Mohammad A. Omary, Zhibing Hu, Sreekar Marpu, Oussama Elbjeirami
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Publication number: 20100172840Abstract: A lanthanoid metal catalyst for the formation carbon nanotubes from a carbon-containing gas mixture, a method for the formation of carbon nanotubes with the lanthanoid metal catalyst, endohedral carbon nanotube complexes containing lanthanoid metal atoms and/or ions, carbon nanotube imaging contrast agents, and a method for imaging living tissue with carbon nanotube imaging contrast agents are provided.Type: ApplicationFiled: September 29, 2009Publication date: July 8, 2010Applicant: The Research Foundation of State University of New YorkInventors: Balaji SITHARAMAN, Magdalena Swierczewska
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Patent number: 7749300Abstract: A method of forming bimetallic core-shell metal nanoparticles including a core of a first metal material and a shell of a second metal material, the method including photochemically producing metallic nanoparticle cores of the first metal material, and forming a shell of the second metal material around the cores. The shell can be formed by adding shell-forming precursor materials to a solution or suspension of the cores and photochemically forming the shells around the cores, or by separately photochemically producing metallic nanoparticles of the second metal material and mixing the metallic nanoparticles of the second metal material and the metallic nanoparticle cores to cause the metallic nanoparticles of the second metal material to form a shell around the metallic nanoparticle cores.Type: GrantFiled: June 5, 2008Date of Patent: July 6, 2010Assignee: Xerox CorporationInventors: Michelle N. Chretien, Yiliang Wu, Naveen Chopra
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Patent number: 7745004Abstract: A method for producing a magnetic particle forming a magnetic material for absorbing electromagnetic waves comprises the steps of mixing an organometallic complex or a metal salt with a chain polymer and dissolving the mixture in a solvent (step S1); raising the temperature of the mixture to reaction temperature (step S2), carrying out a reaction at the reaction temperature (step S3); and forming the magnetic particle having a structure that the periphery of each fine particle formed from the organometallic complex or the metal salt is surrounded by the chain polymer and recovering the formed magnetic particle after the reaction (step S4). The magnetic particle has a nanogranular structure to become a magnetic material for absorbing electromagnetic waves. Such a magnetic particle is produced by a wet reaction. Thus, a larger amount of magnetic particle can be produced by one reaction.Type: GrantFiled: October 25, 2005Date of Patent: June 29, 2010Assignees: Sony CorporationInventors: Katsumi Okayama, Kaoru Kobayashi, Koichiro Inomata, Satoshi Sugimoto, Yoshihiro Kato
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Publication number: 20100148132Abstract: Disclosed is a method suitable for large-scale producing silver nanostructures including nanoparticles and nanowires with high crystallization and purity in a short period of time. In this method, silver particles with mean diameter less than 200 nm and silver nanowires with length in micrometers are produced through a microwave-assisted wet chemistry method. Tens to hundreds grams of silver nanoparticles and nanowires are obtained in minutes by microwave irradiation treatment to a precursor pre-made by highly concentrated silver salt solution and other additives. These silver nanoparticles and nanowires have good dispersibility and are ideal for forming conductive adhesives.Type: ApplicationFiled: December 11, 2009Publication date: June 17, 2010Inventors: Qingkui Jiang, Zhenyu Chang, Mingyuan Ge, Yonghao Lu
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Patent number: 7732318Abstract: A fabricating method of a flat panel display device can reduce manufacturing costs of the flat panel display device. A fabricating method of a flat panel display device includes providing a conductive nanopowder thin film material having a first conductive nanopowder and a second conductive nanopowder, spreading the conductive nanopowder thin film material over a substrate, forming a conductive thin film pattern by patterning the conductive nanopowder thin film material, and forming a conductive thin film by baking the conductive thin film pattern, wherein the first conductive nanopowder is located in a middle of the conductive thin film and the second conductive nanopowder is located in an outer part of the conductive thin film.Type: GrantFiled: December 23, 2005Date of Patent: June 8, 2010Assignee: LG Display Co., Ltd.Inventors: Gee Sung Chae, Mi Kyung Park
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Publication number: 20100136785Abstract: A direct patterning method for manufacturing a metal layer of a semiconductor device is provided. The claimed method reduces the materials and hours required by prior methods such as the thin film depositing method for a substrate, and the photolithographic method for manufacturing a transistor. The preferred embodiment of the present invention comprises a step of defining the pattern of the seeder material and a step of selectively thin film deposition. The direct patterned technology for the seeder and a chemical bath deposition (CBD) are utilized to provide the thin film growing method with non-vacuum and selective deposition. The object of the invention is applied to produce the wire or electrode, within the semiconductor device, or to deposit and manufacture the thin film in the large-area transistor array or a reflective layer.Type: ApplicationFiled: February 3, 2010Publication date: June 3, 2010Applicants: TAIWAN TFT LCD ASSOCIATION, CHUNGHWA PICTURE TUBES, LTD., AU OPTRONICS CORP., QUANTA DISPLAY INC., HANNSTAR DISPLAY CORP, CHI MEI OPTOELECTRONICS CORP., INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, TOPOLY OPTOELECTRONICS CORP.Inventors: Ming-Nan HSIAO, Shin-Chuang Chiang, Bor-Chuan Chuang
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Patent number: 7727500Abstract: Disclosed are adhesive coating compositions containing a metal peroxide for producing clear colorless adhesive coatings on substrates, particularly micro particulate substrates. In one preferred embodiment the nanoparticle coatings are chemically active and function at a high level of efficiency due to the high total surface area of the micro particulate substrate. Also disclosed are coated substrates and compositions having nanoparticles bound to a substrate by the coating compositions.Type: GrantFiled: March 8, 2007Date of Patent: June 1, 2010Assignee: PURETI, Inc.Inventor: John W. Andrews
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Patent number: 7718094Abstract: A method for the formation of metallic nanoparticles, such as gold and silver nanoparticles, which involves, combining in a single solution, solvent, metal ions and copolymers under conditions such that metal nanoparticles are formed. The copolymers have both reducing components and stabilizing components. The method can be used to form metal nanoparticles having a desired shape and size.Type: GrantFiled: June 20, 2005Date of Patent: May 18, 2010Assignee: The Research Foundation of State University of New YorkInventors: Paschalis Alexandridis, Toshio Sakai
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Publication number: 20100113861Abstract: A process or method for treating cancer. In one embodiment, the method includes the steps of providing a plurality of metallic nanoparticles, wherein each of the plurality of metallic nanoparticles has a core formed with a first metallic material, and a shell formed with a non-metallic material containing carbon, and wherein the shell is formed to enclose the metallic core completely, introducing said metallic nanoparticles into a mammal such that said metallic nanoparticles selectively target at least one type of cancerous cell, and subsequently applying at least one radio frequency of electromagnetic waves to said mammal for a period of time effective to induce skin currents in the cores of the first metallic material of said metallic nanoparticles to cause heat generated locally around targeted at least one type of cancerous cell to kill said cancerous cell.Type: ApplicationFiled: October 27, 2009Publication date: May 6, 2010Applicant: BOARD OF TRUSTEES OF THE UNIVERSITY OF ARKANSASInventors: Alexandru S. Biris, Yang Xu, Zhongrui Li, Alexandru R. Biris
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Publication number: 20100108952Abstract: Metal nanoparticles, containing a copper core and thin layer of precious metals enclosing the core to prevent oxidization of copper, in which manufacturing the metal nanoparticles is economical efficiency because of increased copper content and since such metal nanoparticles contain a metal having high electrical conductivity such as silver for a thin layer, they can form a wiring having better conductivity than copper and there is little concern that silver migration may occur.Type: ApplicationFiled: September 22, 2009Publication date: May 6, 2010Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: In-Keun Shim, Young-Soo Oh, Jae-Woo Joung
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Patent number: 7708910Abstract: The present invention relates to ink jet printing ink consisting of an independently dispersed metal ultrafine particles-containing liquid dispersion in which the metal ultrafine particles having a particle size of not more than 100 nm are independently and uniformly dispersed and which is excellent in characteristic properties required for ink. The ink is used in the printing or the formation of conductive circuits using an ink jet printer.Type: GrantFiled: October 21, 2001Date of Patent: May 4, 2010Assignee: ULVAC, Inc.Inventors: Noriyuki Abe, Masaaki Oda
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Patent number: 7704866Abstract: A method for forming a contact to a substrate is disclosed. The method includes providing a substrate, the substrate being doped with a first dopant; and diffusing a second dopant into at least a first side of the substrate to form a second dopant region, the first side further including a first side surface area. The method also includes forming a dielectric layer on the first side of the substrate. The method further includes forming a set of composite layer regions on the dielectric layer, wherein each composite layer region of the set of composite layer regions further includes a set of Group IV semiconductor nanoparticles and a set of metal particles. The method also includes heating the set of composite layer regions to a first temperature, wherein at least some composite layer regions of the set of composite layer regions etch through the dielectric layer and form a set of contacts with the second dopant region.Type: GrantFiled: March 18, 2008Date of Patent: April 27, 2010Assignee: Innovalight, Inc.Inventors: Karel Vanheusden, Francesco Lemmi, Dmitry Poplavskyy, Mason Terry, Malcolm Abbott
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Publication number: 20100092832Abstract: A metal oxide thin film structure for a solid oxide fuel cell, prepared by a method comprising dispersing a metal oxide nanopowder in a metal oxide salt solution and subsequent coating of the resulting metal oxide powder dispersed sol and the metal oxide salt solution on a porous substrate, has excellent gas impermeability, excellent phase stability, and is devoid of cracks or pinholes.Type: ApplicationFiled: August 11, 2009Publication date: April 15, 2010Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Hae-Weon LEE, Jong Ho Lee, Eun Oak Oh, Ji-Won Son, Hae-Ryoung Kim, Hyoungchul Kim, Kyung-ryul Lee
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Publication number: 20100072434Abstract: It provides a method for preparing metal nanoparticles using a metal seed and metal nanoparticles including the metal seed, the method including: preparing a solution by adding a polymer surfactant in an alcohol solvent; heating the solution; forming a metal seed by adding a first metal salt of at least one metal salt selected from the group consisting of platinum, palladium and iridium in the heated solution; and adding a second metal salt into the solution including the metal seed. This method allows the production of uniform-sized nanoparticles under high concentration conditions in high yield and mass production in which the metal nanoparticles have high dispersion stability so that they are suitable for various application.Type: ApplicationFiled: May 8, 2009Publication date: March 25, 2010Inventors: Kwi-Jong Lee, Hyun-Joo Song, Dae-Ha Seo, Jong-Wook Jung, Dong-Hoon Kim
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Patent number: 7682875Abstract: A method comprises applying a paste comprising metal grains, a solvent, and a sintering inhibitor to one of a die and a metal layer. The method comprises evaporating the solvent in the paste and placing the one of the die and the metal layer on the other of the die and the metal layer such that the paste contacts the die and the metal layer. The method comprises applying a force to the one of the die and the metal layer and decomposing the sintering inhibitors to form a sintered joint joining the die to the metal layer.Type: GrantFiled: May 28, 2008Date of Patent: March 23, 2010Assignee: Infineon Technologies AGInventors: Karsten Guth, Ivan Nikitin
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Patent number: 7678707Abstract: Carbon nanotube apparatus, and methods of carbon nanotube modification, include carbon nanotubes having locally modified properties with the positioning of the modifications being controlled. More specifically, the positioning of nanotubes on a substrate with a deposited substance, and partially vaporizing part of the deposited substance etches the nanotubes. The modifications of the carbon nanotubes determine the electrical properties of the apparatus and applications such as a transistor or Shockley diode. Other applications of the above mentioned apparatus include a nanolaboratory that assists in study of merged quantum states between nanosystems and a macroscopic host system.Type: GrantFiled: July 31, 2007Date of Patent: March 16, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Francisco Santiago, Victor H. Gehman, Jr., Karen J. Long, Kevin A. Boulais
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Publication number: 20100062555Abstract: A method of crystallizing amorphous silicon comprises forming an amorphous silicon layer on a substrate; forming an insulating layer on the amorphous silicon layer; forming a heat distributing metal layer on the insulating layer; and forming a thermite layer on the heat distributing metal layer. Ignition heat is then applied to ignite the thermite layer and generate sufficient localized exothermic heat from the ignited thermite layer so as to crystallize the amorphous silicon layer. The substrate beneath the amorphous silicon layer can be a heat sensitive substrate which is not substantially deformed by the localized crystallizing heat applied to the top portion of the amorphous silicon layer by way of the heat distributing metal layer and the insulating layer.Type: ApplicationFiled: March 27, 2009Publication date: March 11, 2010Inventors: Tae-Hyung HWANG, Hyun-Jae KIM, Do-Kyung KIM, Woong-Hee JEONG, Choong-Hee LEE, Tae-Hun JUNG
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Publication number: 20100050872Abstract: The filter provided herein includes one or more nanofibers. In some examples of the filter, the nanofibers include one or more nanoparticles, in which the nanoparticles are at least partially surrounded by pockets.Type: ApplicationFiled: August 29, 2008Publication date: March 4, 2010Inventor: Kwangyeol LEE
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Publication number: 20100031848Abstract: The invention relates to Sn—Cu—Ag alloy nanoparticles, preparation method thereof and ink or paste using the alloy nanoparticles in which the alloy nanoparticles are suitable for metal ink having excellent electrical conductivity or solder materials having low calcinating temperature.Type: ApplicationFiled: May 8, 2009Publication date: February 11, 2010Inventors: Kwi-Jong LEE, Hyuck-Mo Lee, Hyun-Joon Song, Yun-Hwan Jo, Ji-Chan Park, Jung-Up Bang, Dong-Hoon Kim
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Publication number: 20100018765Abstract: The production process of an electromagnetic wave shielding material of the present invention comprises screen printing a conductive paste containing conductive particles, binder and solvent in a geometrical pattern on the surface of a transparent porous layer of a transparent resin substrate provided with the transparent porous layer, the porous layer containing as a main component thereof at least one type selected from the group consisting of an oxide ceramic, a non-oxide ceramic and a metal, followed by forming a conductive portion in a geometrical pattern on the surface of the transparent porous layer by heat treatment. An electromagnetic wave shielding material produced according to this production process has high electromagnetic wave shielding effects and superior transparency and visibility.Type: ApplicationFiled: May 26, 2006Publication date: January 28, 2010Applicant: Dainippon Ink and Chemicals ,Inc.Inventors: Wataru Suenaga, Atsushi Okada, Kohtaro Tanimura
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Publication number: 20100014799Abstract: An optical structure can include a nanocrystal on a surface of an optical waveguide in a manner to couple the nanocrystal to the optical field of light propagating through the optical waveguide to generate an emission from the nanocrystal.Type: ApplicationFiled: May 21, 2007Publication date: January 21, 2010Applicant: Massachusetts Institute of TechnologyInventors: Vladimir Bulovic, Ioannis Kymissis, Moungi G. Bawendi, Jonathan R. Tischler, Michael Scott Bradley, David Oertel, Jennifer Yu
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Patent number: 7648555Abstract: Disclosed is a method for carrying out a reaction in a microreaction chamber. Nanoparticles which have been advantageously subjected to specific reactions in the microreaction chamber are used for carrying out the reaction. The obtained reaction product, which is preferably also provided in the form of nanoparticles. can then be removed from the microreaction chamber. Advantageously, the ongoing reaction can be specifically influenced by using the microreaction chamber. Both endothermic and exothermic reactions can be carried out with an accurately predictable result by feeding energy in a dosed manner into/out of the reaction chamber.Type: GrantFiled: September 27, 2006Date of Patent: January 19, 2010Assignee: Siemens AktiengesellschaftInventors: Frank Arndt, Jens Dahl Jensen, Ursus Krüger, Hendrik Rönsch
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Publication number: 20100006134Abstract: A nanotube-shaped titania having an aspect ratio of 6 or greater can be produced by anodizing a titanium metal or an alloy containing mainly titanium in an electrolyte solution containing a halogen atom-containing ion, such as a perchloric acid aqueous solution.Type: ApplicationFiled: September 15, 2006Publication date: January 14, 2010Applicants: Nippon Oil Corporation, Kanagawa Academy of Science and TechnologyInventors: Keisuke Nakayama, Takaya Kubo, Yoshinori Nishikitani, Hideki Masuda
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Patent number: 7645327Abstract: Systems and methods for achieving filtration are provided that utilize agglomerates or granules of nanoparticles. The agglomerates or granules of nanoparticles may be used as and/or incorporated into a HEPA filtration system to remove solid or liquid submicron-sized particles, e.g., MPPS, in an efficient and efficacious manner. The filtration systems and methods are provided that utilize agglomerates or granules in a size range of about 100-500 microns. The agglomerates or granules of nanoparticles exhibit a hierarchical fractal structure. In the case of agglomerates of nanoparticles, porosities of 0.9 or greater are generally employed, and for granules of nanoparticles, porosities that are smaller than 0.9 may be employed. Filter media formed from the agglomerates or granules may be formed from materials such as carbon black and fumed silica, and may be employed in baffled or non-baffled filtration apparatus.Type: GrantFiled: May 2, 2006Date of Patent: January 12, 2010Assignee: New Jersey Institute of TechnologyInventors: Robert Pfeffer, Rajesh Dave, Stanislav Dukhin, Jose A. Quevedo, Qun Yu
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Publication number: 20090325789Abstract: A process and apparatus is disclosed for converting heavy hydrocarbon feed into lighter hydrocarbon products. The heavy hydrocarbon feed is slurried with a catalyst comprising iron oxide and alumina to form a heavy hydrocarbon slurry and hydrocracked to produce lighter hydrocarbons. The iron sulfide crystallites have diameters in the nanometer range.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Inventors: Alakananda Bhattacharyya, Beckay J. Mezza
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Patent number: 7638105Abstract: The present invention provides ?-alumina powders comprising ?-alumina particles of which at least 80% of the ?-alumina particles have a particle size of less than 100 nm. The invention also provides slurries, particularly aqueous slurries, which comprise ?-alumina powders of the invention. The invention further provides methods of manufacturing ?-alumina powders and ?-alumina slurries of the invention and methods of polishing using same.Type: GrantFiled: August 13, 2008Date of Patent: December 29, 2009Assignee: Saint-Gobain Ceramics & Plastics, Inc.Inventor: Yuhu Wang
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Patent number: 7635518Abstract: Magnetic nanostructures comprised of an assembly of magnetic nanorods held together by dipole forces in a dendritic pattern and their method of manufacture. The dendritic magnetic nanostructures are prepared at room temperature by applying a magnetic field to a reverse micelle system wherein at least one salt of a magnetic metal is being precipitated within the core of the reverse micelle.Type: GrantFiled: February 24, 2006Date of Patent: December 22, 2009Assignee: University of Louisiana at LafayetteInventor: Devesh Kumar Misra
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Patent number: 7625637Abstract: Metallic nanoparticles and processes for forming metallic nanoparticles. In one aspect, the invention is to a process for forming nanoparticles comprising the step of heating a solution comprising a first metal precursor and a nucleating agent (e.g., nucleate nanoparticles or a nucleate precursor) in the presence of a base under conditions effective to form the nanoparticles. The first metal precursor preferably comprises a cationic metal species having a low reduction potential. The invention is also to a nanoparticle or plurality of nanoparticles, each nanoparticle comprising a core having a largest dimension less than about 10 nm; and a metal layer substantially surrounding the core and having a largest dimension less than about 200 nm.Type: GrantFiled: May 31, 2006Date of Patent: December 1, 2009Assignee: Cabot CorporationInventor: Hyungrak Kim
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Publication number: 20090288517Abstract: A method of forming an ink, including photochemically producing stabilized metallic nanoparticles and formulating the nanoparticles into an ink.Type: ApplicationFiled: May 23, 2008Publication date: November 26, 2009Applicant: XEROX CORPORATIONInventors: Michelle N. CHRETIEN, Naveen CHOPRA, Matthew HEUFT, Peter M. KAZMAIER
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Publication number: 20090282948Abstract: Methods for forming nanostructures of various shapes are disclosed. Nanocubes, nanowires, nanopyramids and multiply twinned particles of silver may by formed by combining a solution of silver nitrate in ethylene glycol with a solution of poly(vinyl pyrrolidone) in ethylene glycol. Hollow nanostructures may be formed by reacting a solution of solid nanostructures comprising one of a first metal and a first metal alloy with a metal salt that can be reduced by the first metal or first metal alloy. Nanostructures comprising a core with at least one nanoshell may be formed by plating a nanostructure and reacting the plating with a metal salt.Type: ApplicationFiled: July 27, 2009Publication date: November 19, 2009Applicant: The University of WashingtonInventors: Younan Xia, Yugang Sun
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Publication number: 20090269269Abstract: The disclosed subject matter provides a copper oxide nanoparticle, a catalyst that includes the copper oxide nanoparticle, and methods of manufacturing and using the same. The catalyst can be used to catalyze a chemical reaction (e.g., oxidizing carbon monoxide (CO) to carbon dioxide (CO2)).Type: ApplicationFiled: October 14, 2008Publication date: October 29, 2009Applicant: The Trustees of Columbia University in City of New YorkInventors: Brian Edward White, Stephen O'Brien
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Patent number: 7608461Abstract: A method for producing metal nanoparticles that when associated with an analyte material will generate an amplified SERS spectrum when the analyte material is illuminated by a light source and a spectrum is recorded. The method for preparing the metal nanoparticles comprises the steps of (i) forming a water-in-oil microemulsion comprising a bulk oil phase, a dilute water phase, and one or more surfactants, wherein the water phase comprises a transition metal ion; (ii) adding an aqueous solution comprising a mild reducing agent to the water-in-oil microemulsion; (iii) stirring the water-in-oil microemulsion and aqueous solution to initiate a reduction reaction resulting in the formation of a fine precipitate dispersed in the water-in-oil microemulsion; and (iv) separating the precipitate from the water-in-oil microemulsion.Type: GrantFiled: September 16, 2005Date of Patent: October 27, 2009Assignee: Sandia CorporationInventors: Blake A. Simmons, Albert Alec Talin
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Patent number: 7594949Abstract: There are provided internally cross-linked, stables polymeric materials, in the form of substantially spherical particles, each particle consisting essentially of a single macromolecule. They have the unusual property of being soluble or dispersible in a liquid medium without significantly increasing the viscosity of the medium, rendering them potentially useful in imaging applications such as ink jet printers. They can be prepared by dissolving polymeric material in a solvent system to form a solution of the polymeric material at a concentration therein of less than the critical concentration for the polymer, causing the polymeric material to contract into an approximately spheroidal conformation in solution, cross-linking the polymeric material in solution in said spheroidal conformation so assumed, and recovering stable, cross-linked approximately spheroidal polymeric particles from the solution.Type: GrantFiled: April 28, 2006Date of Patent: September 29, 2009Assignee: G-Nano, LLCInventor: James E. Guillet
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Publication number: 20090239251Abstract: The invention relates to a method for detecting and/or qualifying nanoparticles whose mean size is less than 60 nm, which exhibit a plasmon resonance and are located on the top surface of a flat solid support. A device for carrying out the inventive method and the use thereof are also disclosed.Type: ApplicationFiled: November 9, 2006Publication date: September 24, 2009Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE(CNRS)Inventors: Emmanuel Fort, Christian Joel Claude Ricolleau, Sandrine Patricia Leveque-Fort, Eric Ronan Le Moal
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Patent number: 7592663Abstract: A flash memory device with a nanoscale floating gate and a method of manufacturing thereof are disclosed. At least one embodiment of the present invention provides a much simpler and easier method of manufacturing nanocrystals (or nanocrystallines) for the flash memory device than the conventional method. Since the nanocrystals are homogeneously dispersed as a polymer layer without agglomeration, size and density of the nanoparticles may be controlled. Additionally, one embodiment of the present invention provides memory devices with nanoscale floating gates, and related methods of manufacture, of high efficiency and cost effectiveness by employing electrically and chemically more stable nanoscale floating gates compared to conventional ones.Type: GrantFiled: September 28, 2006Date of Patent: September 22, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Tae-Whan Kim, Young-Ho Kim, Chong-Seung Yoon, Jae-Ho Kim, Jae-Hun Jung, Sung-Keun Lim, Mun-Seop Song
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Publication number: 20090226812Abstract: A method of preparing tin (Sn) nanoparticles based on a bottom-up approach is provided. The method includes combining a first solution comprising Sn ions with a second solution comprising a reducing agent. After the combination, the Sn ions and the reducing agent undergo a reaction in which at least some of the Sn ions are reduced to Sn nanoparticles. The first solution comprises a tin salt dissolved in a solvent; the second solution comprises an alkali metal and naphthalene dissolved in a solvent; and the combined solution further comprises a capping agent that moderates a growth of aggregates of the Sn nanoparticles.Type: ApplicationFiled: March 3, 2009Publication date: September 10, 2009Applicant: Lockheed Martin CorporationInventors: Justin S. GOLIGHTLY, Alfred A. ZINN
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Publication number: 20090223410Abstract: A method of producing metal nanoparticles in a high yield rate and uniform shape and size, which is thus suitable for mass production. In addition, metal nanoparticles are provided that have superior dispersion stability when re-dispersed in various organic solvents, which thus suitable for use as a conductive ink having high conductivity. The method of producing nanoparticles includes mixing a metal precursor with a copper compound to a hydrocarbon based solvent, mixing an amine-based compound to the mixed solution of the metal precursor with copper compound and hydrocarbon based solvent, and mixing a compound including one or more atoms having at least one lone pair, selected from a group consisting of nitrogen, oxygen, sulfur and phosphorous to the mixed solution of the amine-based compound, metal precursor with a copper compound and hydrocarbon based solvent.Type: ApplicationFiled: August 4, 2006Publication date: September 10, 2009Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Byung-Ho Jun, Kwi-Jong Lee, Hye-Jin Cho, Jae-Woo Joung
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Patent number: 7582330Abstract: A method of making metallic nanostructures by mixing (a) an aqueous composition comprising a chromonic material with (b) a metal salt in solution or a suspension of metal particles.Type: GrantFiled: November 24, 2004Date of Patent: September 1, 2009Assignee: 3M Innovative Properties CounselInventor: Hassan Sahouani
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Publication number: 20090208364Abstract: The invention concerns a method for making a thermoelectric element consisting mainly of a crystalline alloy having a cubic structure, the alloy comprising a first constituent having at least a first element selected among the transition metals, a second constituent having at least one element selected among column XIV, XV or XVI of the periodic table, and a third constituent having at least one constituent selected among rare earths, alkalis, alkaline earths or actinides. The method includes making the alloy in the form of nanopowders by mechanosynthesis. The invention also concerns the thermoelectric material obtained by implementing said method.Type: ApplicationFiled: April 5, 2006Publication date: August 20, 2009Applicant: Centre National de la Recherche Scientifique (CNRS)Inventors: David Berardan, Eric Alleno, Claude Godart, Eric Leroy