Patents by Inventor Rajratan Basu

Rajratan Basu 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).

  • Utilizing 2D monolayer WSe2 nanosheets as the planar-alignment agent in an electro-optical liquid crystal device to improve its optical transmission
    Patent number: 11619847
    Abstract: An electro-optical liquid crystal cell comprising a first substrate, a first layer of indium tin oxide (ITO) on the first substrate, a first layer of WSe2 on the first layer of ITO on the first substrate, and a layer of liquid crystal on the first layer of WSe2 on the first layer of ITO on the first substrate. Furthermore, the electro-optical liquid crystal cell can comprise a second layer of WSe2, a second layer of ITO, and a second substrate. This WSe2 cell exhibits the required electro-optic effect needed for a liquid crystal display. This WSe2 cell exhibits high optical transmission.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: April 4, 2023
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Rajratan Basu
  • Utilizing Vertically Aligned Carbon Nanotube Arrays as the Homeotropic Alignment Agent in an electro-optic liquid crystal device
    Publication number: 20220291552
    Abstract: An electro-optical liquid crystal cell comprising a first substrate, a first layer of chromium (Cr), a first layer of vertically aligned carbon nanotubes (VA-CNT) capped with nickel nanoparticles, and a layer of liquid crystal. Furthermore, the electro-optical liquid crystal cell can comprise a second layer of VA-CNT capped with nickel nanoparticles, a second layer of Cr, and a second substrate. This electro-optic VA-CNT-based liquid crystal cell exhibits the required electro-optic effect needed for a liquid crystal display.
    Type: Application
    Filed: November 15, 2021
    Publication date: September 15, 2022
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Rajratan Basu
  • Concurrent utilization of monolayer graphene as the planar-alignment layers and the transparent conductive electrodes in electro-optic liquid crystal devices
    Patent number: 11294253
    Abstract: A graphene and liquid crystal device comprising a substrate, a layer of graphene on the substrate, and a layer of liquid crystal on the layer of graphene. A graphene and liquid crystal device wherein the layer of graphene is an alignment layer and an electrode for a liquid crystal device.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: April 5, 2022
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rajratan Basu, Daniel Kinnamon, Christopher M. Spillmann, Jakub Kolacz, Jesse A. Frantz, Jason D. Myers
  • Utilizing 2D Monolayer WSe2 Nanosheets as the Planar-Alignment Agent in an electro-optical liquid crystal device to improve its optical transmission
    Publication number: 20220043311
    Abstract: An electro-optical liquid crystal cell comprising a first substrate, a first layer of indium tin oxide (ITO) on the first substrate, a first layer of WSe2 on the first layer of ITO on the first substrate, and a layer of liquid crystal on the first layer of WSe2 on the first layer of ITO on the first substrate. Furthermore, the electro-optical liquid crystal cell can comprise a second layer of WSe2, a second layer of ITO, and a second substrate. This WSe2 cell exhibits the required electro-optic effect needed for a liquid crystal display. This WSe2 cell exhibits high optical transmission.
    Type: Application
    Filed: June 4, 2021
    Publication date: February 10, 2022
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Rajratan Basu
  • Liquid crystal device employing graphene as the planar-alignment agent and electrode
    Patent number: 11131898
    Abstract: A graphene and liquid crystal device comprising a substrate, a layer of graphene on the substrate, and a layer of liquid crystal on the layer of graphene. A graphene and liquid crystal device wherein the layer of graphene is an alignment layer and an electrode for a liquid crystal device.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: September 28, 2021
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rajratan Basu, Daniel Kinnamon, Christopher M. Spillmann, Jakub Kolacz, Jesse A. Frantz, Jason D. Myers
  • Tuning the polar anchoring strength by doping graphene flakes and resulting accelerated electro-optic switching in liquid crystal devices
    Patent number: 11106064
    Abstract: A method of achieving higher polar anchoring strength of liquid crystal (LC) using monolayer graphene flakes in an LC device and attaining faster electro-optic switching in an LC device comprising the steps of providing graphene in an ethanol solvent, adding a liquid crystal to the graphene and ethanol solution, forming a liquid crystal graphene ethanol solution, evaporating the ethanol, and forming a pure liquid crystal graphene mixture. A liquid crystal device with faster electro-optic switching and higher polar anchoring strength comprising an LC cell having a polyimide (PI) alignment layer, the liquid crystal graphene mixture, wherein the graphene flakes preferentially attach to the PI alignment layer; wherein the effective polar anchoring energy in the LC cell is enhanced by an order of magnitude and wherein the electro-optic response of the LC is accelerated.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: August 31, 2021
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Rajratan Basu
  • Graphene As An Alignment Layer And Electrode For Liquid Crystal Devices
    Publication number: 20210255516
    Abstract: A graphene and liquid crystal device comprising a substrate, a layer of graphene on the substrate, and a layer of liquid crystal on the layer of graphene. A graphene and liquid crystal device wherein the layer of graphene is an alignment layer and an electrode for a liquid crystal device.
    Type: Application
    Filed: May 5, 2021
    Publication date: August 19, 2021
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rajratan Basu, Daniel Kinnamon, Christopher M. Spillmann, Jakub Kolacz, Jesse A. Frantz, Jason D. Myers
  • Tuning the polar anchoring strength by doping graphene flakes and resulting accelerated electro-optic switching in liquid crystal devices
    Publication number: 20200409194
    Abstract: A method of achieving higher polar anchoring strength of liquid crystal (LC) using monolayer graphene flakes in an LC device and attaining faster electro-optic switching in an LC device comprising the steps of providing graphene in an ethanol solvent, adding a liquid crystal to the graphene and ethanol solution, forming a liquid crystal graphene ethanol solution, evaporating the ethanol, and forming a pure liquid crystal graphene mixture. A liquid crystal device with faster electro-optic switching and higher polar anchoring strength comprising an LC cell having a polyimide (PI) alignment layer, the liquid crystal graphene mixture, wherein the graphene flakes preferentially attach to the PI alignment layer; wherein the effective polar anchoring energy in the LC cell is enhanced by an order of magnitude and wherein the electro-optic response of the LC is accelerated.
    Type: Application
    Filed: October 18, 2018
    Publication date: December 31, 2020
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Rajratan Basu
  • Utilizing 2D h-BN nanosheets as the planar-alignment agent in an electro-optical liquid crystal device to improve its optical transmission
    Patent number: 10739650
    Abstract: An electro-optical liquid crystal cell comprising a first substrate, a first layer of indium tin oxide (ITO) on the first substrate, a first layer of h-BN on the first layer of ITO on the first substrate, and a layer of liquid crystal on the first layer of h-BN on the first layer of ITO on the first substrate. Furthermore, the electro-optical liquid crystal cell can comprise a second layer of h-BN, a second layer of ITO, and a second substrate. This h-BN cell exhibits the required electro-optic effect needed for a liquid crystal display. This h-BN cell exhibits high optical transmission.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: August 11, 2020
    Assignee: The Government of the United States of America, as represented the Secretary of the Navy
    Inventor: Rajratan Basu
  • Graphene As An Alignment Layer And Electrode For Liquid Crystal Devices
    Publication number: 20200142271
    Abstract: A graphene and liquid crystal device comprising a substrate, a layer of graphene on the substrate, and a layer of liquid crystal on the layer of graphene. A graphene and liquid crystal device wherein the layer of graphene is an alignment layer and an electrode for a liquid crystal device.
    Type: Application
    Filed: January 9, 2020
    Publication date: May 7, 2020
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rajratan Basu, Daniel Kinnamon, Christopher M. Spillmann, Jakub Kolacz, Jesse A. Frantz, Jason D. Myers
  • Graphene as an alignment layer and electrode for liquid crystal devices
    Patent number: 10564505
    Abstract: A graphene and liquid crystal device comprising a substrate, a layer of graphene on the substrate, and a layer of liquid crystal on the layer of graphene. A method of making a graphene and liquid crystal device comprising the steps of providing a substrate, depositing a layer of graphene on the substrate, and depositing a layer of liquid crystals on the layer of graphene.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: February 18, 2020
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rajratan Basu, Daniel Kinnamon, Christopher M. Spillmann, Jakub Kolacz, Jesse A. Frantz, Jason D. Myers
  • Tuning the polar anchoring strength by doping graphene flakes and resulting accelerated electro-optic switching in liquid crystal devices
    Publication number: 20190384083
    Abstract: A method of achieving higher polar anchoring strength of liquid crystal (LC) using monolayer graphene flakes in an LC device and attaining faster electro-optic switching in an LC device comprising the steps of providing graphene in an ethanol solvent, adding a liquid crystal to the graphene and ethanol solution, forming a liquid crystal graphene ethanol solution, evaporating the ethanol, and forming a pure liquid crystal graphene mixture. A liquid crystal device with faster electro-optic switching and higher polar anchoring strength comprising an LC cell having a polyimide (PI) alignment layer, the liquid crystal graphene mixture, wherein the graphene flakes preferentially attach to the PI alignment layer; wherein the effective polar anchoring energy in the LC cell is enhanced by an order of magnitude and wherein the electro-optic response of the LC is accelerated.
    Type: Application
    Filed: October 18, 2018
    Publication date: December 19, 2019
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventor: Rajratan Basu
  • Graphene As An Alignment Layer And Electrode For Liquid Crystal Devices
    Publication number: 20180284518
    Abstract: A graphene and liquid crystal device comprising a substrate, a layer of graphene on the substrate, and a layer of liquid crystal on the layer of graphene. A method of making a graphene and liquid crystal device comprising the steps of providing a substrate, depositing a layer of graphene on the substrate, and depositing a layer of liquid crystals on the layer of graphene.
    Type: Application
    Filed: March 19, 2018
    Publication date: October 4, 2018
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rajratan Basu, Daniel Kinnamon, Christopher M. Spillmann, Jakub Kolacz, Jesse A. Frantz, Jason D. Myers