Coating methods acoustic wave

Grate, J.W. Patrash, S.J. Abraham, M.H., Method for estimating polymer-coated acoustic-wave vapor sensor responses, Analytical Chemistry 1995, 67, 2162-2169. 

Another important area where gold-thiol monolayers might find promising applications is gas- and biosensing. Simple sensors sensitive to certain types of compounds, based on such detection methods as surface plasmon resonance or surface acoustic wave, have been described454,455,531-533. This type of device is usually made of a gold plate coated with a functionalized monolayer. The terminal functional group of such a monolayer is responsible for selective interactions with the analyte, and adsorption of the latter is then detected by the appropriate method. 

The observed glass transition temperatures (T ) of several thin polymer films on surface acoustic wave (SAW) devices are 50-60 °C higher than the results reported using other methods such as DSC. The increase in the onset of T is the result of interaction of the high frequency SWJ with the polymer film, consistent with the time-temperature superposition principle. The Tj were identified as localized minima in the frequency curves, or by changes in the slope of the curves, as the coated sensors were heated between 35-110 °C. Potential applications of SAWs for the characterization of polymer materials and the Implications of these findings for the interpretation of SAW data are discussed. 

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