Patents by Inventor Paul E. Sheehan

Paul E. Sheehan 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: 10762925
    Abstract: A patterned magnetic graphene made from the steps of transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content by using an electron beam from a scanning electron microscope to selectively remove hydrogen, wherein the step of selectively removing hydrogen occurs under a vacuum, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: September 1, 2020
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
  • Patent number: 10525421
    Abstract: An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: January 7, 2020
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Manoj K. Kolel-Veetil, Paul E. Sheehan
  • Publication number: 20190271910
    Abstract: The present invention provides a method for creating patterns, with features down to the nanometer scale, in phase change materials using a heated probe. The heated probe contacts the phase change material thereby inducing a local phase change, resulting in a dramatic contrast in property—including electrical resistance, optical reflectance, and volume—relative to the uncontacted regions of the phase change material. The phase change material can be converted back to its original phase (i.e. the patterns can be erased) by appropriate thermal cycling.
    Type: Application
    Filed: May 22, 2019
    Publication date: September 5, 2019
    Inventors: Laura Ruppalt, Woo K. Lee, Paul E. Sheehan, Adrian Podpirka
  • Patent number: 10392248
    Abstract: A method for dry graphene transfer comprising growing graphene on a growth substrate, chemically modifying a transfer substrate to enhance its adhesion to graphene, contacting the graphene on the growth substrate with the transfer substrate and transfer printing; and separating the transfer substrate with attached graphene from the growth substrate. The growth substrate may be copper foil. The transfer substrate may be a polymer, such as polystyrene or polyethylene, or an inorganic substrate.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: August 27, 2019
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Evgeniya H. Lock, Mira Baraket, Scott G. Walton, Matthew Laskoski, Paul E. Sheehan, Shawn P. Mulvaney, Daniel R. Hines
  • Publication number: 20190088279
    Abstract: A patterned magnetic graphene made from the steps of transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content by using an electron beam from a scanning electron microscope to selectively remove hydrogen, wherein the step of selectively removing hydrogen occurs under a vacuum, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.
    Type: Application
    Filed: October 10, 2018
    Publication date: March 21, 2019
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
  • Patent number: 10134434
    Abstract: A method of making magnetic graphene comprising transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 20, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
  • Publication number: 20180305202
    Abstract: A method for dry graphene transfer comprising growing graphene on a growth substrate, chemically modifying a transfer substrate to enhance its adhesion to graphene, contacting the graphene on the growth substrate with the transfer substrate and transfer printing; and separating the transfer substrate with attached graphene from the growth substrate. The growth substrate may be copper foil. The transfer substrate may be a polymer, such as polystyrene or polyethylene, or an inorganic substrate.
    Type: Application
    Filed: June 26, 2018
    Publication date: October 25, 2018
    Inventors: Evgeniya H. Lock, Mira Baraket, Scott G. Walton, Matthew Laskoski, Paul E. Sheehan, Shawn P. Mulvaney, Daniel R. Hines
  • Patent number: 9895870
    Abstract: A method of transferring functionalized graphene comprising the steps of providing graphene on a first substrate, functionalizing the graphene and forming functionalized graphene on the first substrate, delaminating the functionalized graphene from the first substrate, and applying the functionalized graphene to a second substrate.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: February 20, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Keith E. Whitener, Woo K. Lee, Jeremy T. Robinson, Nabil D. Bassim, Rhonda Michele Stroud, Paul E. Sheehan
  • Publication number: 20170259554
    Abstract: A method of transferring functionalized graphene comprising the steps of providing graphene on a first substrate, functionalizing the graphene and forming functionalized graphene on the first substrate, delaminating the functionalized graphene from the first substrate, and applying the functionalized graphene to a second substrate.
    Type: Application
    Filed: February 22, 2017
    Publication date: September 14, 2017
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Keith E. Whitener, Woo K. Lee, Jeremy T. Robinson, Nabil D. Bassim, Rhonda Michele Stroud, Paul E. Sheehan
  • Publication number: 20170242053
    Abstract: The present invention provides a method for creating patterns, with features down to the nanometer scale, in phase change materials using a heated probe. The heated probe contacts the phase change material thereby inducing a local phase change, resulting in a dramatic contrast in property—including electrical resistance, optical reflectance, and volume—relative to the uncontacted regions of the phase change material. The phase change material can be converted back to its original phase (i.e. the patterns can be erased) by appropriate thermal cycling.
    Type: Application
    Filed: February 13, 2017
    Publication date: August 24, 2017
    Inventors: Laura Ruppalt, Woo K. Lee, Paul E. Sheehan, Adrian Podpirka
  • Publication number: 20160140992
    Abstract: A method of making magnetic graphene comprising transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.
    Type: Application
    Filed: October 20, 2015
    Publication date: May 19, 2016
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Woo K. Lee, Keith E. Whitener, Paul E. Sheehan
  • Publication number: 20120244358
    Abstract: A method for dry graphene transfer comprising growing graphene on a growth substrate, chemically modifying a transfer substrate to enhance its adhesion to graphene, contacting the graphene on the growth substrate with the transfer substrate and transfer printing; and separating the transfer substrate with attached graphene from the growth substrate. The growth substrate may be copper foil. The transfer substrate may be a polymer, such as polystyrene or polyethylene, or an inorganic substrate. Also disclosed is the related composite material made by this process.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 27, 2012
    Inventors: Evgeniya H. Lock, Scott G. Walton, Mira Baraket, Matthew Laskoski, Paul E. Sheehan, Shawn P. Mulvaney, Daniel R. Hines
  • Publication number: 20090255465
    Abstract: The present invention describes an apparatus for nanolithography and a process for thermally controlling the deposition of a solid organic “ink” from the tip of an atomic force microscope to a substrate. The invention may be used to turn deposition of the ink to the substrate on or off by either raising its temperature above or lowing its temperature below the ink's melting temperature. This process may be useful as it allows ink deposition to be turned on and off and the deposition rate to change without the tip breaking contact with the substrate. The same tip can then be used for imaging purposes without fear of contamination. This invention can allow ink to be deposited in a vacuum enclosure, and can also allow for greater spatial resolution as the inks used have lower surface mobilities once cooled than those used in other nanolithography methods.
    Type: Application
    Filed: June 1, 2009
    Publication date: October 15, 2009
    Inventors: Paul E. Sheehan, Lloyd J. Whitman, William P. King
  • Patent number: 7541062
    Abstract: The present invention describes an apparatus for nanolithography and a process for thermally controlling the deposition of a solid organic “ink” from the tip of an atomic force microscope to a substrate. The invention may be used to turn deposition of the ink to the substrate on or off by either raising its temperature above or lowing its temperature below the ink's melting temperature. This process may be useful as it allows ink deposition to be turned on and off and the deposition rate to change without the tip breaking contact with the substrate. The same tip can then be used for imaging purposes without fear of contamination. This invention can allow ink to be deposited in a vacuum enclosure, and can also allow for greater spatial resolution as the inks used have lower surface mobilities once cooled than those used in other nanolithography methods.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: June 2, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Paul E. Sheehan, Lloyd J. Whitman, William P. King