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).
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Patent number: 12176121Abstract: 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: GrantFiled: October 2, 2023Date of Patent: December 24, 2024Assignee: Vanderbilt UniversityInventor: Justus C. Ndukaife
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Publication number: 20240075475Abstract: 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: ApplicationFiled: August 23, 2023Publication date: March 7, 2024Inventors: Justus C. Ndukaife, Chuchuan Hong
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Publication number: 20240029912Abstract: 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: ApplicationFiled: October 2, 2023Publication date: January 25, 2024Inventor: Justus C. Ndukaife
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Patent number: 11823807Abstract: 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: GrantFiled: July 27, 2021Date of Patent: November 21, 2023Assignee: Vanderbilt UniversityInventor: Justus C. Ndukaife
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Publication number: 20220028572Abstract: 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: ApplicationFiled: July 27, 2021Publication date: January 27, 2022Inventor: Justus C. Ndukaife
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Patent number: 10969522Abstract: 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: GrantFiled: April 14, 2020Date of Patent: April 6, 2021Assignee: Vanderbilt UniversityInventor: Justus C. Ndukaife
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Patent number: 10876946Abstract: 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: GrantFiled: December 17, 2019Date of Patent: December 29, 2020Assignee: Purdue Research FoundationInventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
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Publication number: 20200241177Abstract: 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: ApplicationFiled: April 14, 2020Publication date: July 30, 2020Inventor: Justus C. Ndukaife
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Patent number: 10656311Abstract: 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: GrantFiled: March 26, 2019Date of Patent: May 19, 2020Assignee: Vanderbilt UniversityInventor: Justus C. Ndukaife
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Publication number: 20200141852Abstract: 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: ApplicationFiled: December 17, 2019Publication date: May 7, 2020Applicant: Purdue Research FoundationInventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
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Patent number: 10508981Abstract: 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: GrantFiled: January 15, 2019Date of Patent: December 17, 2019Assignee: Purdue Research FoundationInventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
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Patent number: 10436780Abstract: 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: GrantFiled: June 6, 2016Date of Patent: October 8, 2019Assignee: PURDUE RESEARCH FOUNDATIONInventors: Justus C. Ndukaife, Alexander V. Kildishev, Agbai (George) A. Nnanna, Alexandra Boltasseva, Vladimir M. Shalaev, Steven Truitt Wereley
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Publication number: 20190302326Abstract: 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: ApplicationFiled: March 26, 2019Publication date: October 3, 2019Inventor: Justus C. Ndukaife
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Publication number: 20190154558Abstract: 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: ApplicationFiled: January 15, 2019Publication date: May 23, 2019Applicant: Purdue Research FoundationInventors: Justus C. Ndukaife, Alexandra Boltasseva, Agbai Nnanna
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Patent number: 10180383Abstract: 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: GrantFiled: March 31, 2017Date of Patent: January 15, 2019Assignee: PURDUE RESEARCH FOUNDATIONInventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
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Publication number: 20170284935Abstract: 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: ApplicationFiled: March 31, 2017Publication date: October 5, 2017Applicant: Purdue Research FoundationInventors: Justus C Ndukaife, Alexandra Boltasseva, Agbai Nnanna
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Patent number: 9443632Abstract: The present disclosure relates generally to plasmonic substrates and specifically to high-throughput trapping of particles on a plasmonic substrate.Type: GrantFiled: June 6, 2015Date of Patent: September 13, 2016Assignee: PURDUE RESEARCH FOUNDATIONInventors: Steven Wereley, Agbai A Nnanna, Alexandra Boltasseva, Justus C Ndukaife, Avanish Mishra
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Publication number: 20150380120Abstract: The present disclosure relates generally to plasmonic substrates and specifically to high-throughput trapping of particles on a plasmonic substrate.Type: ApplicationFiled: June 6, 2015Publication date: December 31, 2015Inventors: Steven Wereley, Agbai A. Nnanna, Alexandra Boltasseva, Justus C. Ndukaife