Patents by Inventor Peijun Ma

Peijun 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: 20230323336
    Abstract: In one example embodiment, methods of generating a single prokaryotic cell cDNA library include barcoding RNAs from different prokaryotic cells individually, allowing cell identity of each RNA to be retained in a single sequencing library. In one example embodiment, methods include, prior to generating a cDNA library, degrading rRNA and DNA in each cell of a set of fixed and permeabilized cells. In one example embodiment, methods include converting mRNA in each fixed and permeabilized cell into cDNA labeled with a cell-specific first and second barcode combination and a unique molecular identifier (UMI). In one example embodiment, methods include amplifying labeled cDNA and preparing a sequencing library of amplified labeled cDNA.
    Type: Application
    Filed: August 11, 2022
    Publication date: October 12, 2023
    Inventors: Deborah Hung, Peijun Ma, Haley Amemiya
  • Patent number: 11557682
    Abstract: A low turn-on voltage GaN diode having an anode metal with a consistent crystal orientation and a preparation method thereof. The low turn-on voltage GaN diode having an anode metal with a consistent crystal orientation provided by the present disclosure includes a substrate layer, a GaN buffer layer, a GaN channel layer and an AlGaN barrier layer, which are arranged in sequence from bottom to top; a cathode arranged on the AlGaN barrier layer; a groove arranged in the GaN channel layer and the AlGaN barrier layer, and an anode provided on a bottom and a side wall of the groove and part of the AlGaN barrier layer; a dielectric layer provided on an uncovered portion of the AlGaN barrier layer; wherein, a contact portion of the anode with the groove and the AlGaN barrier layer is W or Mo metal with a crystal orientation of <100>.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: January 17, 2023
    Assignee: XIDIAN UNIVERSITY
    Inventors: Jing Ning, Chi Zhang, Jincheng Zhang, Boyu Wang, Dong Wang, Peijun Ma, Yue Hao
  • Publication number: 20220243264
    Abstract: Described in certain example embodiments herein are highly sensitive systems and methods of amplifying RNA in a sample. In certain example embodiments, the method includes reverse transcribing one or more strands of template RNA in the sample into a first cDNA strand in the presence of a first primer comprising a unique molecular identifier (UMI), a second primer comprising a T7 promoter sequence, and a reverse transcriptase enzyme; synthesizing a second cDNA strand in the presence of a DNA polymerase to generate double-stranded cDNA; and transcribing the double-stranded cDNA in the presence of a T7 RNA polymerase to generate amplified RNA. The systems and methods described herein allow for amplification from very small amounts of template RNA, in some embodiments, as little as 0.5 picograms.
    Type: Application
    Filed: November 23, 2021
    Publication date: August 4, 2022
    Applicants: THE BROAD INSTITUTE, INC., THE GENERAL HOSPITAL CORPORATION
    Inventors: Deborah Hung, Peijun Ma
  • Publication number: 20210359121
    Abstract: A high electron mobility transistor (HEMT) device is provided. The HEMT device includes a substrate layer, a buffer layer, a barrier layer, and a metallic electrode layer sequentially arranged in that order from bottom to top. The metallic electrode layer includes a source electrode, a gate electrode and a drain electrode sequentially arranged in that order from left to right. The barrier layer may include m number of fluorine-doped regions arranged in sequence, where m is a positive integer and m?2. The HEMT device can realize a relative stability of transconductance in a large range of a gate-source-bias through mutual compensation of transconductances in the fluorine-doped regions with different fluorine-ion concentrations of the barrier layer under the gate electrode, and the HEMT device has a good linearity without the need of excessive adjustments of material structure and device.
    Type: Application
    Filed: June 23, 2021
    Publication date: November 18, 2021
    Inventors: Xuefeng Zheng, Xiaohua Ma, Zhenling Tang, Peijun Ma, Ming Du, Minhan Mi, Yunlong He, Yang Lu, Xiaohu Wang, Chong Wang, Yue Hao
  • Patent number: 11133185
    Abstract: The present invention discloses an epitaxial lift-off process of graphene-based gallium nitride (GaN), and principally solves the existing problems about complex lift-off technique, high cost, and poor quality of lift-off GaN films. The invention is achieved by: first, growing graphene on a well-polished copper foil by CVD method; then, transferring a plurality of layers of graphene onto a sapphire substrate; next, growing GaN epitaxial layer on the sapphire substrate with a plurality of graphene layers transferred by the metal organic chemical vapor deposition (MOCVD) method; finally, lifting off and transferring the GaN epitaxial layer onto a target substrate with a thermal release tape. With graphene, the present invention relieves the stress generated by the lattice mismatch between substrate and epitaxial layer; moreover, the present invention readily lifts off and transfers the epitaxial layer to the target substrate by means of weak Van der Waals forces between epitaxial layer and graphene.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: September 28, 2021
    Assignee: Xidian University
    Inventors: Jing Ning, Jincheng Zhang, Dong Wang, Yanqing Jia, Chaochao Yan, Boyu Wang, Peijun Ma, Yue Hao
  • Publication number: 20210230675
    Abstract: The present disclosure relates to compositions, methods, and kits for rapid phenotypic detection of antibiotic resistance/susceptibility.
    Type: Application
    Filed: August 26, 2019
    Publication date: July 29, 2021
    Applicants: THE BROAD INSTITUTE, INC., THE GENERAL HOSPITAL CORPORATION
    Inventors: Deborah Hung, Roby Bhattacharyya, Jonathan Livny, Peijun Ma
  • Publication number: 20200402796
    Abstract: The present invention discloses an epitaxial lift-off process of graphene-based gallium nitride (GaN), and principally solves the existing problems about complex lift-off technique, high cost, and poor quality of lift-off GaN films. The invention is achieved by: first, growing graphene on a well-polished copper foil by CVD method; then, transferring a plurality of layers of graphene onto a sapphire substrate; next, growing GaN epitaxial layer on the sapphire substrate with a plurality of graphene layers transferred by the metal organic chemical vapor deposition (MOCVD) method; finally, lifting off and transferring the GaN epitaxial layer onto a target substrate with a thermal release tape. With graphene, the present invention relieves the stress generated by the lattice mismatch between substrate and epitaxial layer; moreover, the present invention readily lifts off and transfers the epitaxial layer to the target substrate by means of weak Van der Waals forces between epitaxial layer and graphene.
    Type: Application
    Filed: June 18, 2020
    Publication date: December 24, 2020
    Inventors: Jing Ning, Jincheng Zhang, Dong Wang, Yanqing Jia, Chaochao Yan, Boyu Wang, Peijun Ma, Yue Hao