Patents by Inventor Vidya Dhar SINGH

Vidya Dhar SINGH 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).

  • Engineering high-performance palladium core magnesium oxide porous shell nanocatalysts via heterogeneous gas-phase synthesis
    Patent number: 10828622
    Abstract: A novel catalyst includes a plurality of nanoparticles, each nanoparticle including a core made of a catalytic metal and a porous shell surrounding the core, made of metal oxide, the porous shell preserving a catalytic function of the core and reducing reduction of the core and coalescence of the nanoparticles.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: November 10, 2020
    Assignee: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION
    Inventors: Mukhles Ibrahim Sowwan, Cathal Cassidy, Vidya Dhar Singh
  • Controllable and reversible pH-responsive rollable 2D nano structures
    Patent number: 10279540
    Abstract: A two-dimensional nano-sheet that is foldable in response to a surrounding pH value includes a polyethyleneimine (PEI) chain taking a two-dimensional form; and a plurality of domains made of gold, attached to the PEI chain, the plurality of domains of gold forming a percolating gold film on the PEI chain.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: May 7, 2019
    Assignee: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOO
    Inventors: Jeong-Hwan Kim, Murtaza Bohra, Vidya Dhar Singh, Antony Douglas Galea, Panagiotis Grammatikopoulos, Mukhles Ibrahim Sowwan
  • ENGINEERING HIGH-PERFORMANCE PALLADIUM CORE MAGNESIUM OXIDE POROUS SHELL NANOCATALYSTS VIA HETEROGENEOUS GAS-PHASE SYNTHESIS
    Publication number: 20180193820
    Abstract: A novel catalyst includes a plurality of nanoparticles, each nanoparticle including a core made of a catalytic metal and a porous shell surrounding the core, made of metal oxide, the porous shell preserving a catalytic function of the core and reducing reduction of the core and coalescence of the nanoparticles.
    Type: Application
    Filed: June 28, 2016
    Publication date: July 12, 2018
    Applicant: Okinawa Institute of Science and Technology School Corporation
    Inventors: Mukhles Ibrahim SOWWAN, Cathal CASSIDY, Vidya Dhar SINGH
  • IN-SITU GROWTH AND CATALYTIC NANOPARTICLE DECORATION OF METAL OXIDE NANOWIRES
    Publication number: 20180178207
    Abstract: A method for manufacturing nanoparticle decorated nanowires by a vacuum deposition system having a deposition chamber and an aggregation chamber connected thereto includes: mounting a metal member in the deposition chamber; performing thermal oxidization of the metal member in the deposition chamber in an oxygen atmosphere so as to grow metal oxide nanowires on a surface of the metal member; without breaking vacuum in the vacuum deposition system, generating a vapor of a catalytic metal particles clusters in the aggregation chamber that is connected to the deposition chamber; and without breaking vacuum in the vacuum deposition system, transporting the generated catalytic metal particles clusters to the deposition chamber so as to decorate the metal oxide nanowires with catalytic metal nanoparticles made of the catalytic metal particles.
    Type: Application
    Filed: August 18, 2016
    Publication date: June 28, 2018
    Applicant: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION
    Inventors: Stephan STEINHAUER, Vidya Dhar SINGH, Mukhles Ibrahim SOWWAN
  • Metal induced nanocrystallization of amorphous semiconductor quantum dots
    Patent number: 9633842
    Abstract: A method of forming crystallized semiconductor particles includes: forming amorphous semiconductor particles in a vacuumed aggregation chamber; transporting the amorphous semiconductor particles formed in the vacuumed aggregation chamber to a vacuumed deposition chamber within which a substrate is held; and applying a vapor of a metal catalyst to the amorphous semi-conductor particles while still in transit to the substrate in the vacuumed deposition chamber to induce crystallization of at least portion of the amorphous semiconductor particles via the metal catalyst in the transit, thereby depositing the crystallized semiconductor particles with the metal catalyst attached thereto onto the substrate.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: April 25, 2017
    Assignee: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION
    Inventors: Vidya Dhar Singh, Cathal Cassidy, Mukhles Ibrahim Sowwan
  • CONTROLLABLE AND REVERSIBLE PH-RESPONSIVE ROLLABLE 2D NANO STRUCTURES
    Publication number: 20170066178
    Abstract: A two-dimensional nano-sheet that is foldable in response to a surrounding pH value includes a polyethyleneimine (PEI) chain taking a two-dimensional form; and a plurality of domains made of gold, attached to the PEI chain, the plurality of domains of gold forming a percolating gold film on the PEI chain.
    Type: Application
    Filed: February 20, 2015
    Publication date: March 9, 2017
    Applicant: OKINAWA NSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION
    Inventors: Jeong-Hwan KIM, Murtaza BOHRA, Vidya Dhar SINGH, Antony Douglas GALEA, Panagiotis GRAMMATIKOPOULOS, Mukhles Ibrahim SOWWAN