Patents by Inventor Sanjeevi Sivasankar

Sanjeevi Sivasankar 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).

  • Fluorescence axial localization with nanometer accuracy and precision
    Patent number: 9103784
    Abstract: We describe a new technique, standing wave axial nanometry (SWAN), to image the axial location of a single nanoscale fluorescent object with sub-nanometer accuracy and 3.7 nm precision. A standing wave, generated by positing an atomic force microscope tip over a focused laser beam, is used to excite fluorescence; axial position is determined from the phase of the mission intensity.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: August 11, 2015
    Assignee: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
    Inventors: Sanjeevi Sivasankar, Hui Li, Chi-Fu Yen
  • System, apparatus, and method for simultaneous single molecule atomic force microscopy and fluorescence measurements
    Patent number: 8656510
    Abstract: An apparatus, system, and method of integrating atomic force microscopy (AFM) and fluorescence microscopy (FM). One particular application is to simultaneous single molecular fluorescence with AFM force spectroscopy. Included is a methodology to align the AFM tip and a molecule or other nanoscale object with high accuracy.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: February 18, 2014
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Sanjeevi Sivasankar, Hui Li
  • Systems and methods of detecting force and stress using tetrapod nanocrystal
    Patent number: 8513624
    Abstract: Systems and methods of detecting force on the nanoscale including methods for detecting force using a tetrapod nanocrystal by exposing the tetrapod nanocrystal to light, which produces a luminescent response by the tetrapod nanocrystal. The method continues with detecting a difference in the luminescent response by the tetrapod nanocrystal relative to a base luminescent response that indicates a force between a first and second medium or stresses or strains experienced within a material. Such systems and methods find use with biological systems to measure forces in biological events or interactions.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: August 20, 2013
    Assignee: The Regents of the University of California
    Inventors: Charina L. Choi, Kristie J. Koski, Sanjeevi Sivasankar, A. Paul Alivisatos
  • Systems and Methods of Detecting Force and Stress Using Tetrapod Nanocrystal
    Publication number: 20120211670
    Abstract: Systems and methods of detecting force on the nanoscale are provided. The described invention includes methods for detecting force using a tetrapod nanocrystal by exposing the tetrapod nanocrystal to light, which produces a luminescent response by the tetrapod nanocrystal. The method continues with detecting a difference in the luminescent response by the tetrapod nanocrystal relative to a base luminescent response that indicates a force between a first and second medium or stresses or strains experienced within a material. Such systems and methods find use with biological systems to measure forces in biological events or interactions.
    Type: Application
    Filed: January 25, 2012
    Publication date: August 23, 2012
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Charina L. Choi, Kristie J. Koski, Sanjeevi Sivasankar, A. Paul Alivisatos
  • Methods of bonding optical structures, bonding and silylation of optical structures, bonded optical structures, and silylated bonded optical structures
    Patent number: 8123898
    Abstract: Methods of bonding optical structures, bonded optical structures, silylated bonded optical structures, and the like, are disclosed.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: February 28, 2012
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Sanjeevi Sivasankar, Steven Chu
  • Methods Of Bonding Optical Structures, Bonding And Silylation Of Optical Structures, Bonded Optical Structures, And Silylated Bonded Optical Structures
    Publication number: 20110039094
    Abstract: Methods of bonding optical structures, bonded optical structures, silylated bonded optical structures, and the like, are disclosed.
    Type: Application
    Filed: November 8, 2007
    Publication date: February 17, 2011
    Applicant: Stanford University
    Inventors: Sanjeevi Sivasankar, Steven Chu