Resonance behavior of the sensitivity of acoustic-wave chemical gas sensors |
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Authors: | L M Dorozhkin S V Boritko A V Fokin G N Dorozhkina I A Rozanov |
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Institution: | (1) Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 117907 Moscow, Russia;(2) Andreev Institute of Acoustics, Russian Academy of Sciences, ul. Shvernika 4, 117036 Moscow, Russia;(3) NIOPIK Russian Research Center, ul. Bol’shaya Sadovaya 1/4, 103787 Moscow, Russia |
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Abstract: | The effect of the resonance enhancement of the sensitivity of acoustic-wave chemical sensors is the-oretically predicted and
substantiated experimentally. This enhancement is due to the peculiarities of the excitation of standing waves in the multilayer
structure of the sensors. The obtained results provide the basis for the purposeful regulation of sensor sensitivity by selecting
their design parameters. The effect discovered also offers promise from the standpoint of methodology: at the resonance conditions,
sound velocity in the adsorbent film can be measured to a high precision. These experiments provide information on the elastic,
dielectric, viscous-flow, and other properties of film materials and on their phase composition. |
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