Patents by Inventor Chunming Niu

Chunming Niu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20100233585
    Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.
    Type: Application
    Filed: December 20, 2006
    Publication date: September 16, 2010
    Applicant: Nanosys, Inc.
    Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 7795125
    Abstract: The present invention relates to a system and process for producing a nanowire-material composite. A substrate having nanowires attached to a portion of at least one surface is provided. A material is deposited over the portion to form the nanowire-material composite. The process further optionally includes separating the nanowire-material composite from the substrate to form a freestanding nanowire-material composite. The freestanding nanowire material composite is optionally further processed into a electronic substrate. A variety of electronic substrates can be produced using the methods described herein. For example, a multi-color light-emitting diode can be produced from multiple, stacked layers of nanowire-material composites, each composite layer emitting light at a different wavelength.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: September 14, 2010
    Assignee: Nanosys, Inc.
    Inventors: Mihai A. Buretea, Jian Chen, Calvin Y. H. Chow, Chunming Niu, Yaoling Pan, J. Wallace Parce, Linda T. Romano, David P. Stumbo
  • Patent number: 7755038
    Abstract: The present invention generally discloses the use of a nanostructured non-silicon thin film (such as an alumina or aluminum thin film) on a supporting substrate which is subsequently coated with an active layer of a material such as silicon or tungsten. The base, underlying non-silicon material generates enhanced surface area while the active layer assists in incorporating and transferring energy to one or more analytes adsorbed on the active layer when irradiated with a laser during laser desorption of the analyte(s). The present invention provides substrate surfaces that can be produced by relatively straightforward and inexpensive manufacturing processes and which can be used for a variety of applications such as mass spectrometry, hydrophobic or hydrophilic coatings, medical device applications, electronics, catalysis, protection, data storage, optics, and sensors.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: July 13, 2010
    Assignee: Nanosys, Inc.
    Inventors: Chunming Niu, Robert Hugh Daniels, Robert S. Dubrow, Jay L. Goldman
  • Publication number: 20100173070
    Abstract: Porous and/or curved nanofiber bearing substrate materials are provided having enhanced surface area for a variety of applications including as electrical substrates, semipermeable membranes and barriers, structural lattices for tissue culturing and for composite materials, production of long unbranched nanofibers, and the like. A method of producing nanofibers is disclosed including providing a plurality of microparticles or nanoparticles such as carbon black particles having a catalyst material deposited thereon, and synthesizing a plurality of nanofibers from the catalyst material on the microparticles or nanoparticles. Compositions including carbon black particles having nanowires deposited thereon are further disclosed.
    Type: Application
    Filed: March 1, 2010
    Publication date: July 8, 2010
    Applicant: NANOSYS, INC.
    Inventor: Chunming Niu
  • Publication number: 20100155696
    Abstract: A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.
    Type: Application
    Filed: March 1, 2007
    Publication date: June 24, 2010
    Applicant: NANOSYS, INC.
    Inventors: Xiangfeng Duan, Chunming Niu, Stephen Empedocles, Linda T. Romano, Jian Chen, Vijendra Sahi, Lawrence Bock, David Stumbo, J. Wallace Parce, Jay L. Goldman
  • Publication number: 20100140160
    Abstract: This invention provides novel nanofiber enhanced surface area substrates and structures comprising such substrates, as well as methods and uses for such substrates.
    Type: Application
    Filed: December 29, 2008
    Publication date: June 10, 2010
    Applicant: Nanosys, Inc.
    Inventors: Robert S. Dubrow, Chunming Niu
  • Patent number: 7651944
    Abstract: Methods of positioning and orienting nanostructures, and particularly nanowires, on surfaces for subsequent use or integration. The methods utilize mask based processes alone or in combination with flow based alignment of the nanostructures to provide oriented and positioned nanostructures on surfaces. Also provided are populations of positioned and/or oriented nanostructures, devices that include populations of positioned and/or oriented nanostructures, systems for positioning and/or orienting nanostructures, and related devices, systems and methods.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: January 26, 2010
    Assignee: Nanosys, Inc.
    Inventors: Xiangfeng Duan, R. Hugh Daniels, Chunming Niu, Vijendra Sahi, James M. Hamilton, Linda T. Romano
  • Publication number: 20090317044
    Abstract: This invention provides composite materials comprising nanostructures (e.g., nanowires, branched nanowires, nanotetrapods, nanocrystals, and nanoparticles). Methods and compositions for making such nanocomposites are also provided, as are articles comprising such composites. Waveguides and light concentrators comprising nanostructures (not necessarily as part of a nanocomposite) are additional features of the invention.
    Type: Application
    Filed: September 4, 2009
    Publication date: December 24, 2009
    Applicant: NANOSYS, INC.
    Inventors: Mihai Buretea, Stephen Empedocles, Chunming Niu, Erik C. Scher
  • Patent number: 7603003
    Abstract: This invention provides composite materials comprising nanostructures (e.g., nanowires, branched nanowires, nanotetrapods, nanocrystals, and nanoparticles). Methods and compositions for making such nanocomposites are also provided, as are articles comprising such composites. Waveguides and light concentrators comprising nanostructures (not necessarily as part of a nanocomposite) are additional features of the invention.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: October 13, 2009
    Assignee: Nanosys, Inc
    Inventors: Mihai A. Bureatea, Stephen A. Empedocles, Chunming Niu, Erik C. Scher
  • Patent number: 7595528
    Abstract: Methods and apparatuses for nanoenabled memory devices and anisotropic charge carrying arrays are described. In an aspect, a memory device includes a substrate, a source region of the substrate, and a drain region of the substrate. A population of nanoelements is deposited on the substrate above a channel region, the population of nanolements in one embodiment including metal quantum dots. A tunnel dielectric layer is formed on the substrate overlying the channel region, and a metal migration barrier layer is deposited over the dielectric layer. A gate contact is formed over the thin film of nanoelements. The nanoelements allow for reduced lateral charge transfer. The memory device may be a single or multistate memory device.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: September 29, 2009
    Assignee: Nanosys, Inc.
    Inventors: Xiangfeng Duan, Calvin Y. H. Chow, David L. Heald, Chunming Niu, J. Wallace Parce, David P. Stumbo
  • Patent number: 7578989
    Abstract: Compositions including carbide-containing nanorods and/or oxycarbide-containing nanorods and/or carbon nanotubes bearing carbides and oxycarbides and methods of making the same are provided. Rigid porous structures including oxycarbide-containing nanorods and/or carbide containing nanorods and/or carbon nanotubes bearing carbides and oxycarbides and methods of making the same are also provided. The compositions and rigid porous structures of the invention can be used either as catalyst and/or catalyst supports in fluid phase catalytic chemical reactions. Processes for making supported catalyst for selected fluid phase catalytic reactions are also provided.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: August 25, 2009
    Assignee: Hyperion Catalysis International, Inc.
    Inventors: David Moy, Chunming Niu, Jun Ma, Jason M. Willey
  • Patent number: 7553371
    Abstract: Porous and/or curved nanofiber bearing substrate materials are provided having enhanced surface area for a variety of applications including as electrical substrates, semipermeable membranes and barriers, structural lattices for tissue culturing and for composite materials, production of long unbranched nanofibers, and the like.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: June 30, 2009
    Assignee: Nanosys, Inc.
    Inventors: Robert Dubrow, Carlos Guillermo Casillas, William P. Freeman, Jay L. Goldman, Veeral Dilip Hardev, Francisco Leon, Chunming Niu, Cheri X. Y. Pereira
  • Publication number: 20090143227
    Abstract: Porous and/or curved nanofiber bearing substrate materials are provided having enhanced surface area for a variety of applications including as electrical substrates, semipermeable membranes and barriers, structural lattices for tissue culturing and for composite materials, production of long unbranched nanofibers, and the like.
    Type: Application
    Filed: January 11, 2006
    Publication date: June 4, 2009
    Applicant: NANOSYS, Inc.
    Inventors: Robert Dubrow, Carlos Guillermo Casillas, William P. Freeman, Jay L. Goldman, Veeral Dilip Hardev, Francisco Leon, Chunming Niu, Cheri X. Y. Pereira
  • Publication number: 20090124034
    Abstract: The present invention generally discloses the use of a nanostructured non-silicon thin film (such as an alumina or aluminum thin film) on a supporting substrate which is subsequently coated with an active layer of a material such as silicon or tungsten. The base, underlying non-silicon material generates enhanced surface area while the active layer assists in incorporating and transferring energy to one or more analytes adsorbed on the active layer when irradiated with a laser during laser desorption of the analyte(s). The present invention provides substrate surfaces that can be produced by relatively straightforward and inexpensive manufacturing processes and which can be used for a variety of applications such as mass spectrometry, hydrophobic or hydrophilic coatings, medical device applications, electronics, catalysis, protection, data storage, optics, and sensors.
    Type: Application
    Filed: May 15, 2008
    Publication date: May 14, 2009
    Applicant: NANOSYS, INC.
    Inventors: Chunming Niu, R. Hugh Daniels, Robert S. Dubrow, Jay L. Goldman
  • Publication number: 20090075468
    Abstract: The present invention relates to a system and process for producing a nanowire-material composite. A substrate having nanowires attached to a portion of at least one surface is provided. A material is deposited over the portion to form the nanowire-material composite. The process further optionally includes separating the nanowire-material composite from the substrate to form a freestanding nanowire-material composite. The freestanding nanowire material composite is optionally further processed into a electronic substrate. A variety of electronic substrates can be produced using the methods described herein. For example, a multi-color light-emitting diode can be produced from multiple, stacked layers of nanowire-material composites, each composite layer emitting light at a different wavelength.
    Type: Application
    Filed: November 20, 2008
    Publication date: March 19, 2009
    Applicant: NANOSYS, INC.
    Inventors: Mihai Buretea, Jian Chen, Calvin Chow, Chunming Niu, Yaoling Pan, J. Wallace Parce, Linda T. Romano, David Stumbo
  • Publication number: 20090017363
    Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.
    Type: Application
    Filed: September 19, 2008
    Publication date: January 15, 2009
    Applicant: NANOSYS, INC.
    Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Publication number: 20090010608
    Abstract: This invention provides composite materials comprising nanostructures (e.g., nanowires, branched nanowires, nanotetrapods, nanocrystals, and nanoparticles). Methods and compositions for making such nanocomposites are also provided, as are articles comprising such composites. Waveguides and light concentrators comprising nanostructures (not necessarily as part of a nanocomposite) are additional features of the invention.
    Type: Application
    Filed: September 17, 2008
    Publication date: January 8, 2009
    Applicant: NANOSYS, INC.
    Inventors: Mihai Buretea, Stephen Empedocles, Chunming Niu, Erik C. Scher
  • Patent number: 7468315
    Abstract: The present invention relates to a system and process for producing a nanowire-material composite. A substrate having nanowires attached to a portion of at least one surface is provided. A material is deposited over the portion to form the nanowire-material composite. The process further optionally includes separating the nanowire-material composite from the substrate to form a freestanding nanowire-material composite. The freestanding nanowire material composite is optionally further processed into an electronic substrate. A variety of electronic substrates can be produced using the methods described herein. For example, a multi-color light-emitting diode can be produced from multiple, stacked layers of nanowire-material composites, each composite layer emitting light at a different wavelength.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: December 23, 2008
    Assignee: Nanosys, Inc.
    Inventors: Mihai A. Buretea, Jian Chen, Calvin Y. H. Chow, Chunming Niu, Yaoling Pan, J. Wallace Parce, Linda T. Romano, David P. Stumbo
  • Publication number: 20080293244
    Abstract: Methods of positioning and orienting nanostructures, and particularly nanowires, on surfaces for subsequent use or integration. The methods utilize mask based processes alone or in combination with flow based alignment of the nanostructures to provide oriented and positioned nanostructures on surfaces. Also provided are populations of positioned and/or oriented nanostructures, devices that include populations of positioned and/or oriented nanostructures, systems for positioning and/or orienting nanostructures, and related devices, systems and methods.
    Type: Application
    Filed: August 5, 2008
    Publication date: November 27, 2008
    Applicant: NANOSYS, INC.
    Inventors: Xiangfeng Duan, Hugh Daniels, Chunming Niu, Vijendra Sahi, James Hamilton, Linda T. Romano
  • Publication number: 20080280169
    Abstract: The present invention is directed to nanowire structures and interconnected nanowire networks comprising such structures, as well as methods for their production. The nanowire structures comprise a nanowire core, a carbon-based layer, and in additional embodiments, carbon-based structures such as nanographitic plates consisting of graphenes formed on the nanowire cores, interconnecting the nanowire structures in the networks. The networks are porous structures that can be formed into membranes or particles. The nanowire structures and the networks formed using them are useful in catalyst and electrode applications, including fuel cells, as well as field emission devices, support substrates and chromatographic applications.
    Type: Application
    Filed: June 12, 2007
    Publication date: November 13, 2008
    Applicant: NANOSYS, Inc.
    Inventors: Chunming Niu, Baixin Qian, Ionel Stefan