Authors: A. Loui, T.V. Ratto, T.S. Wilson, E.V. Mukerjee, Z-Y Hu, T.A. Sulchek and B.R. Hart
Affilation: Lawrence Livermore National Laboratory, United States
Pages: 37 - 40
Keywords: microcantilever, chemical sensor, polymers
A compact and low-power cantilever-based sensor array has been developed and used to detect various vapor analytes. This device employs sorptive polymers that are deposited onto piezoresistive cantilevers. We have successfully detected several organic vapors, representing a breadth of chemical properties and over a range of concentrations. Comparisons of the polymer/vapor partition coefficient to the cantilever deflection responses show that a simple linear relationship does not exist, emphasizing the need to develop an appropriate functional model to describe the chemical-to-mechanical transduction that is unique to this sensing modality.