Patents by Inventor David B. Janes

David B. Janes 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).

  • 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
  • Patent number: 11650144
    Abstract: Aspects of the present disclosure involve systems, methods, and the like, for a fabrication of a particulate matter (PM) sensor that utilizes a capacitance sensor to detect sub-micrometer and nanoparticles in the respirable range of an environment. In one implementation, the capacitance sensor may comprise interdigitated electrodes between which a capacitance may be measured. PM deposited on the sensor may cause the capacitance between the electrodes to be altered and such a change in capacitance may be measured by the PM sensor. This measurement of the change in capacitance of the interdigitated capacitance sensor may therefore be correlated to the presence of sub-micrometer and nanoparticles in an environment. In one particular implementation, the PM sensor may further include a micro-heater circuit, a readout circuit, and an interface connecting the readout circuit to the micro-heater/capacitance sensor of the PM sensor.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: May 16, 2023
    Assignees: Colorado State University Research Foundation, Purdue Research Foundation
    Inventors: Su-Jung (Candace) Tsai, Doosan Back, David B. Janes
  • 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
  • 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
  • Publication number: 20210247290
    Abstract: Aspects of the present disclosure involve systems, methods, and the like, for a fabrication of a particulate matter (PM) sensor that utilizes a capacitance sensor to detect sub-micrometer and nanoparticles in the respirable range of an environment. In one implementation, the capacitance sensor may comprise interdigitated electrodes between which a capacitance may be measured. PM deposited on the sensor may cause the capacitance between the electrodes to be altered and such a change in capacitance may be measured by the PM sensor. This measurement of the change in capacitance of the interdigitated capacitance sensor may therefore be correlated to the presence of sub-micrometer and nanoparticles in an environment. In one particular implementation, the PM sensor may further include a micro-heater circuit, a readout circuit, and an interface connecting the readout circuit to the micro-heater/capacitance sensor of the PM sensor.
    Type: Application
    Filed: February 11, 2021
    Publication date: August 12, 2021
    Applicants: Colorado State University Research Foundation, Purdue Research Foundation
    Inventors: Su-Jung (Candace) Tsai, Doosan Back, David B. Janes
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 8872154
    Abstract: Methods and apparatus for an electronic device such as a field effect transistor. One embodiment includes fabrication of an FET utilizing single walled carbon nanotubes as the semiconducting material. In one embodiment, the FETs are vertical arrangements of SWCNTs, and in some embodiments prepared within porous anodic alumina (PAA). Various embodiments pertain to different methods for fabricating the drains, sources, and gates.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: October 28, 2014
    Assignee: Purdue Research Foundation
    Inventors: Aaron D. Franklin, Timothy D. Sands, Timothy S. Fisher, David B. Janes
  • 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
  • Publication number: 20110253970
    Abstract: Disclosed are fully transparent nanowire transistors having high field-effect mobilities. The fully transparent nanowire transistors disclosed herein include one or more nanowires, a gate dielectric prepared from a transparent inorganic or organic material, and transparent source, drain, and gate contacts fabricated on a transparent substrate. The fully transparent nanowire transistors disclosed herein also can be mechanically flexible.
    Type: Application
    Filed: March 21, 2011
    Publication date: October 20, 2011
    Inventors: Tobin J. Marks, David B. Janes, Sanghyun Ju, Peide Ye, Chongwu Zhou, Antonio Facchetti
  • Patent number: 7910932
    Abstract: Disclosed are fully transparent nanowire transistors having high field-effect mobilities. The fully transparent nanowire transistors disclosed herein include one or more nanowires, a gate dielectric prepared from a transparent inorganic or organic material, and transparent source, drain, and gate contacts fabricated on a transparent substrate. The fully transparent nanowire transistors disclosed herein also can be mechanically flexible.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: March 22, 2011
    Assignees: Northwestern University, Purdue Research Foundation, University of Southern California
    Inventors: Tobin J. Marks, David B. Janes, Sanghyun Ju, Peide Ye, Chongwu Zhou, Antonio Facchetti
  • Publication number: 20100295023
    Abstract: Methods and apparatus for an electronic device such as a field effect transistor. One embodiment includes fabrication of an FET utilizing single walled carbon nanotubes as the semiconducting material. In one embodiment, the FETs are vertical arrangements of SWCNTs, and in some embodiments prepared within porous anodic alumina (PAA). Various embodiments pertain to different methods for fabricating the drains, sources, and gates.
    Type: Application
    Filed: April 6, 2010
    Publication date: November 25, 2010
    Applicant: PURDUE RESEARCH FOUNDATION
    Inventors: Aaron D. Franklin, Timothy D. Sands, Timothy S. Fisher, David B. Janes
  • Publication number: 20090050876
    Abstract: Disclosed are fully transparent nanowire transistors having high field-effect mobilities. The fully transparent nanowire transistors disclosed herein include one or more nanowires, a gate dielectric prepared from a transparent inorganic or organic material, and transparent source, drain, and gate contacts fabricated on a transparent substrate. The fully transparent nanowire transistors disclosed herein also can be mechanically flexible.
    Type: Application
    Filed: June 2, 2008
    Publication date: February 26, 2009
    Inventors: Tobin J. Marks, David B. Janes, Sanghyun Ju, Peide Ye, Chongwu Zhou, Antonio Facchetti