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Chemical sensor with oscillating cantilevered probe and mechanical stop

United States Patent

7,521,257
April 21, 2009
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
The invention provides a method of detecting a chemical species with an oscillating cantilevered probe. A cantilevered beam is driven into oscillation with a drive mechanism coupled to the cantilevered beam. A free end of the oscillating cantilevered beam is tapped against a mechanical stop coupled to a base end of the cantilevered beam. An amplitude of the oscillating cantilevered beam is measured with a sense mechanism coupled to the cantilevered beam. A treated portion of the cantilevered beam is exposed to the chemical species, wherein the cantilevered beam bends when exposed to the chemical species. A second amplitude of the oscillating cantilevered beam is measured, and the chemical species is determined based on the measured amplitudes.
Adams; Jesse D. (Reno, NV), Rogers; Benjamin S. (Reno, NV)
The Board of Regents of the Nevada System of Higher Education on Behalf of the University of Nevada, Reno (Reno, NV), N/A (
10/ 777,282
20050009197
February 10, 2004
STATEMENT OF GOVERNMENT RIGHTS This invention was made with Government support under Contract No. DE-AC05-00OR22725 awarded by the United States Department of Energy to the University of Nevada, Reno and the Government has certain rights in this invention.