Method and apparatus for detecting an analyte

DWPI Title: Sensing device for detecting presence of chemical analyte e.g. nitrous oxide, comprises micro-cantilever structure comprising top and bottom surfaces and cantilever length, and continuous or discontinuous absorbent crystalline layer
Abstract: We describe the use of coordination polymers (CP) as coatings on microcantilevers for the detection of chemical analytes. CP exhibit changes in unit cell parameters upon adsorption of analytes, which will induce a stress in a static microcantilever upon which a CP layer is deposited. We also describe fabrication methods for depositing CP layers on surfaces.
Use: Sensing device is used for detecting presence of chemical analyte e.g. water vapor, carbon dioxide, methanol, ethanol, carbon monoxide, nitric oxide, nitrous oxide, organic amine and organic compound containing nitrogen dioxide groups (all claimed).
Advantage: The sensing device efficiently detects the presence of chemical analyte of low concentration.
Novelty: A sensing device comprises a micro-cantilever structure comprising top and bottom surfaces and a cantilever length, and a continuous or discontinuous absorbent crystalline layer attached to top and/or bottom surfaces along at least a portion of the cantilever length. The absorbent crystalline layer comprises a coordination polymer coating having a crystal lattice whose dimensions change as the layer absorbs the chemical analyte, causing strain in the micro-cantilever structure to signal the presence of the chemical analyte.
Filed: 6/12/2008
Application Number: US2008137635A
Tech ID: SD 10729.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
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