Patents by Inventor Rhonda M. Stroud

Rhonda M. Stroud 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: 20230332044
    Abstract: Methods of fabricating nanocrystals are disclosed. Such methods may include providing copper sulfide core nanocrystals and providing a lead precursor. Moreover, the copper sulfide core nanocrystals may be reacted with the lead precursor to generate copper doped lead sulfide nanocrystals. Related nanocrystals and optoelectronic devices are also disclosed.
    Type: Application
    Filed: May 4, 2023
    Publication date: October 19, 2023
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Patrick Y. Yee, Sarah F. Brittman, Paul D. Cunningham, Janice E. Boercker, Katherine D. Burgess, Rhonda M. Stroud, Steven C. Erwin
  • Patent number: 11732186
    Abstract: A process for synthesizing Cu2-xS/PbS core/shell nanocrystals. Pb-oleate is mixed with 1-octadecene and heated to 60° C. Cu2-xS core solution and bis(trimethylsilyl)sulfide stock solution are added and the mixture is stirred at 60° C. for 6 minutes to form the PbS shell around the Cu2-xS nanocrystal cores. The flask is cooled and acetonitrile and toluene is added and the mixture is centrifuged to precipitate and remove the Cu2-xS/PbS core/shell nanocrystals from the reaction mixture. The reaction also produces homogeneously nucleated PbS nanocrystals, which are removed from the Cu2-xS/PbS core/shell reaction mixture via size-selective precipitation. By tailoring the amounts of Pb-oleate and bis(trimethylsilyl)sulfide stock solution in the reaction vessel, while maintaining their molar ratio of 1.5:1 and the number of Cu2-xS cores in the reaction, Cu2-xS/PbS core/shell nanocrystals having a predetermined shell thickness of PbS, and thus a predetermined level of chemical stability, can be obtained.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: August 22, 2023
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Janice E. Boercker, Sarah F. Brittman, Joseph G. Tischler, Patrick Y. Yee, Chase T. Ellis, Paul D. Cunningham, Rhonda M. Stroud, Michael H. Stewart, Steven C. Erwin
  • Patent number: 11325086
    Abstract: A method of making molecularly doped nanodiamond. A versatile method for doping diamond by adding dopants into a carbon precursor and producing diamond at high pressure, high temperature conditions. Molecularly doped nanodiamonds that have direct incorporation of dopants and therefore without the need for ion implantation. Molecularly-doped diamonds that have fewer lattice defects than those made with ion implantation.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: May 10, 2022
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rhonda M. Stroud, Matthew J. Crane, Peter J. Pauzauskie
  • Publication number: 20220048002
    Abstract: A method of making molecularly doped nanodiamond. A versatile method for doping diamond by adding dopants into a carbon precursor and producing diamond at high pressure, high temperature conditions. Molecularly doped nanodiamonds that have direct incorporation of dopants and therefore without the need for ion implantation. Molecularly-doped diamonds that have fewer lattice defects than those made with ion implantation.
    Type: Application
    Filed: October 28, 2021
    Publication date: February 17, 2022
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rhonda M. Stroud, Matthew J. Crane, Peter J. Pauzauskie
  • Publication number: 20210332291
    Abstract: A process for synthesizing Cu2-xS/PbS core/shell nanocrystals. Pb-oleate is mixed with 1-octadecene and heated to 60° C. Cu2-xS core solution and bis(trimethylsilyl)sulfide stock solution are added and the mixture is stirred at 60° C. for 6 minutes to form the PbS shell around the Cu2-xS nanocrystal cores. The flask is cooled and acetonitrile and toluene is added and the mixture is centrifuged to precipitate and remove the Cu2-xS/PbS core/shell nanocrystals from the reaction mixture. The reaction also produces homogeneously nucleated PbS nanocrystals, which are removed from the Cu2-xS/PbS core/shell reaction mixture via size-selective precipitation. By tailoring the amounts of Pb-oleate and bis(trimethylsilyl)sulfide stock solution in the reaction vessel, while maintaining their molar ratio of 1.5:1 and the number of Cu2-xS cores in the reaction, Cu2-xS/PbS core/shell nanocrystals having a predetermined shell thickness of PbS, and thus a predetermined level of chemical stability, can be obtained.
    Type: Application
    Filed: April 23, 2021
    Publication date: October 28, 2021
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Janice E. Boercker, Sarah F. Brittman, Joseph G. Tischler, Patrick Y. Yee, Chase T. Ellis, Paul D. Cunningham, Rhonda M. Stroud, Michael H. Stewart, Steven C. Erwin
  • Publication number: 20190282984
    Abstract: A method of making molecularly doped nanodiamond. A versatile method for doping diamond by adding dopants into a carbon precursor and producing diamond at high pressure, high temperature conditions. Molecularly doped nanodiamonds that have direct incorporation of dopants and therefore without the need for ion implantation. Molecularly-doped diamonds that have fewer lattice defects than those made with ion implantation.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 19, 2019
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rhonda M. Stroud, Matthew J. Crane, Peter J. Pauzauskie
  • Patent number: 7238729
    Abstract: This disclosure describes the first viable non-enzyme protein encapsulated within an aerogel. In this, a large excess of cyt c is added to a commercial buffered Au sol solution ( ) which results in the formation of a gold˜protein-protein superstructure in the absence of separation techniques which destroy the superstructure. The gold˜protein-protein superstructure is then nanoglued into a silica framework during the sol to gel transition. To form the gel, the Au˜cyt. c superstructure in buffered medium is added to a silica sol and the composite gels are washed with acetone followed by liquid carbon dioxide and then supercritically dried to form the aerogel. The biocomposite aerogels have a multiplicity of applications particularly in the realm of sensing and energy transformation.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: July 3, 2007
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Debra R. Rolison, Jean M. Wallace, Jeremy J. Pietron, Jane K. Rice, Rhonda M. Stroud
  • Patent number: 6824776
    Abstract: This disclosure describes the first viable non-enzyme protein encapsulated within an aerogel. In this, a large excess of cyt. c is added to a commercial buffered Au sot solution ( ) which results in the formation of a gold˜protein-protein superstructure in the absence of separation techniques which destroy the superstructure. The gold˜protein-protein superstructure is then nanoglued into a silica framework during the sol to gel transition. To form the gel, the Au-cyt. c superstructure in buffered medium is added to a silica sol and the composite gels are washed with acetone followed by liquid carbon dioxide and then supercritically dried to form the aerogel. The biocomposite aerogels have a multiplicity of applications particularly in the realm of sensing and energy transformation.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: November 30, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Debra R. Rolison, Jean M. Wallace, Jeremy J. Pietron, Jane K. Rice, Rhonda M. Stroud
  • Publication number: 20040209338
    Abstract: This disclosure describes the first viable non-enzyme protein encapsulated within an aerogel. In this, a large excess of cyt. c is added to a commercial buffered Au sol solution ( ) which results in the formation of a gold˜protein-protein superstructure in the absence of separation techniques which destroy the superstructure.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Inventors: Debra R. Rolison, Jean M. Wallace, Jeremy J. Pietron, Jane K. Rice, Rhonda M. Stroud
  • Patent number: 6695986
    Abstract: An electrically conductive composite is provided having a mesoporous architecture that improves the accessibility of a nanoscopic catalyst, supported on conductive carbon, to a mass-transported reactant, or substrate, thereby leading to enhanced catalytic activity. In particular, the composite is useful for a new class of fuel-cell electrode architectures based on a composite aerogel that improves the accessibility of a carbon-supported Pt electrocatalyst to methanol (MeOH), leading to higher MeOH oxidation activities than observed at the native carbon supported Pt electrocatalyst. The composite comprises a nanoscopic Pt electrocatalyst, a carbon black electron-conducting support, and a silica aerogel.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: February 24, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Debra R. Rolison, Michele L. Anderson, Rhonda M. Stroud