Patents by Inventor Xiangfeng Duan

Xiangfeng Duan 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: 20220246948
    Abstract: Provided herein are catalyst materials comprising a catalyst support; and PtM? nanowires affixed to the catalyst support, wherein the PtM? nanowires include single atomic species of M? at exterior surfaces of the PtM? nanowires, and M? represents at least one metal, e.g., a metal different from Pt. Also disclosed are manufacturing methods comprising: providing initial MM? nanowires having an initial molar ratio of M:M?, wherein M is a noble metal, and M? is a metal different from M; subjecting the initial MM? nanowires to electrochemical dealloying to partially remove M? and form partially dealloyed MM? nanowires having a subsequent molar ratio of M:M?, wherein the subsequent molar ratio of M:M? is greater than the initial molar ratio of M:M?; and affixing the partially dealloyed MM? nanowires to a catalyst support.
    Type: Application
    Filed: April 21, 2020
    Publication date: August 4, 2022
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yu HUANG, Chengzhang WAN, Mufan LI
  • Publication number: 20220205119
    Abstract: Electrochemical catalysts for the reduction of CO2 to hydrocarbons, such as ethylene, include Cu nanowires, wherein the Cu nanowires include a stepped surface.
    Type: Application
    Filed: December 28, 2021
    Publication date: June 30, 2022
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yu HUANG, Chungsuk CHOI, Xiangfeng DUAN
  • Patent number: 11348740
    Abstract: The present disclosure provides supercapacitors that may avoid shortcomings of current energy storage technology. Provided herein are materials and fabrication processes of such supercapacitors. In some embodiments, an electrochemical system comprising a first electrode, a second electrode, wherein at least one of the first electrode and the second electrode comprises a three dimensional porous reduced graphene oxide framework.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: May 31, 2022
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yu Huang, Benjamin Papandrea, Xu Xu
  • Publication number: 20220151770
    Abstract: In some embodiments, a suction-based tool for positioning an intraocular implant includes a tool body defining an internal channel; a suction extension extending through the internal channel; and a suction attachment connected to an end of the suction extension. In additional embodiments, a suction-based tool for positioning an intraocular implant includes: a tool body including a tool tip; a joint at an end of the tool tip; and a suction attachment connected to the tool tip via the joint.
    Type: Application
    Filed: November 16, 2021
    Publication date: May 19, 2022
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yu HUANG, Chao MA
  • Publication number: 20220144714
    Abstract: A ceramic aerogel includes a porous framework including interconnected double-paned wall structures of a ceramic material, wherein each double-paned wall structure includes a pair of walls spaced apart by a gap.
    Type: Application
    Filed: January 23, 2020
    Publication date: May 12, 2022
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yu Huang, Xiang Xu
  • Publication number: 20210399312
    Abstract: An electrode material includes: (1) a catalyst support; and (2) PtNiN-M nanostructures affixed to the catalyst support, wherein N is a transition metal selected from Group 9 and Group 11 of the Periodic Table, and M is a transition metal selected from Group 5 and Group 6 of the Periodic Table.
    Type: Application
    Filed: October 30, 2019
    Publication date: December 23, 2021
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yu Huang, Xiangfeng Duan, Zipeng Zhao
  • Publication number: 20210351407
    Abstract: A lithium-ion battery includes: 1) an anode; 2) a cathode; and 3) an electrolyte disposed between the anode and the cathode and including lithium ions. The anode includes a graphene framework film including interconnected graphene sheets, and the graphene framework film has a specific surface area of 600 m2 g?1 or more.
    Type: Application
    Filed: February 26, 2021
    Publication date: November 11, 2021
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yuxi Xu
  • Publication number: 20210242468
    Abstract: A method of forming an electrode material includes: (1) loading an electrochemically active material onto graphene sheets; (2) combining the electrochemically active material-loaded graphene sheets with holey graphene oxide sheets to form a mixture; and (3) treating the mixture under reducing conditions to form a composite including a graphene framework loaded with the electrochemically active material.
    Type: Application
    Filed: April 23, 2021
    Publication date: August 5, 2021
    Applicant: The Regents of the University of California
    Inventors: Xiangfeng Duan, Yu Huang, Hongtao Sun
  • Patent number: 11011755
    Abstract: A method of forming an electrode material includes: (1) loading an electrochemically active material onto graphene sheets; (2) combining the electrochemically active material-loaded graphene sheets with holey graphene oxide sheets to form a mixture; and (3) treating the mixture under reducing conditions to form a composite including a graphene framework loaded with the electrochemically active material.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: May 18, 2021
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yu Huang, Hongtao Sun
  • Patent number: 10971727
    Abstract: A lithium-ion battery includes: 1) an anode; 2) a cathode; and 3) an electrolyte disposed between the anode and the cathode and including lithium ions. The anode includes a graphene framework film including interconnected graphene sheets, and the graphene framework film has a specific surface area of 600 m2 g?1 or more.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: April 6, 2021
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yuxi Xu
  • Patent number: 10901243
    Abstract: Methods and apparatus for providing all-optically generated, on-chip propagated and high-efficiency tunable plasmons are described. The plasmon generating apparatus includes a graphene based silicon nitride waveguide (GSiNW) utilizing ‘C+L’ band light sources and detectors that take advantage of the surface 2nd nonlinearity on graphene. The optical generation is accomplished via one or more optical communication lasers through the difference-frequency generation process. The THz frequency and intensity is tunable via an external gate voltage. Using such a device the optical to THz conversion may be made at least an order of magnitude more efficient than prior THz sources, and can be used to make chip-scale room-temperature THz sources, switches, modulators and detectors based on graphene.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: January 26, 2021
    Assignee: The Regents of the University of California
    Inventors: Chee Wei Wong, Baicheng Yao, Yuan Liu, Xiangfeng Duan
  • Publication number: 20210020744
    Abstract: An electronic or optoelectronic device includes: (1) a layer of a first material; and (2) a layer of a second material disposed on the layer of the first material, wherein the first material is different from the second material, and the layer of the first material is spaced from the layer of the second material by a gap.
    Type: Application
    Filed: March 19, 2019
    Publication date: January 21, 2021
    Inventors: Xiangfeng Duan, Yu HUANG, Yuan Liu
  • Publication number: 20200294729
    Abstract: The present disclosure provides supercapacitors that may avoid shortcomings of current energy storage technology. Provided herein are materials and fabrication processes of such supercapacitors. In some embodiments, an electrochemical system comprising a first electrode, a second electrode, wherein at least one of the first electrode and the second electrode comprises a three dimensional porous reduced graphene oxide framework.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng DUAN, Yu HUANG, Benjamin PAPANDREA, Xu XU
  • Publication number: 20200249160
    Abstract: A sensor includes a nanostructure, which includes a domain of a first material and a domain of a second material that covers the domain of the first material. The first material is a plasmonic material, and the second material is a non-linear optical material.
    Type: Application
    Filed: November 17, 2016
    Publication date: August 6, 2020
    Inventors: Xiangfeng DUAN, Anxiang YIN
  • Patent number: 10714272
    Abstract: The present disclosure provides supercapacitors that may avoid shortcomings of current energy storage technology. Provided herein are materials and fabrication processes of such supercapacitors. In some embodiments, an electrochemical system comprising a first electrode, a second electrode, wherein at least one of the first electrode and the second electrode comprises a three dimensional porous reduced graphene oxide framework.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: July 14, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yu Huang, Benjamin Papandrea, Xu Xu
  • Patent number: 10692660
    Abstract: An electrochemical capacitor includes a pair of electrodes and an electrolyte disposed between the pair of electrodes. At least a first electrode of the pair of electrodes includes a graphene framework film, and the graphene framework film includes interconnected graphene sheets with nanopores formed in the graphene sheets.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: June 23, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yuxi Xu
  • Patent number: 10689537
    Abstract: A method of forming a graphene-based material includes: (1) treating a mixture including an etchant and graphene oxide sheets to yield formation of holey graphene oxide sheets; (2) dispersing the holey graphene oxide sheets in a re-dispersal solvent to yield a holey graphene oxide dispersion including the holey graphene oxide sheets; and (3) treating the holey graphene oxide dispersion under reducing conditions to yield self-assembly of the holey graphene oxide sheets into a graphene-based material.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: June 23, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Yuxi Xu, Yu Huang
  • Patent number: 10370774
    Abstract: A process of growing graphene includes: (1) providing a metal substrate; (2) annealing the metal substrate up to a growth temperature for an annealing time period and in the presence of a non-reducing gas; and (3) introducing a gas mixture to grow graphene over the metal substrate. The gas mixture includes a first gas and a second gas that is a carbon-containing precursor, a molar ratio of the first gas and the second gas is at least 100, and introducing the gas mixture is carried out at a pressure up to 100 mbar.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: August 6, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Xiangfeng Duan, Hailong Zhou
  • Publication number: 20190226120
    Abstract: A manufacturing method includes: (1) providing M-M? nanowires, wherein M? is at least one sacrificial metal different from M; and (2) subjecting the M-M? nanowires to electrochemical de-alloying to form jagged M nanowires.
    Type: Application
    Filed: August 29, 2017
    Publication date: July 25, 2019
    Inventors: Xiangfeng DUAN, Yu HUANG, Mufan LI
  • Publication number: 20190190033
    Abstract: An electrode material includes a catalyst support and Pt—Ni-M-M? nanostructures affixed to the catalyst support. M is a transition metal different from Pt and Ni, and M? is a transition metal different from Pt, Ni, and M.
    Type: Application
    Filed: August 3, 2017
    Publication date: June 20, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yu HUANG, Zipeng ZHAO, Xiangfeng DUAN