Patents by Inventor Barada K. Nayak

Barada K. Nayak 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: 10131086
    Abstract: A method for the replication of a textured surface of a master is disclosed, in which the textured surface of the master is comprised of micron-scale cones having nano- or micro-scale surface features. Alternatively, the master may be comprised of micron-scale structures, nano-scale structures, and micron scale structures having nano-scale surface features. Replication can be achieved through a molding or embossing technique. Using these technique, the textured surface of the master is faithfully replicated onto the surface of the replica. A number of representative materials and additional processing steps are also disclosed. The replicated texture exhibits many useful properties, including enhanced hydrophobicity and reduced light reflection properties, making the disclosed method a simple and attractive alternative to existing texturing techniques.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: November 20, 2018
    Assignee: University of Virginia Patent Foundation
    Inventors: Mool C. Gupta, Barada K. Nayak, Paul O. Caffrey
  • Patent number: 8846551
    Abstract: The surface of a material is textured and by exposing the surface to pulses from an ultrafast laser. The laser treatment causes pillars to form on the treated surface. These pillars provide for greater light absorption. Texturing and crystallization can be carried out as a single step process. The crystallization of the material provides for higher electric conductivity and changes in optical and electronic properties of the material. The method may be performed in vacuum or a gaseous environment. The gaseous environment may aid in texturing and/or modifying physical and chemical properties of the surfaces. This method may be used on various material surfaces, such as semiconductors, metals and their alloys, ceramics, polymers, glasses, composites, as well as crystalline, nanocrystalline, polycrystalline, microcrystalline, and amorphous phases.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: September 30, 2014
    Assignee: University of Virginia Patent Foundation
    Inventors: Mool C. Gupta, Barada K. Nayak
  • Publication number: 20140273535
    Abstract: The surface of a material is textured and crystallized in a single step by exposing the surface to pulses from an ultrafast laser. The laser treatment causes pillars to form on the treated surface. These pillars provide for greater light absorption. The crystallization of the material provides for higher electric conductivity and changes in optical properties of the material. The method may be performed in a gaseous environment, so that laser assisted chemical etching will aid in the texturing of the surface. This method may be used on various material surfaces, such as semiconductors, metals, ceramics, polymers, and glasses.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
    Inventors: Mool C. Gupta, Barada K. Nayak
  • Patent number: 8753990
    Abstract: The surface of a material is textured and crystallized in a single step by exposing the surface to pulses from an ultrafast laser. The laser treatment causes pillars to form on the treated surface. These pillars provide for greater light absorption. The crystallization of the material provides for higher electric conductivity and changes in optical properties of the material. The method may be performed in a gaseous environment, so that laser assisted chemical etching will aid in the texturing of the surface. This method may be used on various material surfaces, such as semiconductors, metals, ceramics, polymers, and glasses.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: June 17, 2014
    Assignee: University of Virginia Patent Foundation
    Inventors: Mool C. Gupta, Barada K. Nayak
  • Publication number: 20130189485
    Abstract: A method for the replication of a textured surface of a master is disclosed, in which the textured surface of the master is comprised of micron-scale cones having nano- or micro-scale surface features. Alternatively, the master may be comprised of micron-scale structures, nano-scale structures, and micron scale structures having nano-scale surface features. Replication can be achieved through a molding or embossing technique. Using these technique, the textured surface of the master is faithfully replicated onto the surface of the replica. A number of representative materials and additional processing steps are also disclosed. The replicated texture exhibits many useful properties, including enhanced hydrophobicity and reduced light reflection properties, making the disclosed method a simple and attractive alternative to existing texturing techniques.
    Type: Application
    Filed: June 28, 2012
    Publication date: July 25, 2013
    Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
    Inventors: Mool C. Gupta, Barada K. Nayak, Paul O. Caffrey
  • Publication number: 20100219506
    Abstract: The surface of a material is textured and crystallized in a single step by exposing the surface to pulses from an ultrafast laser. The laser treatment causes pillars to form on the treated surface. These pillars provide for greater light absorption. The crystallization of the material provides for higher electric conductivity and changes in optical properties of the material. The method may be performed in a gaseous environment, so that laser assisted chemical etching will aid in the texturing of the surface. This method may be used on various material surfaces, such as semiconductors, metals, ceramics, polymers, and glasses.
    Type: Application
    Filed: December 21, 2006
    Publication date: September 2, 2010
    Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
    Inventors: Mool C. Gupta, Barada K. Nayak
  • Publication number: 20100143744
    Abstract: The surface of a material is textured and by exposing the surface to pulses from an ultrafast laser. The laser treatment causes pillars to form on the treated surface. These pillars provide for greater light absorption. Texturing and crystallization can be carried out as a single step process. The crystallization of the material provides for higher electric conductivity and changes in optical and electronic properties of the material. The method may be performed in vacuum or a gaseous environment. The gaseous environment may aid in texturing and/or modifying physical and chemical properties of the surfaces. This method may be used on various material surfaces, such as semiconductors, metals and their alloys, ceramics, polymers, glasses, composites, as well as crystalline, nanocrystalline, polycrystalline, microcrystalline, and amorphous phases.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 10, 2010
    Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
    Inventors: Mool C. Gupta, Barada K. Nayak