Patents by Inventor Justus C. Ndukaife

Justus C. Ndukaife 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: 20240075475
    Abstract: A nanotweezer includes a first electrode, a second electrode including a central region surrounded by a plurality of nanoholes, a fluidic chamber between the first electrode and the second electrode, and a voltage source configured to generate an electric field between the first electrode and the second electrode.
    Type: Application
    Filed: August 23, 2023
    Publication date: March 7, 2024
    Inventors: Justus C. Ndukaife, Chuchuan Hong
  • Publication number: 20240029912
    Abstract: A nanotweezer and method of trapping and dynamic manipulation thereby are provided. The nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures arranged in an array, and a trapping region laterally displaced from the array; a second metastructure including a second substrate and a second electrode; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode; and a light source configured to selectively apply an excitation light to the microfluidic channel at a first location corresponding to the array, thereby to trap a nanoparticle at a second location corresponding to the trapping region.
    Type: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Inventor: Justus C. Ndukaife
  • Patent number: 11823807
    Abstract: A nanotweezer and method of trapping and dynamic manipulation thereby are provided. The nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures arranged in an array, and a trapping region laterally displaced from the array; a second metastructure including a second substrate and a second electrode; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode; and a light source configured to selectively apply an excitation light to the microfluidic channel at a first location corresponding to the array, thereby to trap a nanoparticle at a second location corresponding to the trapping region.
    Type: Grant
    Filed: July 27, 2021
    Date of Patent: November 21, 2023
    Assignee: Vanderbilt University
    Inventor: Justus C. Ndukaife
  • Publication number: 20220028572
    Abstract: A nanotweezer and method of trapping and dynamic manipulation thereby are provided. The nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures arranged in an array, and a trapping region laterally displaced from the array; a second metastructure including a second substrate and a second electrode; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode; and a light source configured to selectively apply an excitation light to the microfluidic channel at a first location corresponding to the array, thereby to trap a nanoparticle at a second location corresponding to the trapping region.
    Type: Application
    Filed: July 27, 2021
    Publication date: January 27, 2022
    Inventor: Justus C. Ndukaife
  • Patent number: 10969522
    Abstract: A nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures; a second metastructure including a second substrate and a second electrode, wherein the second substrate and the second electrode are substantially transparent to light within a wavelength range; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode a light source configured to selectively apply an excitation light to the microfluidic channel, the excitation light having a wavelength within the wavelength range. In response to the selective application of the electric field and/or the excitation light, nanoparticles within the microfluidic channel are manipulated.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: April 6, 2021
    Assignee: Vanderbilt University
    Inventor: Justus C. Ndukaife
  • Patent number: 10876946
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: December 29, 2020
    Assignee: Purdue Research Foundation
    Inventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Publication number: 20200241177
    Abstract: A nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures; a second metastructure including a second substrate and a second electrode, wherein the second substrate and the second electrode are substantially transparent to light within a wavelength range; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode a light source configured to selectively apply an excitation light to the microfluidic channel, the excitation light having a wavelength within the wavelength range. In response to the selective application of the electric field and/or the excitation light, nanoparticles within the microfluidic channel are manipulated.
    Type: Application
    Filed: April 14, 2020
    Publication date: July 30, 2020
    Inventor: Justus C. Ndukaife
  • Patent number: 10656311
    Abstract: A nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures; a second metastructure including a second substrate and a second electrode, wherein the second substrate and the second electrode are substantially transparent to light within a wavelength range; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode a light source configured to selectively apply an excitation light to the microfluidic channel, the excitation light having a wavelength within the wavelength range. In response to the selective application of the electric field and/or the excitation light, nanoparticles within the microfluidic channel are manipulated.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: May 19, 2020
    Assignee: Vanderbilt University
    Inventor: Justus C. Ndukaife
  • Publication number: 20200141852
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Application
    Filed: December 17, 2019
    Publication date: May 7, 2020
    Applicant: Purdue Research Foundation
    Inventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Patent number: 10508981
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: December 17, 2019
    Assignee: Purdue Research Foundation
    Inventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Patent number: 10436780
    Abstract: A particle sensing system which includes a plurality of micro-lenses which focus light from an unfocused or loosely focused light source onto a corresponding plurality of focus regions on a surface containing plasmonic structures. The absorption of light by the plasmonic structures in the focus regions results in heat dissipation in the plasmonic structures and consequently increases surface temperature in the focus regions. When an electrical field is applied to a sample fluid in contact with the surface, multiple electrothermal flows are induced in the fluid which rapidly transport suspended particles to the focus regions on the surface. The particles can then be captured and/or sensed.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: October 8, 2019
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Justus C. Ndukaife, Alexander V. Kildishev, Agbai (George) A. Nnanna, Alexandra Boltasseva, Vladimir M. Shalaev, Steven Truitt Wereley
  • Publication number: 20190302326
    Abstract: A nanotweezer comprises a first metastructure including a first substrate, a first electrode, and a plurality of plasmonic nanostructures; a second metastructure including a second substrate and a second electrode, wherein the second substrate and the second electrode are substantially transparent to light within a wavelength range; a microfluidic channel between the first metastructure and the second metastructure; a voltage source configured to selectively apply an electric field between the first electrode and the second electrode a light source configured to selectively apply an excitation light to the microfluidic channel, the excitation light having a wavelength within the wavelength range. In response to the selective application of the electric field and/or the excitation light, nanoparticles within the microfluidic channel are manipulated.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 3, 2019
    Inventor: Justus C. Ndukaife
  • Publication number: 20190154558
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Application
    Filed: January 15, 2019
    Publication date: May 23, 2019
    Applicant: Purdue Research Foundation
    Inventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Patent number: 10180383
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 15, 2019
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Publication number: 20170284935
    Abstract: An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Applicant: Purdue Research Foundation
    Inventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
  • Patent number: 9443632
    Abstract: The present disclosure relates generally to plasmonic substrates and specifically to high-throughput trapping of particles on a plasmonic substrate.
    Type: Grant
    Filed: June 6, 2015
    Date of Patent: September 13, 2016
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Steven Wereley, Agbai A Nnanna, Alexandra Boltasseva, Justus C Ndukaife, Avanish Mishra
  • Publication number: 20150380120
    Abstract: The present disclosure relates generally to plasmonic substrates and specifically to high-throughput trapping of particles on a plasmonic substrate.
    Type: Application
    Filed: June 6, 2015
    Publication date: December 31, 2015
    Inventors: Steven Wereley, Agbai A. Nnanna, Alexandra Boltasseva, Justus C. Ndukaife