Patents by Inventor Radovan Urban

Radovan Urban 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).

  • Method of fabricating nanotips with controlled profile
    Patent number: 9102190
    Abstract: A nanotip, is fabricated by modifying a precursor nanotip having an apex and a shank by applying an electric field in the presence of a reactive gas to perform field-assisted etching wherein atoms are preferentially removed from the shank by chemical interaction with the reactive gas, and controlling the reactive gas pressure and/or tip voltage to vary the electric field so as to promote field evaporation of apex atoms during fabrication of the nanotip and thereby control the overall profile of the resulting nano-tip. The method permits shaping of the overall tip profile.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: August 11, 2015
    Assignees: National Research Council of Canada, The Governors of the University of Alberta
    Inventors: Jason L. Pitters, Radovan Urban, Robert A Wolcow
  • METHOD OF FABRICATING NANOTIPS WITH CONTROLLED PROFILE
    Publication number: 20140231379
    Abstract: A nanotip, is fabricated by modifying a precursor nanotip having an apex and a shank by applying an electric field in the presence of a reactive gas to perform field-assisted etching wherein atoms are preferentially removed from the shank by chemical interaction with the reactive gas, and controlling the reactive gas pressure and/or tip voltage to vary the electric field so as to promote field evaporation of apex atoms during fabrication of the nanotip and thereby control the overall profile of the resulting nano-tip. The method permits shaping of the overall tip profile.
    Type: Application
    Filed: September 26, 2012
    Publication date: August 21, 2014
    Applicants: NATIONAL RESEARCH COUNCIL OF CANADA, THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Jason L. Pitters, Radovan Urban, Robert A. Wolkow