The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2019
Filed:
Dec. 07, 2017
Northwestern University, Evanston, IL (US);
Battelle Memorial Institute, Columbus, OH (US);
The Trustees of Columbia University IN the City of New York, New York, NY (US);
Franz M. Geiger, Evanston, WI (US);
Paul E. Ohno, Evanston, IL (US);
Hong-fei Wang, Richland, WA (US);
Kenneth B. Eisenthal, New York City, NY (US);
Northwestern University, Evanston, IL (US);
Battelle Memorial Institute, Columbus, OH (US);
The Trustees of Columbia University in the City of New York, New York, NY (US);
Abstract
Methods of generating second harmonic generation (SHG) signals from interfaces formed with, or formed over, a noncentrosymmetric material, e.g., α-quartz, are provided. The methods make use of the noncentrosymmetric material as an internal phase reference for the determination of a variety of interfacial electrostatic parameters, including interfacial potential, interfacial charge density, and the sign of the interfacial charge (i.e., net positive or net negative).