Patents by Inventor Anyuan Cao

Anyuan Cao 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: 8586131
    Abstract: The present invention generally relates to liquid films containing nanostructured materials, and, optionally, the use of this arrangement to organize nanostructures and to transfer the nanostructures to a surface. Liquid films containing nanostructures, such as nanoscale wires, can be formed in a gas such as air. By choosing an appropriate liquid, a liquid film can be expanded, for example to form a “bubble” having a diameter of at least about 5 cm or 10 cm. The size of the bubble can be controlled, in some cases, by controlling the viscosity of the liquid film. In some embodiments, the viscosity can be controlled to be between about 15 Pa s and about 25 Pa s, or controlled using a mixture of an aqueous liquid and an epoxy. In some cases, the film of liquid may be contacted with a surface, which can be used to transfer at least some of the nanostructures to the surface. In some cases, the nanostructures may be transferred as an orderly or aligned array.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: November 19, 2013
    Assignees: President and Fellows of Harvard College, University of Hawaii
    Inventors: Charles M. Lieber, Guihua Yu, Anyuan Cao
  • Patent number: 8148276
    Abstract: A three-dimensional composite reinforcement, a three-dimensionally reinforced multifunctional nanocomposite, and methods of manufacture of each are disclosed. The three dimensional reinforcement comprises a two dimensional fiber cloth upon which carbon nanotubes have been grown, approximately perpendicular to the plane of the fiber cloth. The nanocomposite comprises the three-dimensional reinforcement and a surrounding matrix material. Examples illustrate improvements in the through-thickness mechanical, thermal, and electrical properties of the nanocomposite, in addition to substantial improvements in geometrical stability upon temperature changes and vibrational damping, compared to baseline composites reinforced with the two-dimensional fiber cloth alone.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: April 3, 2012
    Assignees: University of Hawaii, Rensselaer Polytechnic Institute
    Inventors: Mohammad Naghi Ghasemi Nejhad, Vinod P. Veedu, Anyuan Cao, Pulickel Ajayan, Davood Askari
  • Publication number: 20100143582
    Abstract: The present invention generally relates to liquid films containing nanostructured materials, and, optionally, the use of this arrangement to organize nanostructures and to transfer the nanostructures to a surface. Liquid films containing nanostructures, such as nanoscale wires, can be formed in a gas such as air. By choosing an appropriate liquid, a liquid film can be expanded, for example to form a “bubble” having a diameter of at least about 5 cm or 10 cm. The size of the bubble can be controlled, in some cases, by controlling the viscosity of the liquid film. In some embodiments, the viscosity can be controlled to be between about 15 Pa s and about 25 Pa s, or controlled using a mixture of an aqueous liquid and an epoxy. In some cases, the film of liquid may be contacted with a surface, which can be used to transfer at least some of the nanostructures to the surface. In some cases, the nanostructures may be transferred as an orderly or aligned array.
    Type: Application
    Filed: October 10, 2007
    Publication date: June 10, 2010
    Inventors: Charles M. Lieber, Guihua Yu, Anyuan Cao
  • Patent number: 7727624
    Abstract: An open-cell carbon nanotube foam is made of a plurality of separated carbon nanotubes. The foam exhibits a Poisson's ratio substantially equal to zero, a compressibility of at least 85%, a recovery rate of at least 120 mm/min, a compressive strength of at least 12 MPa, a sag factor of at least 4, a fatigue resistance to no more than 15% permanent deformation when subjected to at least 1,000 compressive cycles at a strain of 85%, and/or a resilience of between 25% and 30%. The carbon nanotubes may be multiwalled carbon nanotubes that are aligned parallel to a thickness of a film comprising the foam.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: June 1, 2010
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Anyuan Cao, Pulickel Ajayan
  • Publication number: 20070298168
    Abstract: A brush includes a microscale handle and nanostructure bristles, such as carbon nanotube bristles, located on at least one portion of the handle.
    Type: Application
    Filed: June 9, 2006
    Publication date: December 27, 2007
    Inventors: Pulickel M. Ajayan, Anyuan Cao, Vinod Veedu, Mohammad Naghi Ghasemi-Nejhad, Xuesong Li
  • Publication number: 20070218202
    Abstract: A method of controllably aligning carbon nanotubes to a template structure to fabricate a variety of carbon nanotube containing structures and devices having desired characteristics is provided. The method allows simultaneous, selective growth of both vertically and horizontally controllably aligned nanotubes on the template structure but not on a substrate in a single process step.
    Type: Application
    Filed: January 12, 2007
    Publication date: September 20, 2007
    Inventors: Pulickel Ajayan, G. Ramanath, Bingqing Wei, Anyuan Cao, Yung Jung
  • Publication number: 20070213419
    Abstract: An open-cell carbon nanotube foam is made of a plurality of separated carbon nanotubes. The foam exhibits a Poisson's ratio substantially equal to zero, a compressibility of at least 85%, a recovery rate of at least 120 mm/min, a compressive strength of at least 12 MPa, a sag factor of at least 4, a fatigue resistance to no more than 15% permanent deformation when subjected to at least 1,000 compressive cycles at a strain of 85%, and/or a resilience of between 25% and 30%. The carbon nanotubes may be multiwalled carbon nanotubes that are aligned parallel to a thickness of a film comprising the foam.
    Type: Application
    Filed: November 21, 2006
    Publication date: September 13, 2007
    Inventors: Anyuan Cao, Pulickel Ajayan
  • Publication number: 20070128960
    Abstract: A three-dimensional composite reinforcement, a three-dimensionally reinforced multifunctional nanocomposite, and methods of manufacture of each are disclosed. The three dimensional reinforcement comprises a two dimensional fiber cloth upon which carbon nanotubes have been grown, approximately perpendicular to the plane of the fiber cloth. The nanocomposite comprises the three-dimensional reinforcement and a surrounding matrix material. Examples illustrate improvements in the through-thickness mechanical, thermal, and electrical properties of the nanocomposite, in addition to substantial improvements in geometrical stability upon temperature changes and vibrational damping, compared to baseline composites reinforced with the two-dimensional fiber cloth alone.
    Type: Application
    Filed: September 19, 2006
    Publication date: June 7, 2007
    Inventors: Mohammad Ghasemi Nejhad, Vinod Veedu, Anyuan Cao, Pulickel Ajayan, Davood Askari
  • Patent number: 7189430
    Abstract: A method of controllably aligning carbon nanotubes to a template structure to fabricate a variety of carbon nanotube containing structures and devices having desired characteristics is provided. The method allows simultaneous, selective growth of both vertically and horizontally controllably aligned nanotubes on the template structure but not on a substrate in a single process step.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: March 13, 2007
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Pulickel M. Ajayan, Ramanath Ganapathiraman, Anyuan Cao
  • Publication number: 20030165418
    Abstract: A method of controllably aligning carbon nanotubes to a template structure to fabricate a variety of carbon nanotube containing structures and devices having desired characteristics is provided. The method allows simultaneous, selective growth of both vertically and horizontally controllably aligned nanotubes on the template structure but not on a substrate in a single process step.
    Type: Application
    Filed: February 11, 2003
    Publication date: September 4, 2003
    Applicant: Rensselaer Polytechnic Institute
    Inventors: Pulickel M. Ajayan, G. Ramanath, Bingqing Wei, Anyuan Cao, Yung Joon Jung