Patents by Inventor Liang-Chieh Ma

Liang-Chieh Ma 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: 20200393456
    Abstract: In one aspect, molecular sensors and methods of making molecular sensors are described herein. In some embodiments, such a sensor comprises a first layer having a dual nanohole structure and a second layer having at least one nanopore. In some embodiments, the first and second layer define a chip of the sensor. In another aspect, methods of sensing are described herein, which in some embodiments comprise (i) providing a test sample comprising complexed and/or non-complexed biomolecules; (ii) contacting the test sample with the first layer of the molecular sensor; (iii) irradiating the dual nanohole structure of the sensor with a beam of electromagnetic radiation; (iv) optically trapping the biomolecules in the dual nanohole structure and measuring a surface plasmon resonance; (v) applying an electric field across the nanopore of the sensor; and (vi) measuring change in current across the nanopore during one or more translocation events of the biomolecules.
    Type: Application
    Filed: December 11, 2018
    Publication date: December 17, 2020
    Inventors: Georgios ALEXANDRAKIS, Samir M. IQBAL, Saiful CHOWDHURY, Jon WEIDANZ, Muhammad Usman RAZA, Liang-Chieh MA
  • Patent number: 10825920
    Abstract: Energy-filtered cold electron devices use electron energy littering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: November 3, 2020
    Assignee: Board of Regents, The University of Texas System
    Inventors: Seong Jin Koh, Pradeep Bhadrachalam, Liang-Chieh Ma
  • Publication number: 20200098899
    Abstract: Energy-filtered cold electron devices use electron energy littering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Inventors: Seong Jin KOH, Pradeep BHADRACHALAM, Liang-Chieh MA
  • Patent number: 10529835
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: January 7, 2020
    Inventors: Seong Jin Koh, Pradeep Bhadrachalam, Liang-Chieh Ma
  • Publication number: 20190214488
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Seong Jin KOH, Pradeep BHADRACHALAM, Liang-Chieh MA
  • Patent number: 10276699
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: April 30, 2019
    Assignee: Board of Regents, The University of Texas System
    Inventors: Seong Jin Koh, Pradeep Bhadrachalam, Liang-Chieh Ma
  • Publication number: 20180323290
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Application
    Filed: June 27, 2018
    Publication date: November 8, 2018
    Inventors: Seong Jin KOH, Pradeep BHADRACHALAM, Liang-Chieh MA
  • Patent number: 10038084
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: July 31, 2018
    Assignee: Board of Regents, The University of Texas System
    Inventors: Seong Jin Koh, Pradeep Bhadrachalam, Liang-Chieh Ma
  • Publication number: 20170338331
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Application
    Filed: June 7, 2017
    Publication date: November 23, 2017
    Inventors: Seong Jin KOH, Pradeep BHADRACHALAM, Liang-Chieh MA
  • Patent number: 9704977
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: July 11, 2017
    Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Seong Jin Koh, Pradeep Bhadrachalam, Liang-Chieh Ma
  • Publication number: 20170012115
    Abstract: Energy-filtered cold electron devices use electron energy filtering through discrete energy levels of quantum wells or quantum dots that are formed through band bending of tunneling barrier conduction band. These devices can obtain low effective electron temperatures of less than or equal to 45K at room temperature, steep electrical current turn-on/turn-off capabilities with a steepness of less than or equal to 10 mV/decade at room temperature, subthreshold swings of less than or equal to 10 mV/decade at room temperature, and/or supply voltages of less than or equal to 0.1 V.
    Type: Application
    Filed: February 3, 2015
    Publication date: January 12, 2017
    Inventors: Seong Jin KOH, Pradeep BHADRACHALAM, Liang-Chieh MA
  • Patent number: 7465953
    Abstract: The present invention includes single electron structures and devices comprising a substrate having an upper surface, one or more dielectric layers formed on the upper surface of the substrate and having at least one exposed portion, at least one monolayer of self-assembling molecules attracted to and in contact with the at least one exposed portion of only one of the one or more dielectric layers, one or more nanoparticles attracted to and in contact with the at least one monolayer, and at least one tunneling barrier in contact with the one or more nanoparticles. Typically, the single electron structure or device formed therefrom further comprise a drain, a gate and a source to provide single electron behavior, wherein there is a defined gap between source and drain and the one or more nanoparticles is positioned between the source and drain.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: December 16, 2008
    Assignee: Board of Regents, The University of Texas System
    Inventors: Seong Jin Koh, Choong-Un Kim, Liang-Chieh Ma, Ramkumar Subramanian