Patents by Inventor Suprem R. DAS

Suprem R. DAS 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).

  • PRINTED GRAPHENE ELECTROCHEMICAL PHOSPHATE SENSORS
    Publication number: 20240192162
    Abstract: Graphene-based electrochemical sensors and uses thereof in detecting and measuring the concentration of a target substance with a sample are provided. In particular, the sensors, comprising electrodes printed from a graphene ink, can be configured to monitor phosphate ion concentration in the environment, including within soil and/or surface water.
    Type: Application
    Filed: December 28, 2023
    Publication date: June 13, 2024
    Inventors: Suprem R. Das, Rajavel Krishnamoorthy, Thiba Nagaraja
  • Low noise and high-performance field effect transistors of 2-dimensional materials and methods to fabricate the same
    Patent number: 11967629
    Abstract: A semiconductor device and methods of fabricating and using the same are provided. The semiconductor device comprises a channel region and at least a first, second, and third electrode. The channel region includes a compound having a transition metal and a chalcogen. The thickness of the channel region is about 3 to about 40 atomic layers.
    Type: Grant
    Filed: June 22, 2019
    Date of Patent: April 23, 2024
    Assignees: Kansas State University Research Foundation, Purdue Research Foundation
    Inventors: Suprem R. Das, David B. Janes, Jiseok Kwon
  • High optical transparent two-dimensional electronic conducting system and process for generating same
    Patent number: 11515057
    Abstract: Hybrid transparent conducting materials are disclosed which combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and the conductive nanostructures preferably are silver nanowires.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: November 29, 2022
    Assignee: Purdue Research Foundation
    Inventors: Muhammad Ashraful Alam, Ruiyi Chen, Suprem R. Das, David B. Janes, Changwook Jeong, Mark Lundstrom
  • NANO-INKS OF CARBON NANOMATERIALS FOR PRINTING AND COATING
    Publication number: 20220363931
    Abstract: Electrically conductive ink compositions are provided that comprise at carbon nanomaterials of one-dimensional, two-dimensional, and quasi-three-dimensional nanostructures and/or their combinations, and/or doping with elements such as nitrogen, boron, sulfur, in certain ratios. The carbon nanomaterials are selected from the group consisting of graphene and graphene oxide particles, carbon nanotubes, and graphene aerosol gels.
    Type: Application
    Filed: June 25, 2020
    Publication date: November 17, 2022
    Inventors: Suprem R. Das, Wenjun Xiang, Anand P.S. Gaur
  • LOW NOISE AND HIGH-PERFORMANCE FIELD EFFECT TRANSISTORS OF 2-DIMENSIONAL MATERIALS AND METHODS TO FABRICATE THE SAME
    Publication number: 20210280685
    Abstract: A semiconductor device and methods of fabricating and using the same are provided. The semiconductor device comprises a channel region and at least a first, second, and third electrode. The channel region includes a compound having a transition metal and a chalcogen. The thickness of the channel region is about 3 to about 40 atomic layers.
    Type: Application
    Filed: June 22, 2019
    Publication date: September 9, 2021
    Inventors: Suprem R. Das, David B. Janes, Jiseok Kwon
  • HIGH OPTICAL TRANSPARENT TWO-DIMENSIONAL ELECTRONIC CONDUCTING SYSTEM AND PROCESS FOR GENERATING SAME
    Publication number: 20210118588
    Abstract: Hybrid transparent conducting materials are disclosed which combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and the conductive nanostructures preferably are silver nanowires.
    Type: Application
    Filed: October 5, 2020
    Publication date: April 22, 2021
    Inventors: Muhammad Ashraful ALAM, Ruiyi CHEN, Suprem R. DAS, David B. JANES, Changwook JEONG, Mark LUNDSTROM
  • High optical transparent two-dimensional electronic conducting system and process for generating same
    Patent number: 10839974
    Abstract: Hybrid transparent conducting materials are disclosed with combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and conductive nanostructures preferably are silver nanowires.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: November 17, 2020
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Muhammad Ashraful Alam, Ruiyi Chen, Suprem R. Das, David B. Janes, Changwook Jeong, Mark Lundstrom
  • HIGH OPTICAL TRANSPARENT TWO-DIMENSIONAL ELECTRONIC CONDUCTING SYSTEM AND PROCESS FOR GENERATING SAME
    Publication number: 20200105434
    Abstract: Hybrid transparent conducting materials are disclosed with combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and conductive nanostructures preferably are silver nanowires.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 2, 2020
    Inventors: Muhammad Ashraful ALAM, Ruiyi CHEN, Suprem R. DAS, David B. JANES, Changwook JEONG, Mark LUNDSTROM
  • High optical transparent two-dimensional electronic conducting system and process for generating same
    Patent number: 10468151
    Abstract: Hybrid transparent conducting materials are disclosed with combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and conductive nanostructures preferably are silver nanowires.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: November 5, 2019
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Muhammad Ashraful Alam, Ruiyi Chen, Suprem R. Das, David B. Janes, Changwook Jeong, Mark Lundstrom
  • HIGH OPTICAL TRANSPARENT TWO-DIMENSIONAL ELECTRONIC CONDUCTING SYSTEM AND PROCESS FOR GENERATING SAME
    Publication number: 20170098486
    Abstract: Hybrid transparent conducting materials are disclosed with combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and conductive nanostructures preferably are silver nanowires.
    Type: Application
    Filed: October 24, 2016
    Publication date: April 6, 2017
    Inventors: Muhammad Ashraful ALAM, Ruiyi CHEN, Suprem R. DAS, David B. JANES, Changwook JEONG
  • HIGH OPTICAL TRANSPARENT TWO-DIMENSIONAL ELECTRONIC CONDUCTING SYSTEM AND PROCESS FOR GENERATING SAME
    Publication number: 20140014171
    Abstract: Hybrid transparent conducting materials are disclosed with combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and conductive nanostructures preferably are silver nanowires.
    Type: Application
    Filed: June 17, 2013
    Publication date: January 16, 2014
    Applicant: PURDUE RESEARCH FOUNDATION
    Inventors: Muhammad Ashraful ALAM, Ruiyi CHEN, Suprem R. DAS, David B. JANES, Changwook JEONG