And Settling Of Free Metal From Solution Patents (Class 75/371)
  • Patent number: 11311940
    Abstract: In one aspect, the present disclosure pertains to methods of making various noble metal nanoprisms, e.g., gold nanoprisms. In various aspects, the methods can comprise incubating, under dark conditions, a growth solution comprising: (a) a plurality of gold seed structures; (b) a gold precursor, and (c) a photocatalytic intermediary, such that during the incubating step multiply-twinned gold seed structures in the growth solution are preferentially enlarged. The disclosed methods can comprise separating the multiply-twinned gold seed structures from the growth solution based upon the size of the gold seed structures to produce an enriched growth solution. In some aspects, the methods comprise irradiating the enriched growth solution to produce the gold nanoprisms. In some aspects, the disclosed nanoprisms comprise silver.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: April 26, 2022
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Wei David Wei, Yueming Zhai
  • Patent number: 11162007
    Abstract: A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: November 2, 2021
    Assignee: Alpha Assembly Solutions Inc.
    Inventors: Shamik Ghosal, Ranjit Pandher, Oscar Khaselev, Ravi Bhatkal, Rahul Raut, Bawa Singh, Morgana de Avila Ribas, Siuli Sarkar, Sutapa Mukherjee, Sathish Kumar, Remya Chandran, Pavan Vishwanath, Ashok Pachamuthu, Monnir Boureghda, Nitin Desai, Anna Lifton, Nirmalya Kumar Chaki
  • Patent number: 10895023
    Abstract: Provided are a nanofiber-nanowire composite and a method for producing the same. The method includes preparing a nanoparticle using a dipolar solvent, producing a nanofiber-nanoparticle composite in an electrospinning synthesis solution including the nanoparticle through electrospinning, and growing a nanowire from the nanoparticle by hydrothermally synthesizing a dried nanofiber-nanoparticle composite.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: January 19, 2021
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Young Keun Kim, Bum Chul Park, Ji-Beom Shin
  • Patent number: 10532403
    Abstract: A method for synthesizing nanoparticles with a predetermined size at high or full yield comprises mixing a first precursor material comprising a first compound comprising a halide moiety and a metal or a metalloid, a second precursor material comprising a second compound comprising a polyatomic nonmetal, and a solvent. The method further comprises heating the mixture to colloidally form nanoparticles comprising the polyatomic nonmetal and the metal or metalloid. The halide moiety is selected such as to colloidally form the nanoparticles in a predetermined size range that is at least partially determined by this halide moiety.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: January 14, 2020
    Assignee: UNIVERSITEIT GENT
    Inventors: Mickael Tessier, Dorian Dupont, Zeger Hens
  • Patent number: 10500644
    Abstract: Provided a production method for reducing the content level of sulfur and carbon which are impurities in nickel powder to improve the quality of nickel powder produced by a complexing reduction method. The method of producing nickel powder having low carbon and sulfur concentrations includes: a complexing treatment of adding a complexing agent to a nickel sulfate aqueous solution to form a solution containing nickel complex ions; maintaining the solution containing nickel complex ions at a solution temperature of 150 to 250° C. in a pressure vessel and blowing hydrogen gas into the solution containing nickel complex ions to perform hydrogen reduction to produce nickel powder; washing the nickel powder with water; and then roasting the nickel powder washed with water in a mixed gas atmosphere of nitrogen and hydrogen.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: December 10, 2019
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Yoshitomo Ozaki, Shin-ichi Heguri, Kazuyuki Takaishi, Osamu Ikeda, Hideki Ohara, Tomoaki Yoneyama, Yohei Kudo
  • Patent number: 10226822
    Abstract: The present invention relates to a method for preparing metal nanoparticles, specifically, by reducing a precursor of metal or metal oxide in an aqueous solution, wherein polyethylenimine and an additional reducing agent are used, thereby obtaining metal nanoparticles having superior properties in improved yield. According to the preparation method of the present invention, metal nanoparticles can be prepared at a higher concentration of metal precursor. Further, a short reaction time and the use of a solvent that is easy to handle, such as water, allow mass production of metal nanoparticles with high efficiency. Moreover, nanoparticles having a superior property can be prepared without a high-temperature treatment over 100° C. Accordingly, the method for preparing metal nanoparticles of the present invention may innovatively simplify the preparation processes, and may also improve the working environment. Thus, it is useful for mass production of metal nanoparticles.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: March 12, 2019
    Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Woo-Sik Kim, Taekyung Yu, Aasim Shahzad, Minyoung Yi
  • Patent number: 10092955
    Abstract: Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially includes: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, a dispersant containing a sulfonate and an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: October 9, 2018
    Assignees: KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazumichi Yanagisawa, Junhao Zhang, Shin-ichi Heguri, Yoshitomo Ozaki, Kazuyuki Takaishi, Hideki Ohara, Tomoaki Yoneyama, Osamu Ikeda, Yohei Kudo
  • Patent number: 10000651
    Abstract: Provided are metal nanoparticle composite body whose multiple properties, such as a good metal nanoparticle control property, high dispersion stability, a good low-temperature firing property, and ease of purifying and separating metal nanoparticles, are intentionally added and controlled so that practical electrical conductivity can be exhibited, a metal colloidal solution in which the metal nanoparticle composite body is dispersed, and methods for producing these. A metal nanoparticle composite body includes a nitrogen-containing compound (A) and a metal nanoparticle (B), in which the nitrogen-containing compound (A) contains an oxidized nitrogen atom. A metal colloidal solution is obtained by dispersing the metal nanoparticle composite body in a medium. A method for producing a metal colloidal solution is characterized in that metal ions are reduced in a medium in the presence of a nitrogen-containing compound (A) containing an oxidized nitrogen atom so as to form metal nanoparticles (B).
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: June 19, 2018
    Assignee: DIC Corporation
    Inventors: Seungtaeg Lee, Tsuyoshi Morita, Masayuki Moriwaki, Akeo Takahashi, Tomoyo Kajii, Zongwu Yao
  • Patent number: 9751130
    Abstract: Embodiments of the present invention are directed to novel methods for the solution-based production of silver nanowires by adaptation of the polyol process. Some embodiments of the present invention can be practiced at lower temperature and/or at higher concentration than previously described methods. In some embodiments reactants are added in solid form rather than in solution. In some embodiments, an acid compound is added to the reaction.
    Type: Grant
    Filed: July 26, 2014
    Date of Patent: September 5, 2017
    Assignee: BASF SE
    Inventors: Yuliang Wang, Janet Cravens Dickerson
  • Patent number: 9721694
    Abstract: A method suitable for mass production of nanoparticles with a uniform particle diameter is provided. It is an object to provide a powder of the nanoparticle obtained by this method, a dispersion containing the nanoparticles, and a paste containing the nanoparticles. There is provided a method for manufacturing silver particles including the step of reducing silver in a silver solution containing a protective agent composed of an organic material and a copper component in an amount of 1 to 1,000 ppm relative to the amount of silver to obtain particles having an average particle diameter (DTEM) of 5 to 100 nm as measured using a transmission electron microscope.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: August 1, 2017
    Assignee: DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Shuji Kaneda, Kimikazu Motomura, Tatsuya Kariyasu, Yutaka Hisaeda, Kosuke Iha
  • Patent number: 9682426
    Abstract: An aliphatic amine having a carbon number of not less than 6, such as octylamine, hexylamine or oleylamine, serving as an organic protective material is added to water serving as a solvent so that the molar ratio of the aliphatic amine with respect to silver of a silver compound is in the range of 0.05 to 6, a reducing agent, such as hydrazine or NaBH4, being added thereto so that the molar ratio of the reducing agent with respect to silver of the silver compound is in the range of 1 to 6, and the silver compound, such as a silver salt or a silver oxide, being added thereto so that the concentration of silver ions in the aqueous reaction solution is in the range of 0.01 to 1.0 mol/L, and then, the silver compound is reduced at a temperature of 10 to 50° C. to produce fine silver particles having an average primary particle diameter of 10 to 200 nm. Thus, there is provided a method for producing fine silver particles, the method being capable of inexpensively producing fine silver particles in a short time.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: June 20, 2017
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventors: Tomonori Shibayama, Takashi Hinotsu, Tatuya Kariyasu
  • Patent number: 9670564
    Abstract: Described herein are methods of making metallic or elemental silver. These methods generally include a step of forming a reaction dispersion that includes a silver-containing compound, an organic acid, and a solvent that includes an alcohol, followed by mixing the reaction dispersion for a time and at a temperature effective to form a reaction product that includes metallic silver from a cationic silver species of the silver-containing compound. Also described herein are metallic or elemental silver produced by these methods.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: June 6, 2017
    Assignee: CORNING INCORPORATED
    Inventors: Benedict Yorke Johnson, Samuel Odei Owusu
  • Patent number: 9662710
    Abstract: A method of manufacturing silver nanowires includes: forming a first solution including a dispersion stabilizer and a polyol; forming a second solution including a dispersion stabilizer, a silver precursor, a halogen-ion donor, deionized water, and the polyol; forming a third solution by adding the second solution to the first solution; heating the third solution from a first temperature to a second temperature; and forming silver nanowires by maintaining the third solution at the second temperature.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: May 30, 2017
    Inventors: Hyun-Woo Koo, Tae-Woong Kim, Jung-Yong Lee, Jaemin Lee, Seonju Jeong
  • Patent number: 9623481
    Abstract: Provided herein is a nanostructure refined by suspending an unrefined nanostructure with a solvent, dispersing the suspended nanostructure in an acidic solution and agitating the acidic solution to produce a refined nanostructure.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: April 18, 2017
    Assignee: THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW YORK
    Inventors: Stanislaus Wong, Christopher Koenigsmann
  • Patent number: 9567349
    Abstract: Provided is a preparing method of an Ag nano-particle for mass-producing Ag nano-particles, the method including: performing a first reaction of a reaction solution containing an Ag precursor and oleylamine at a set first temperature T1; performing a second reaction of the reaction solution at a second temperature T2 set so as to be higher than the first temperature; and obtaining a reactant from the reaction solution, wherein at least one of the first and second reactions is performed in a state in which the reaction solution is not stirred.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 14, 2017
    Assignee: KOREA BASIC SCIENCE INSTITUTE
    Inventors: Gaehang Lee, Yeon Suk Choi, Doo Ri Bae
  • Patent number: 9393624
    Abstract: A preparation method of silver nanowires is provided. First, droplets of an ethylene glycol solution of silver nitrate is atomized by ultra-sonication and then added into a heated solution containing polyvinylpyrrolidone and sodium chloride to form silver nanowires. Comparing with the method without the ultra-sonication, the above method can increase the yield and the aspect ratio of the silver nanowires.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: July 19, 2016
    Assignee: TAIWAN TEXTILE RESEARCH INSTITUTE
    Inventors: Shiao-Yen Lee, Jui-Chi Lin, Pei-Fen Yang, Ting-Yu Wu, Yi-Hsiang Hsu
  • Patent number: 9388480
    Abstract: Methods for producing silver nanostructures with improved dimensional control, yield, purity, monodispersity, and scale of synthesis.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: July 12, 2016
    Assignee: University of Washington
    Inventors: Younan Xia, Sang-Hyuk Im, Yugang Sun, Yun Tack Lee, Benjamin Wiley
  • Patent number: 9067261
    Abstract: The process for making silver powder particles with very small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: June 30, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Roberto Irizarry, Haixin Yang
  • Patent number: 9068245
    Abstract: A process for the recovery of gold from a gold-bearing aqueous filtrate, the process comprising the steps of: (A) Contacting the aqueous filtrate with dibutyl carbitol (DBC) in a two-stage solvent extraction process to remove the gold from the aqueous filtrate into the DBC to form a gold-loaded DBC; and (D) Contacting the gold-loaded DBC with an aqueous acid scrub of hydrochloric acid in a four-stage countercurrent scrub process to remove impurities, e.g., non-gold metal, from the DBC into the aqueous scrub solution to form an impurity-loaded aqueous scrub. Each stage of the solvent extraction circuit and the aqueous acid scrub circuit is equipped with a mixing assembly and a phase separation tank in a head-tail arrangement such that the mixing assembly of one stage is adjacent to the phase separation tank of the adjacent stage.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: June 30, 2015
    Assignee: Kennecott Utah Copper LLC
    Inventors: Shijie Wang, Daniel Kim
  • Patent number: 9039804
    Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies and reduced nitric oxide co-production relative to previous methods. Such materials are useful in electronic applications.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: May 26, 2015
    Assignee: Carestream Health, Inc.
    Inventors: David R. Whitcomb, William D. Ramsden
  • Publication number: 20150118496
    Abstract: The present application provides a method for fabricating hollow metal nano particles and hollow metal nano particles fabricated by the same.
    Type: Application
    Filed: January 9, 2015
    Publication date: April 30, 2015
    Inventors: Jun Yeon CHO, Sang Hoon KIM, Gyo Hyun HWANG, Kwanghyun KIM
  • Patent number: 9017449
    Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies relative to previous methods. Such materials are useful in electronic applications.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: April 28, 2015
    Assignee: Carestream Health, Inc.
    Inventors: David R. Whitcomb, William D. Ramsden, Doreen C. Lynch
  • Patent number: 9017450
    Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies relative to previous methods. Such materials are useful in electronic applications.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: April 28, 2015
    Assignee: Carestream Health, Inc.
    Inventor: David R. Whitcomb
  • Patent number: 9011572
    Abstract: A method of generating hydrogen gas from the reaction of stabilized aluminum nanoparticles with water is provided. The stabilized aluminum nanoparticles are synthesized from decomposition of an alane precursor in the presence of a catalyst and an organic passivation agent, and exhibit stability in air and solvents but are reactive with water. The reaction of the aluminum nanoparticles with water produces a hydrogen yield of at least 85%.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: April 21, 2015
    Assignee: University of Dayton
    Inventors: Christopher E. Bunker, K. A. Shiral Fernando, Elena A. Guliants, Marcus J. Smith, Barbara A. Haruff
  • Publication number: 20150098883
    Abstract: The present invention disclosed use of lactam as a solvent in the preparation of nanomaterials by precipitation method, sol-gel method or high temperature pyrolysis. These methods are able to recycle lactam solvent, which meet requirements of environmental protection.
    Type: Application
    Filed: January 19, 2012
    Publication date: April 9, 2015
    Applicant: SHANGHAI GENIUS ADVANCED MATERIAL (GROUP) CO., LTD.
    Inventors: Housheng Xia, Guisheng Yang
  • Patent number: 8956439
    Abstract: Nanowire preparation methods, compositions, and articles are disclosed. Such methods, which reduce metal ions to metal nanowires in the presence of zero-valent metal atoms, are capable of producing long, narrow, nanowires useful for electronics and optical applications.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: February 17, 2015
    Assignee: Carestream Health, Inc.
    Inventor: David R. Whitcomb
  • Patent number: 8952087
    Abstract: The present invention provides a method for reducing metal ions (for example, silver ions) and stably dispersing metal nanoparticles by nanosilicate platelets. An organic dispersant, nanosilicate platelets and a metal ionic solution are mixed to perform a reductive reaction, wherein the organic dispersant is tri-sodium citrate dihydrate (SCD), chitosan or polyvinyl pyrrolidone (PVP), to produce a mixture of stably dispersed metal nanoparticles.
    Type: Grant
    Filed: October 25, 2008
    Date of Patent: February 10, 2015
    Assignee: National Taiwan University
    Inventors: Jiang-Jen Lin, Yi-Lin Liao, Chien-Chia Chu, Chih-Wei Chiu
  • Patent number: 8951330
    Abstract: The present invention provides a method for producing silver nanoparticles by employing ethanolamine. The method of this invention can be easily operated and no organic solvent is required. Ethanolamine first reacts with copolymers of poly(styrene-co-maleic anhydride) (abbreviated as SMA) to generate polymeric polymers. The polymeric polymers then reduce silver ions to silver atoms which are dispersed in the form of silver nanoparticles. Functional groups of the polymeric polymers can chelate with silver ions and be stably compatible with water or organic solvents, whereby the silver nanoparticles can be stably dispersed without aggregation and the produced silver nanoparticles.
    Type: Grant
    Filed: July 14, 2012
    Date of Patent: February 10, 2015
    Assignee: National Taiwan University
    Inventors: Jiang-Jen Lin, Wei-Cheng Tsai, Chao-Po Hsu, Wei-Li Lin, Yueh-Hsien Wu
  • Publication number: 20150030760
    Abstract: The invention addresses the problem of providing a method for producing microparticles. Provided is a method for producing microparticles. For the first process, seed microparticles are separated in a thin film fluid that forms between at least two processing surfaces, which are disposed facing each other, which can approach or separate from each other and at least one of which rotates relative to the other, and the fluid comprising the separated seed microparticles is discharged as a discharge fluid. Subsequently, for the second process, the separated seed microparticles are grown in the discharged discharge fluid to obtain the intended microparticles. Uniform and homogeneous micropartcles are obtained as a result of the microparticle producing method comprising the two process.
    Type: Application
    Filed: February 29, 2012
    Publication date: January 29, 2015
    Applicant: M. TECHNIQUE CO., LTD.
    Inventor: Masakazu Enomura
  • Publication number: 20150024204
    Abstract: The present invention relates a process of preparing a nanopowder by using a natural source starting material wherein the nano powder is a nano metal or nano alloy or nano metal oxide or nano metal carbide or nano compound or nano composite or nanofluid. The nano product produced by the process has novel properties such as enhanced hardness, antibacterial properties, thermal properties, electrical properties, abrasive resistant, wear resistant, superior frictional properties, sliding wear resistance, enhanced tensile strength, compression strengths, enhanced load bearing capacity and corrosion properties.
    Type: Application
    Filed: January 9, 2013
    Publication date: January 22, 2015
    Inventor: Sudhakara Sastry AMANCHI BALA
  • Patent number: 8882879
    Abstract: The invention provides a method for preparing nano silver particles comprising mixing polyvinyl pyrrolidone (PVP) and silver nitrate (AgNO3) in a solvent to form a reactive solution, heating the reactive solution to a temperature less than the boiling point of the solvent for the formation reaction of nano silver particles, adding an accelerating agent into the reactive solution during the formation reaction of the nano silver particles, and terminating the formation reaction when the size of the nano silver particles formed in the reaction solution reaches about 50 nm to 120 nm in diameter.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 11, 2014
    Assignee: BenQ Materials Corporation
    Inventors: Tsung-Ju Hsu, An-Ting Kuo
  • Patent number: 8876937
    Abstract: Methods of producing nanowires and resulting nanowires are described. In one implementation, a method of producing nanowires includes energizing (i) a metal-containing reagent; (ii) a templating agent; (iii) a reducing agent; and (iv) a seed-promoting agent (SPA) in a reaction medium and under conditions of a first temperature for at least a portion of a first duration, followed by a second temperature for at least a portion of a second duration, and the second temperature is different from the first temperature.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: November 4, 2014
    Assignee: Innova Dynamics, Inc.
    Inventors: Sheng Peng, Arjun Srinivas, Tom Credelle, Andrew Loxley, Gayatri Keskar
  • Patent number: 8870998
    Abstract: The invention relates to a method for producing metal nanoparticles, wherein metal ions are reduced by means of at least one reducing agent in the presence of at least one polymer stabilizer and are converted into metal nanoparticles. The invention further relates to metal nanoparticles obtained in this way and to the use thereof.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: October 28, 2014
    Assignee: BYK-Chemie GmbH
    Inventors: Ulrich Nolte, Michael Berkei, Thomas Sawilowski
  • Patent number: 8852316
    Abstract: The invention relates to a process for the preparation of silver nano particles comprising dissolving a surfactant in ethanol to obtain a first solution; dissolving a silver precursor in water to obtain a second solution; adding the second solution to the first solution to obtain a third solution; dissolving a reducing agent in water to obtain a reducing agent solution and adding the reducing agent solution to the third solution to obtain silver nano particles.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: October 7, 2014
    Assignee: TATA Chemicals Limited
    Inventors: Murali Sastry, Madakasira Narasimhachary Shashikala, Sumant Phadtare
  • Patent number: 8814979
    Abstract: Embodiments of the present invention are directed to novel methods for the solution-based production of silver nanowires by adaptation of the polyol process. Some embodiments of the present invention can be practiced at lower temperature and/or at higher concentration than previously described methods. In some embodiments reactants are added in solid form rather than in solution. In some embodiments, an acid compound is added to the reaction.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 26, 2014
    Assignee: Seashell Technology, LLC
    Inventor: Yuliang Wang
  • Patent number: 8808420
    Abstract: A process for producing nanoparticles comprises the steps of preparing silver seeds in the presence of a water soluble polyanionic polymer and growing the silver seeds to form nanoparticles. The polyanionic polymer may be poly(sodium styrenesulphonate).
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: August 19, 2014
    Assignee: The Provost, Fellows and Scholars of the College of the Holy and Undivided Trinity of Queen Elizabeth, Near Dublin
    Inventors: Damian John Aherne, Deirdre Marie Ledwith, John Moffat Kelly
  • Patent number: 8758477
    Abstract: The present invention provides a method for forming compositions having a plurality of ultra-fine metallic particles, and the metallic composition produced therewith. Also provided is a substrate coated with the plurality of ultra-fine metallic particles obtained in accordance with the method of the present invention.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: June 24, 2014
    Assignee: Clarkson University
    Inventors: Dan V Goia, Daniel Andreescu, Christopher Eastman
  • Patent number: 8741025
    Abstract: Methods of preparing metal nanowire are disclosed that employ quaternary phosphonium salts. Such processes can produce long and thin nanowires. Compositions and articles comprising such nanowires are useful in electronics applications.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: June 3, 2014
    Assignee: Carestream Health, Inc.
    Inventor: David R. Whitcomb
  • Patent number: 8741026
    Abstract: Branched nanowire preparation methods, compositions, and articles are disclosed. Such branched nanowires are useful for electronics and optical applications.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: June 3, 2014
    Assignee: Carestream Health, Inc.
    Inventor: David R. Whitcomb
  • Patent number: 8721763
    Abstract: A method for separating metal nanoparticles from colloidal metal solution includes providing a colloidal metal solution, including a plurality of metal nanoparticles; mixing a precipitating agent with the colloidal metal solution for maintaining the power of hydrogen value (pH) of the colloidal metal solution in a specific value; keeping the colloidal metal solution stationary for a static time at an environmental temperature such that the metal nanoparticle precipitates from the colloidal metal solution, and the colloidal metal solution forms a supernatant and a precipitating liquid; separating a precipitate from the precipitating liquid by a filtering process; and liquid blasting the precipitate by a first solvent to obtain the metal nanoparticles.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: May 13, 2014
    Assignee: Chung Shan Institute of Science and Technology
    Inventors: Ming-Tseh Tsay, Seng-Min Chang
  • Patent number: 8715387
    Abstract: The process for making silver powder particles with small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: May 6, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Roberto Irizarry, Haixin Yang
  • Publication number: 20140102255
    Abstract: The present invention is related to a method of preparing silver nanowire, wherein the method uses aldehyde derivatives as reducing agent to reduce silver salt with positive one valence of silver, to silver nanowire under the presence of organic accelerant. The preparation steps comprise: (A) providing a solution comprising an organic accelerant and an aldehyde derivative, heating the solution and then adding an acid into the solution to form a first solution; and (B) adding a silver salt solution with positive one valence of silver into the first solution to form silver nanowire.
    Type: Application
    Filed: February 8, 2013
    Publication date: April 17, 2014
    Applicant: NICHING INDUSTRIAL CORPORATION
    Inventors: Hsiang-An FENG, Chung-Hung CHANG, Hsin-Fang CHANG, Pei-Chen HUANG
  • Patent number: 8696786
    Abstract: The present invention relates to a new method for preparing anisotropic metal nanoparticles with high aspect ratios and different types of structures by means of catalysis by Atomic Quantum Clusters (AQCs).
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: April 15, 2014
    Assignees: Universidade de Santiago de Compostela, Nanogap Sub-NM Powder, Sociedad Anonima
    Inventors: Manuel Arturo Lopez Quintela, Jose Rivas Rey
  • Patent number: 8696787
    Abstract: Disclosed is a method for providing nanoporous palladium and platinum powders. These materials were synthesized on milligram to gram scales by chemical reduction of tetrahalo-complexes with ascorbate in a concentrated aqueous surfactant at temperatures between ?20° C. and 30° C. The prepared particles have diameters of approximately 50 nm, wherein each particle is perforated by pores having diameters of approximately 3 nm, as determined by electron tomography. These materials are of potential value for hydrogen and electrical charge storage applications.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: April 15, 2014
    Assignee: Sandia Corporation
    Inventors: David B. Robinson, Stephen J. Fares, Kim L. Tran, Mary E. Langham
  • Patent number: 8652232
    Abstract: A process is described for preparing cubic metallic nanoparticles, comprising: a) preparing an aqueous solution containing a source of a metal from group VIII, a reducing agent R1 and a stabilizer; b) preparing an aqueous solution containing a source of a group VIII metal and a stabilizer at a temperature strictly higher than 70° C. and less than or equal to 80° C.; c) mixing at least a portion of the aqueous solution obtained in step a) with the aqueous solution obtained in step b) to obtain, in the presence of a reducing agent R2, metallic nanoparticles in the cubic form representing at least 70% by number of the entire quantity of metallic nanoparticles which are formed; d) depositing said metallic nanoparticles derived from step c) on a support.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: February 18, 2014
    Assignee: IFP Energies nouvelles
    Inventors: Laure Bisson, Cecile Thomazeau, Clement Sanchez, Cedric Boissiere
  • Publication number: 20140033870
    Abstract: A method for separating metal nanoparticles from colloidal metal solution includes providing a colloidal metal solution, including a plurality of metal nanoparticles; mixing a precipitating agent with the colloidal metal solution for maintaining the power of hydrogen value (pH) of the colloidal metal solution in a specific value; keeping the colloidal metal solution stationary for a static time at an environmental temperature such that the metal nanoparticle precipitates from the colloidal metal solution, and the colloidal metal solution forms a supernatant and a precipitating liquid; separating a precipitate from the precipitating liquid by a filtering process; and liquid blasting the precipitate by a first solvent to obtain the metal nanoparticles.
    Type: Application
    Filed: August 1, 2012
    Publication date: February 6, 2014
    Applicant: CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Ming-Tseh TSAY, Seng-Min CHANG
  • Patent number: 8641798
    Abstract: A one-step process for synthesizing gold-copper bimetallic nanocubes. The process comprises the step of simultaneously reducing a copper II salt and a gold halide by 1,2-hexadecanediol in diphenyl ether, and 1-dodecanethiol as well as surfactants 1-adamantanecarboxylic acid and 1-hexadecylamine. The copper II salt may be copper (II) acetylacetonate, copper chloride, copper sulfate, or copper phosphate. The gold halide may be chloroauric acid, gold chloride, gold bromide, or tetrabromoauric acid. The reduction may occur at a temperature between about 160 and 180 degrees Celsius. The copper II salt may be copper (II) acetylacetonate and the gold halide may be chloroauric acid.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: February 4, 2014
    Assignee: The United States of America, as represented by the Secretary of Commerce, NIST
    Inventors: Angela R. Hight-Walker, Yonglin Liu
  • Patent number: 8636823
    Abstract: A silver salt solution and a reducing agent solution are added to an aqueous dispersing polymer solution to precipitate silver ribbons.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: January 28, 2014
    Assignee: Ames Advanced Materials Corporation
    Inventor: Jason H. Rouse
  • Publication number: 20140001418
    Abstract: Provided are a method of isolating and purifying metal nanowires from a crude and complex reaction mixture that includes relatively high aspect ratio nanostructures as well as nanostructures of low aspect ratio shapes, and conductive films made of the purified nanostructures.
    Type: Application
    Filed: September 9, 2013
    Publication date: January 2, 2014
    Applicant: Cambrios Technologies Corporation
    Inventor: Pierre-Marc Allemand
  • Patent number: 8597397
    Abstract: Processes for the production of metal nanoparticles. In one aspect, the invention is to a process comprising the steps of mixing a heated first solution comprising a base and/or a reducing agent (e.g., a non-polyol reducing agent), a polyol, and a polymer of vinyl pyrrolidone with a second solution comprising a metal precursor that is capable of being reduced to a metal by the polyol. In another aspect, the invention is to a process that includes the steps of heating a powder of a polymer of vinyl pyrrolidone; forming a first solution comprising the powder and a polyol; and mixing the first solution with a second solution comprising a metal precursor capable of being reduced to a metal by the polyol.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: December 3, 2013
    Assignee: Cabot Corporation
    Inventors: Klaus Kunze, Hyungrak Kim, Allen B. Schult, Nathan E. Stott, Andrew M. Argo