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:
Jun. 14, 2011
Filed:
Jul. 20, 2006
Michael Roukes, Pasadena, CA (US);
Hongxing Tang, Pasadena, CA (US);
Jessica Arlett, S Pasadena, CA (US);
James Maloney, Pasadena, CA (US);
Benjamin Gudlewski, Pasadena, CA (US);
Michael Roukes, Pasadena, CA (US);
Hongxing Tang, Pasadena, CA (US);
Jessica Arlett, S Pasadena, CA (US);
James Maloney, Pasadena, CA (US);
Benjamin Gudlewski, Pasadena, CA (US);
California Institute of Technology, Pasadena, CA (US);
Abstract
A biosensor is comprised of a free and a biofunctionalized recognition self-sensing nanocantilever, a dock adjacent to the ends of the nanocantilevers, and a gap between the nanocantilevers and dock. The self-sensing cantilevers each include a semiconductor piezoresistor defined in a pair of legs about which the cantilevers flex. A bias power or current is applied to the piezoresistor. The sensitivity of the cantilevers is optimized for a given ambient temperature and geometry of the cantilevers and dock by minimizing the force spectral density, S, of the cantilevers to determine the optimum bias power, P. A sub-aN/√Hz force sensitivity is obtained by scaling down the dimensions of the cantilevers and supplying an optimum bias power as a function of temperature and geometry.