Patents by Inventor Rodney S. Ruoff

Rodney S. Ruoff 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).

  • Patent number: 11879183
    Abstract: The present invention relates to a manufacturing method for single crystalline metal foil including: thermally treating poly-crystalline metal foil positioned to be spaced apart from a base to manufacture single crystalline metal foil, and a single crystalline metal foil manufactured thereby. According to the present invention, single crystalline metal foil having a large area may be obtained by thermally treating the poly-crystalline metal foil under a condition at which stress applied to the poly-crystalline metal foil is minimized.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: January 23, 2024
    Assignees: INSTITUTE FOR BASIC SCIENCE, UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Rodney S. Ruoff, Sunghwan Jin
  • Publication number: 20210310149
    Abstract: The present invention relates to a manufacturing method for single crystalline metal foil including: thermally treating poly-crystalline metal foil positioned to be spaced apart from a base to manufacture single crystalline metal foil, and a single crystalline metal foil manufactured thereby. According to the present invention, single crystalline metal foil having a large area may be obtained by thermally treating the poly-crystalline metal foil under a condition at which stress applied to the poly-crystalline metal foil is minimized.
    Type: Application
    Filed: June 22, 2021
    Publication date: October 7, 2021
    Inventors: Rodney S. RUOFF, Sunghwan JIN
  • Patent number: 11078594
    Abstract: The present invention relates to a manufacturing method for single crystalline metal foil including: thermally treating poly-crystalline metal foil positioned to be spaced apart from a base to manufacture single crystalline metal foil, and a single crystalline metal foil manufactured thereby. According to the present invention, single crystalline metal foil having a large area may be obtained by thermally treating the poly-crystalline metal foil under a condition at which stress applied to the poly-crystalline metal foil is minimized.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: August 3, 2021
    Assignees: INSTITUTE FOR BASIC SCIENCE, UNIST(ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Rodney S. Ruoff, Sunghwan Jin
  • Publication number: 20190242028
    Abstract: The present invention relates to a manufacturing method for single crystalline metal foil including: thermally treating poly-crystalline metal foil positioned to be spaced apart from a base to manufacture single crystalline metal foil, and a single crystalline metal foil manufactured thereby. According to the present invention, single crystalline metal foil having a large area may be obtained by thermally treating the poly-crystalline metal foil under a condition at which stress applied to the poly-crystalline metal foil is minimized.
    Type: Application
    Filed: July 12, 2017
    Publication date: August 8, 2019
    Inventors: Rodney S. RUOFF, Sunghwan JIN
  • Publication number: 20180320987
    Abstract: Sugar alcohol blends of galactitol and mannitol and compositions comprising such blends are disclosed as phase change materials (PCMs). A method of forming carbon nanotubes on a carbon substrate is described. Carbon substrates with carbon nanotubes, in particular, conformal layers of carbon nanotubes on carbon substrates, are also disclosed, as are methods of making and using these materials. Thermal storage units are also provided. The thermal storage units can comprise a heat exchange path through which a heat exchange medium flows, and a thermal storage medium in thermal contact with the heat exchange path.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 8, 2018
    Inventors: Alexandre K. Da Silva, Evan Fleming, Li Shi, Christopher W. Bielawski, Rodney S. Ruoff, Shaoyi Wen, Hengxing Ji, Michael Pettes, Abhijit Paul, Eunsu Paek, Alexander J. Pak, Daniel P. Sellan
  • Patent number: 10072355
    Abstract: A method of forming graphene single crystal domains on a carbon substrate is described.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: September 11, 2018
    Assignee: Board of Regents, The University of Texas System
    Inventors: Luigi Colombo, Rodney S. Ruoff, Yufeng Hao
  • Patent number: 10037855
    Abstract: Doped activated microwave expanded graphite oxide materials and doped monolayer graphene materials, and methods of making these materials. The materials exhibit increased capacitance relative to undoped activated microwave expanded graphite oxide and monolayer graphene. The materials are suitable for use in, for example, ultracapacitors.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: July 31, 2018
    Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Rodney S. Ruoff, Li Li Zhang, Meryl D. Stoller
  • Publication number: 20170010512
    Abstract: A hybrid transparent conductive film, and methods for fabricating such hybrid transparent conductive films, involving the assembly of two-dimensional graphene-based materials with one-dimensional silver and/or copper nanowires with high optical transmittance and good electrical conductivity. The hybrid films are characterized by a good degree of control of the architecture at the nanoscale level, where the weakness(es) of each component are offset by the strengths of the other components. By rational design of the structure and using simple and locate-cost fabrication methods, hybrid films with sheet resistance of 26 ohm/sq and optical transmittance (at ?=550 nm) of 83% for reduced graphene oxide/silver nanowire films, and 64 ohm/sq and optical transmittance of 93.6% for monolayer graphene/silver nanowire films have been fabricated. These values are comparable to transparent conductive films based on indium tin oxide but are now able to be used in flexible electronics due to their good mechanical properties.
    Type: Application
    Filed: September 21, 2016
    Publication date: January 12, 2017
    Inventors: Rodney S. Ruoff, Iskandar Kholmanov
  • Patent number: 9477128
    Abstract: A hybrid transparent conductive film, and methods for fabricating such hybrid transparent conductive films, involving the assembly of two-dimensional graphene-based materials with one-dimensional silver and/or copper nanowires with high optical transmittance and good electrical conductivity. The hybrid films are characterized by a good degree of control of the architecture at the nanoscale level, where the weakness(es) of each component are offset by the strengths of the other components. By rational design of the structure and using simple and locate-cost fabrication methods, hybrid films with sheet resistance of 26 ohm/sq and optical transmittance (at ?=550 nm) of 83% for reduced graphene oxide/silver nanowire films, and 64 ohm/sq and optical transmittance of 93.6% for monolayer graphene/silver nanowire films have been fabricated. These values are comparable to transparent conductive films based on indium tin oxide but are now able to be used in flexible electronics due to their good mechanical properties.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: October 25, 2016
    Assignee: Board of Regents, The University of Texas System
    Inventors: Rodney S. Ruoff, Iskandar Kholmanov
  • Publication number: 20160254102
    Abstract: Doped activated microwave expanded graphite oxide materials and doped monolayer graphene materials, and methods of making these materials. The materials exhibit increased capacitance relative to undoped activated microwave expanded graphite oxide and monolayer graphene. The materials are suitable for use in, for example, ultracapacitors.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Rodney S. Ruoff, Li Li Zhang, Meryl D. Stoller
  • Patent number: 9412484
    Abstract: Disclosed is a carbon material that can be useful, for example, in ultracapacitors. Also disclosed are applications and devices containing the carbon material.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: August 9, 2016
    Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Rodney S. Ruoff, Yanwu Zhu, Meryl D. Stoller, Shanthi Murali
  • Publication number: 20160209124
    Abstract: Sugar alcohol blends of galactitol and mannitol and compositions comprising such blends are disclosed as phase change materials (PCMs). A method of forming carbon nanotubes on a carbon substrate is described. Carbon substrates with carbon nanotubes, in particular, conformal layers of carbon nanotubes on carbon substrates, are also disclosed, as are methods of making and using these materials. Thermal storage units are also provided. The thermal storage units can comprise a heat exchange path through which a heat exchange medium flows, and a thermal storage medium in thermal contact with the heat exchange path.
    Type: Application
    Filed: August 29, 2014
    Publication date: July 21, 2016
    Inventors: Alexandre K. DA SILVAa, Evan FLEMING, Li SHI, Christopher W. BIELAWSKI, Rodney S. RUOFF, Shaoyi WEN, Hengxing JI, Michael PETTES, Abhijit PAUL, Eunsu PAEK, Alexander J. PAK, Daniel P. SELLAN
  • Publication number: 20160137507
    Abstract: A graphene transfer method using water vapor-assisted determination of CVD-grown graphene film on the Cu foil. By using the polymer film as a supporting layer, we found that graphene can be directly detached from the Cu foil as a consequence of water intercalated at the graphene-Cu interface(s), by a ‘dry transfer’ method. The delaminated graphene films are continuous over large area. This nondestructive method also worked for the transfer of graphene grown on a Cu single crystal without sacrificing the expensive crystal, thus affording the possibility of producing high-quality graphene and reusing the substrate. The Cu foil and single crystal can both be repeatedly used for many times, which may reduce the cost of graphene synthesis and is environmentally more benign. Our method affords the advantages of high efficiency, likely industrial scalability, minimal use of chemicals, and the reusability of the Cu foil in multiple growth and delamination cycles.
    Type: Application
    Filed: November 19, 2014
    Publication date: May 19, 2016
    Applicants: INSTITUTE FOR BASIC SCIENCE, UNIST ACADEMY-INDUSTRY RESEARCH CORPORATION
    Inventors: Xuequi YOU, Da Luo, Rodney S. Ruoff
  • Publication number: 20150292112
    Abstract: A method of forming graphene single crystal domains on a carbon substrate is described.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 15, 2015
    Applicant: Board of Regents, The University of Texas System
    Inventors: Luigi Colombo, Rodney S. Ruoff, Yufeng Hao
  • Publication number: 20150050482
    Abstract: Method for synthesizing large single-crystal graphene films by suppressing evaporative substrate loss in chemical vapor deposition, and graphene films synthesized thereby. The substrate may be configured as a tube prior to exposure to an organic compound at high temperature. Low flow rate of the gaseous carbon source may be employed, and this flow rate may be increased after an initial nucleation period.
    Type: Application
    Filed: August 14, 2013
    Publication date: February 19, 2015
    Inventors: Rodney S. Ruoff, Shanshan Chen
  • Publication number: 20140313562
    Abstract: A hybrid transparent conductive film, and methods for fabricating such hybrid transparent conductive films, involving the assembly of two-dimensional graphene-based materials with one-dimensional silver and/or copper nanowires with high optical transmittance and good electrical conductivity. The hybrid films are characterized by a good degree of control of the architecture at the nanoscale level, where the weakness(es) of each component are offset by the strengths of the other components. By rational design of the structure and using simple and locate-cost fabrication methods, hybrid films with sheet resistance of 26 ohm/sq and optical transmittance (at ?=550 nm) of 83% for reduced graphene oxide/silver nanowire films, and 64 ohm/sq and optical transmittance of 93.6% for monolayer graphene/silver nanowire films have been fabricated. These values are comparable to transparent conductive films based on indium tin oxide but are now able to be used in flexible electronics due to their good mechanical properties.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 23, 2014
    Applicant: Board of Regents, The University of Texas System
    Inventors: Rodney S. Ruoff, Iskandar Kholmanov
  • Publication number: 20130295367
    Abstract: Composite polymer films or layers have graphene-based nanosheets dispersed in the polymer for the reduction of gas permeability and light transmittance.
    Type: Application
    Filed: March 22, 2013
    Publication date: November 7, 2013
    Applicant: Northwestern University
    Inventors: Owen C. Compton, SonBinh T. Nguyen, Sasha Stankovich, Rodney S. Ruoff
  • Patent number: 8574681
    Abstract: A ceramic composite thin film or layer includes individual graphene oxide and/or electrically conductive graphene sheets dispersed in a ceramic (e.g. silica) matrix. The thin film or layer can be electrically conductive film or layer depending the amount of graphene sheets present. The composite films or layers are transparent, chemically inert and compatible with both glass and hydrophilic SiOx/silicon substrates. The composite film or layer can be produced by making a suspension of graphene oxide sheet fragments, introducing a silica-precursor or silica to the suspension to form a sol, depositing the sol on a substrate as thin film or layer, at least partially reducing the graphene oxide sheets to conductive graphene sheets, and thermally consolidating the thin film or layer to form a silica matrix in which the graphene oxide and/or graphene sheets are dispersed.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: November 5, 2013
    Assignee: Northwestern University
    Inventors: Rodney S. Ruoff, Sasha Stankovich, Dmitriy A. Dikin, SonBinh T. Nguyen
  • Publication number: 20130235509
    Abstract: Disclosed is a carbon material that can be useful, for example, in ultracapacitors. Also disclosed are applications and devices containing the carbon material.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 12, 2013
    Inventors: Rodney S. Ruoff, Yanwu Zhu, Meryl D. Stoller, Shanthi Murali
  • Patent number: 8470400
    Abstract: Processes for synthesizing graphene films. Graphene films may be synthesized by heating a metal or a dielectric on a substrate to a temperature between 400° C. and 1,400° C. The metal or dielectric is exposed to an organic compound thereby growing graphene from the organic compound on the metal or dielectric. The metal or dielectric is later cooled to room temperature. As a result of the above process, standalone graphene films may be synthesized with properties equivalent to exfoliated graphene from natural graphite that is scalable to size far greater than that available on silicon carbide, single crystal silicon substrates or from natural graphite.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: June 25, 2013
    Assignees: Board of Regents, The University of Texas System, Texas Instruments, Inc.
    Inventors: Luigi Colombo, Xuesong Li, Rodney S. Ruoff