Patents by Inventor Donglei Fan

Donglei Fan 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: 9957163
    Abstract: The present invention includes an apparatus and a method of making a three dimensional graphite structure with a controlled porosity comprising: plating a metal layer on at least one of a nickel, an iron or a cobalt foam substrate; annealing the metal and the nickel, iron or cobalt foam into a porous metal-nickel, iron or cobalt catalyst, wherein the catalyst has a smooth and a porous surface; etching the smooth surface of the annealed porous metal-nickel, iron or cobalt catalyst; growing a carbonaceous layer on the porous surface of the annealed porous metal-nickel, iron or cobalt catalyst; and completely etching the porous metal-nickel, iron or cobalt catalyst to obtain the graphite layer.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: May 1, 2018
    Assignee: Board of Regents, The University of Texas System
    Inventors: Donglei Fan, Jing Ning, Xiaobin Xu, Jianhe Guo
  • Publication number: 20170368557
    Abstract: A continuous flow particle separation system for separating metallic and nonmetallic particles from a mixed-particle suspension includes a fluid channeling component defining an input channel and first and second output channels fluidly connected to the input channel at a bifurcated junction, a first electrode and a second electrode arranged proximate the input channel at least partially prior to the bifurcated junction, and an alternating current (AC) electric power source electrically connected to the first and second electrodes.
    Type: Application
    Filed: July 5, 2017
    Publication date: December 28, 2017
    Applicant: The Johns Hopkins University
    Inventors: Su Chih Chi, Robert Cammarata, Stephen L. Farias, Donglei Fan, Danru Qu, Chia-Ling Chien
  • Patent number: 9751091
    Abstract: A continuous flow particle separation system for separating metallic and nonmetallic particles from a mixed-particle suspension includes a fluid channeling component defining an input channel and first and second output channels fluidly connected to the input channel at a bifurcated junction, a first electrode and a second electrode arranged proximate the input channel at least partially prior to the bifurcated junction, and an alternating current (AC) electric power source electrically connected to the first and second electrodes.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: September 5, 2017
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Su Chih Chi, Robert Cammarata, Stephen L. Farias, Donglei Fan, Danru Qu, Chia-Ling Chien
  • Publication number: 20170250625
    Abstract: The invention includes miniature dots, miniature disks or miniature cylinders and methods of making the same by dispersing a particle in or on a dissolvable, meltable or etchable layer on a substrate, a portion of the particle exposed above a surface of the dissolvable, meltable or etchable layer; depositing a mask on the particles and the dissolvable substrate; removing the particles from the layer; etching an array of nanoholes in the substrate; depositing one or more metallic layers into the nanoholes to form an array of dots, disks or cylinders; and dissolving the dissolvable layer with a solvent to expose the dots, disks or cylinders. The dots, disks or cylinders can be included with two sets of microelectrodes for ultrahigh speed rotation of miniature motors, and/or can be designed with a magnetic configuration into miniature motors for uniform rotation speeds and prescribed angular displacement.
    Type: Application
    Filed: September 9, 2015
    Publication date: August 31, 2017
    Inventors: Donglei Fan, Kwanoh Kim, Jianhe Guo
  • Patent number: 9718683
    Abstract: A method for assembling multi-component nano-structures that includes dispersing a plurality of nano-structures in a fluid medium, and applying an electric field having an alternating current (AC) component and a direct current (DC) component to the fluid medium containing the plurality of nano-structures. The electric field causes a first nano-structure from the plurality of nano-structures to move to a predetermined position and orientation relative to a second nano-structure of the plurality of nano-structures such that the first and second nano-structures assemble into a multi-component nano-structure.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: August 1, 2017
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Chia-Ling Chien, Donglei Fan, Robert Cammarata
  • Patent number: 9638639
    Abstract: The present invention includes nanotubes or rods, methods and arrays using plasmonic-magnetic bifunctional nanotubes or rods comprising: one or more silica nanotubes or rods; one or more nanomagnets embedded in a portion of the silica nanotubes or rods; and plasmonic metal nanoparticles uniformly coating in or on at least a portion of the surface of the nanomagnets and the silica nanotubes surface-coated.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: May 2, 2017
    Assignee: Board of Regents, The University of Texas System
    Inventors: Donglei Fan, Xiaobin Xu
  • Publication number: 20170115227
    Abstract: The present invention includes nanotubes or rods, methods and arrays using plasmonic-magnetic bifunctional nanotubes or rods comprising: one or more silica nanotubes or rods; one or more nanomagnets embedded in a portion of the silica nanotubes or rods; and plasmonic metal nanoparticles uniformly coating in or on at least a portion of the surface of the nanomagnets and the silica nanotubes surface-coated.
    Type: Application
    Filed: January 4, 2017
    Publication date: April 27, 2017
    Inventors: Donglei Fan, Xiaobin Xu
  • Publication number: 20150360952
    Abstract: The present invention includes an apparatus and a method of making a three dimensional graphite structure with a controlled porosity comprising: plating a metal layer on at least one of a nickel, an iron or a cobalt foam substrate; annealing the metal and the nickel, iron or cobalt foam into a porous metal-nickel, iron or cobalt catalyst, wherein the catalyst has a smooth and a porous surface; etching the smooth surface of the annealed porous metal-nickel, iron or cobalt catalyst; growing a carbonaceous layer on the porous surface of the annealed porous metal-nickel, iron or cobalt catalyst; and completely etching the porous metal-nickel, iron or cobalt catalyst to obtain the graphite layer.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 17, 2015
    Inventors: Donglei Fan, Jing Ning, Xiaobin Xu, Jianhe Guo
  • Publication number: 20150353354
    Abstract: A method for assembling multi-component nano-structures that includes dispersing a plurality of nano-structures in a fluid medium, and applying an electric field having an alternating current (AC) component and a direct current (DC) component to the fluid medium containing the plurality of nano-structures. The electric field causes a first nano-structure from the plurality of nano-structures to move to a predetermined position and orientation relative to a second nano-structure of the plurality of nano-structures such that the first and second nano-structures assemble into a multi-component nano-structure.
    Type: Application
    Filed: March 31, 2015
    Publication date: December 10, 2015
    Inventors: Chia-Ling Chien, Donglei Fan, Robert Cammarata
  • Patent number: 9044808
    Abstract: A method for assembling multi-component nano-structures that includes dispersing a plurality of nano-structures in a fluid medium, and applying an electric field having an alternating current (AC) component and a direct current (DC) component to the fluid medium containing the plurality of nano-structures. The electric field causes a first nano-structure from the plurality of nano-structures to move to a predetermined position and orientation relative to a second nano-structure of the plurality of nano-structures such that the first and second nano-structures assemble into a multi-component nano-structure.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: June 2, 2015
    Assignee: The Johns Hopkins University
    Inventors: Chia-Ling Chien, Donglei Fan, Robert Charles Cammarata
  • Publication number: 20140356411
    Abstract: The present invention includes nanotubes or rods, methods and arrays using plasmonic-magnetic bifunctional nanotubes or rods comprising: one or more silica nanotubes or rods; one or more nanomagnets embedded in a portion of the silica nanotubes or rods; and plasmonic metal nanoparticles uniformly coating in or on at least a portion of the surface of the nanomagnets and the silica nanotubes surface-coated.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 4, 2014
    Inventors: Donglei Fan, Xiaobin Xu
  • Publication number: 20140346045
    Abstract: A continuous flow particle separation system for separating metallic and nonmetallic particles from a mixed-particle suspension includes a fluid channeling component defining an input channel and first and second output channels fluidly connected to the input channel at a bifurcated junction, a first electrode and a second electrode arranged proximate the input channel at least partially prior to the bifurcated junction, and an alternating current (AC) electric power source electrically connected to the first and second electrodes.
    Type: Application
    Filed: March 19, 2014
    Publication date: November 27, 2014
    Applicant: The Johns Hopkins University
    Inventors: Su Chih Chi, Robert Cammarata, Stephen L. Farias, Donglei Fan, Danru Qu, Chia-Ling Chien
  • Publication number: 20140346044
    Abstract: A continuous flow particle separation system for separating metallic and nonmetallic particles from a mixed-particle suspension includes a fluid channeling component defining an input channel and first and second output channels fluidly connected to the input channel at a bifurcated junction, a first electrode and a second electrode arranged proximate the input channel at least partially prior to the bifurcated junction, and an alternating current (AC) electric power source electrically connected to the first and second electrodes.
    Type: Application
    Filed: May 24, 2013
    Publication date: November 27, 2014
    Applicant: The Johns Hopkins University
    Inventors: Su Chih Chi, Robert Cammarata, Stephen L. Farias, Donglei Fan, Danru Qu, Chia-Ling Chien
  • Publication number: 20120219772
    Abstract: A method for assembling multi-component nano-structures that includes dispersing a plurality of nano-structures in a fluid medium, and applying an electric field having an alternating current (AC) component and a direct current (DC) component to the fluid medium containing the plurality of nano-structures. The electric field causes a first nano-structure from the plurality of nano-structures to move to a predetermined position and orientation relative to a second nano-structure of the plurality of nano-structures such that the first and second nano-structures assemble into a multi-component nano-structure.
    Type: Application
    Filed: March 3, 2010
    Publication date: August 30, 2012
    Applicant: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Chia-Ling Chien, Donglei Fan, Robert Charles Cammarata
  • Publication number: 20110311791
    Abstract: A method for assembling multi-component nano-structures that includes dispersing a plurality of nano-structures in a fluid medium, and applying an electric field having an alternating current (AC) component and a direct current (DC) component to the fluid medium containing the plurality of nano-structures. The electric field causes a first nano-structure from the plurality of nano-structures to move to a predetermined position and orientation relative to a second nano-structure of the plurality of nano-structures such that the first and second nano-structures assemble into a multi-component nano-structure.
    Type: Application
    Filed: March 3, 2010
    Publication date: December 22, 2011
    Applicant: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Chia-Ling Chien, Donglei Fan, Robert Charles Cammarata
  • Publication number: 20080204966
    Abstract: Systems and methods for manipulating nanostructures, such as nanospheres, nanodisks, nanowires, and nanotubes. The systems and methods permit the construction of nano-scale contacts, scaffolds, and motors using electric fields that do not require the use of toxic nanostructure materials. The electric fields are imposed on the nanostructures using electrodes having specific shapes and driven with voltages having particular amplitudes, frequencies, and phase differences. The electrode shape and voltage characteristics influence the configuration of the electric fields, which in turn influences the ultimate configuration of the nanostructures. The nanostructures retain their configuration after the electric fields and any transport medium, such as deionized water, are removed.
    Type: Application
    Filed: September 21, 2005
    Publication date: August 28, 2008
    Applicant: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Donglei Fan, Frank Q. Zhu, Chia-Ling Chien, Robert C. Cammarata