Abstract
The behavior of the thickness-shear mode (TSM) acoustic wave sensor under conductive liquid loading has been examined by acoustic network analysis. The response of the TSM sensor arises from the perturbation of the electrified interface, including the acoustoelectric coupling of the surface potential with ionic species and the formation of the electrical double layer. In dilute solutions, dissipation of acoustic energy resulting from acoustoelectric coupling dominates the complete energy-transfer process, which leads to a rapid decrease of the series resonant frequency and in increase in the motional resistance
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