Patents Assigned to Unidym, Inc.
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Publication number: 20150334805Abstract: An electroluminescent (EL) device is described, comprising an EL material, an electrode and nanostructures. The nanostructures may form an interconnected network, and may be employed in the EL material and/or in the electrode. A second electrode is also described, wherein an electric field formed between the two electrodes excites phosphors in the EL material to produce light.Type: ApplicationFiled: November 21, 2007Publication date: November 19, 2015Applicant: Unidym, Inc.Inventors: Shripal Gandhi, Jeffrey Jue
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Patent number: 7811542Abstract: A method for making carbon nanotube particulates involves providing a catalyst comprising catalytic metals, such as iron and molybdenum or metals from Group VIB or Group VIIIB elements, on a support material, such as magnesia, and contacting the catalyst with a gaseous carbon-containing feedstock, such as methane, at a sufficient temperature and for a sufficient contact time to make small-diameter carbon nanotubes having one or more walls and outer wall diameters of less than about 3 nm. Removal of the support material from the carbon nanotubes yields particulates of enmeshed carbon nanotubes that retain an approximate three-dimensional shape and size of the particulate support that was removed. The carbon nanotube particulates can comprise ropes of carbon nanotubes. The carbon nanotube particulates disperse well in polymers and show high conductivity in polymers at low loadings. As electrical emitters, the carbon nanotube particulates exhibit very low “turn on” emission field.Type: GrantFiled: September 14, 2006Date of Patent: October 12, 2010Assignee: Unidym, Inc.Inventors: Kenneth O. McElrath, Yuemei Yang, Kenneth A. Smith, Xiaodong Hu
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Patent number: 7785557Abstract: A transparent and conductive film comprising at least one network of graphene flakes is described herein. This film may further comprise an interpenetrating network of other nanostructures, a polymer and/or a functionalization agent(s). A method of fabricating the above device is also described, and may comprise depositing graphene flakes in solution and evaporating solvent therefrom.Type: GrantFiled: September 24, 2008Date of Patent: August 31, 2010Assignee: Unidym, Inc.Inventors: George Gruner, David Hecht, Liangbing Hu
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Publication number: 20100096004Abstract: A solar cell comprising at least one nanostructure-film electrode is discussed. The solar cell may further comprise a different conducting material, such as a conducting polymer, to fill pores in the nanostructure-film. Additionally or alternatively, the solar cell may comprise an electrode grid superimposed on the nanostructure-film. Likewise, the solar cell may have a single or multiple active layer(s), wherein nanostructure-film(s) may form at least semi-transparent anode(s) and/or cathode(s) through use of buffer layer(s).Type: ApplicationFiled: October 25, 2006Publication date: April 22, 2010Applicant: UNIDYM, INC.Inventors: Liangbing Hu, David Hecht, George Gruner
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Publication number: 20090294966Abstract: A method of making an electrode, such as an interconnect for a semiconductor device, includes forming aligned carbon nanotubes using dielectrophoresis.Type: ApplicationFiled: May 27, 2008Publication date: December 3, 2009Applicants: UNIDYM, INC., DUKE UNIVERSITYInventors: Jie Liu, Anna Fontcuberta I Morral
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Patent number: 7566434Abstract: A method for separating single-wall carbon nanotubes from an aqueous slurry comprises adding a water-immiscible organic solvent to an aqueous slurry comprising single-wall carbon nanotubes, isolating at least some of the single-wall carbon nanotubes in the solvent, and removing the solvent from the single-wall carbon nanotubes to form dried single-wall carbon nanotubes. A spheroidal aggregate of single-wall carbon nanotubes is formed wherein the aggregate is approximately spherical and has a diameter in a range of about 0.1 and about 5 mm, and wherein the aggregate contains at least about 80 wt % single-wall carbon nanotubes. The spheroidal aggregates of single-wall carbon nanotubes are easily handled in industrial processes and are redispersable to single-wall carbon nanotubes and/or ropes of single-wall carbon nanotubes. This invention can also be applied to multi-wall carbon nanotubes.Type: GrantFiled: September 20, 2006Date of Patent: July 28, 2009Assignee: Unidym, Inc.Inventors: Yuemei Yang, Martin Grosboll, Eduardo Vega, Jr.
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Publication number: 20090085894Abstract: A touch screen comprising at least one nanostructure film and capable of detecting multiple touches occurring at the same time at distinct locations in a plane of the touch screen is described. The touch screen may comprise a sensing layer, a driving layer and/or a shielding layer. At least one of these layers may comprise a nanostructure film, and at least two of these layers may be formed on a common substrate.Type: ApplicationFiled: September 16, 2008Publication date: April 2, 2009Applicant: UNIDYM, INC.Inventors: Shripal Gandhi, David Thomas, JR.
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Publication number: 20090050601Abstract: A method of patterning a nanostructure film using a plasma is described. The nanostructure film may substantially comprise carbon and/or carbon nanotubes. The plasma may comprise an inert gas. The plasma may be applied to the nanostructure film at close to atmospheric pressure and room temperature.Type: ApplicationFiled: August 25, 2008Publication date: February 26, 2009Applicant: UNIDYM, INC.Inventors: Youngbae Park, Liangbing Hu
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Patent number: 7488875Abstract: A carbon nanotube material that comprises carbon nanotubes, a magnesia support and a catalyst metal can be purified by contacting it with a mixture comprising carbon dioxide and water. At least some of the magnesia support is reacted to form water-soluble compounds.Type: GrantFiled: December 3, 2004Date of Patent: February 10, 2009Assignee: Unidym, Inc.Inventors: Jeffrey L. Bahr, Yuemei Yang, Kenneth O. McElrath, Martin P. Grosboll, Aurelie Mayeux
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Publication number: 20090017211Abstract: A transparent and conductive film comprising at least one network of graphene flakes is described herein. This film may further comprise an interpenetrating network of other nanostructures, a polymer and/or a functionalization agent(s). A method of fabricating the above device is also described, and may comprise depositing graphene flakes in solution and evaporating solvent therefrom.Type: ApplicationFiled: September 24, 2008Publication date: January 15, 2009Applicant: UNIDYM, INC.Inventors: George Gruner, Liangbing Hu, David Hecht
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Publication number: 20080317982Abstract: A coated substrate comprising a nanostructure film formed on a non-planar substrate is described. The coated substrate may further be compliant, optically transparent and/or electrically conductive. Fabrication methods thereof are also described.Type: ApplicationFiled: October 15, 2007Publication date: December 25, 2008Applicant: UNIDYM, INC.Inventors: David Hecht, Liangbing Hu, Jeffrey Jue, George Gruner
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Publication number: 20080295456Abstract: A system and business method for maximizing the fabrication and distribution efficiency of transparent conductive carbon films, while at the same time preserving the desirable mechanical, electrical and optical properties of the films, are discussed. This system and method preferably employ a roll-to-roll fabrication process, environmental controls, testing of pertinent optoelectronic properties and packaging.Type: ApplicationFiled: February 23, 2007Publication date: December 4, 2008Applicant: UNIDYM, INC.Inventors: John Miller, Shripal Gandhi
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Patent number: 7449133Abstract: A transparent and conductive film comprising at least one network of graphene flakes is described herein. This film may further comprise an interpenetrating network of other nanostructures, a polymer and/or a functionalization agent(s).Type: GrantFiled: November 27, 2006Date of Patent: November 11, 2008Assignee: Unidym, Inc.Inventors: George Gruner, Liangbing Hu, David Hecht
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Publication number: 20080157080Abstract: A pixel electrode is provided, comprising a nanostructure-film deposited over an active matrix substrate, such that the pixel electrode makes electrical contact with an underlying layer. Similarly, auxiliary data pads and auxiliary gate pads are provided, which also comprise nanostructure-films deposited over an active matrix substrate, such that they make electrical contact with underlying layers.Type: ApplicationFiled: July 16, 2007Publication date: July 3, 2008Applicant: UNIDYM, INC.Inventors: George Gruner, Liangbing Hu, Young-Bae Park
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Publication number: 20080128397Abstract: A novel nanostructure-film patterning method is discussed, wherein a laser is employed to etch a nanostructure-film. The laser may be a solid state UV laser, and the nanostructure-film may be patterned while mounted and moving on a roll-to-roll apparatus.Type: ApplicationFiled: April 27, 2007Publication date: June 5, 2008Applicant: UNIDYM, INC.Inventor: Shripal Gandhi
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Publication number: 20080048996Abstract: Touch screen displays comprising at least one nanostructure-film, and fabrication methods thereof, are discussed. Nanostructure-films may comprise, for example, a network(s) of nanotubes, nanowires, nanoparticles and/or graphene flakes. Such films are preferably at least semi-transparent and relatively flexible, making them well-suited for use in a variety of touch screen applications.Type: ApplicationFiled: October 25, 2006Publication date: February 28, 2008Applicant: UNIDYM, INC.Inventors: Liangbing Hu, George Gruner
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Publication number: 20080023066Abstract: An optoelectronic device comprising at least one nanostructure-film electrode is discussed. The optoelectronic device may further comprise a different material, such as a polymer, to fill pores in the nanostructure-film. Additionally or alternatively, the optoelectronic device may comprise an electrode grid superimposed on the nanostructure-film.Type: ApplicationFiled: February 23, 2007Publication date: January 31, 2008Applicants: UNIDYM, INC., The Board of Trustees of the Leland Stanford Junior UniversityInventors: David Hecht, George Gruner, Mark Topinka, Michael McGehee
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Publication number: 20080001141Abstract: A doped nanostructure network, devices incorporating a doped nanostructure network and fabrication methods thereof are described. Dopant may be deposited by a solution-based method, and the dopant is preferably stable over an extended period of time. Networks according to embodiments of the present invention can exhibit conductivities in excess of 4000 S/cm.Type: ApplicationFiled: November 27, 2006Publication date: January 3, 2008Applicant: UNIDYM, INC.Inventors: George Gruner, David Hecht
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Publication number: 20070284557Abstract: A transparent and conductive film comprising at least one network of graphene flakes is described herein. This film may further comprise an interpenetrating network of other nanostructures, a polymer and/or a functionalization agent(s). A method of fabricating the above device is also described, and may comprise depositing graphene flakes in solution and evaporating solvent therefrom.Type: ApplicationFiled: November 27, 2006Publication date: December 13, 2007Applicant: UNIDYM, INC.Inventors: George Gruner, Liangbing Hu, David Hecht