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Photoacoustic microcantilevers

United States Patent

June 5, 2012
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Photoacoustic Microcantilevers for Spectroscopy
A system generates a photoacoustic spectrum in an open or closed environment with reduced noise. A source focuses a beam on a target substance disposed on a base. The base supports a cantilever that measures acoustic waves generated as light is absorbed by the target substance. By focusing a chopped/pulsed light beam on the target substance, a range of optical absorbance may be measured as the wavelength of light changes. An identifying spectrum of the target may detected by monitoring the vibration intensity variation of the cantilever as a function of illuminating wavelength or color.
Thundat; Thomas G. (Knoxville, TN), Van Neste; Charles W. (Kingston, TN), Brown; Gilbert M. (Knoxville, TN), Senesac; Lawrence R. (Knoxville, TN)
UT-Battellle, LLC (Oak Ridge, TN)
12/ 488,238
June 19, 2009
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.