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  • Title: Acoustic Plate Mode sensing in liquids based on free and electrically shorted plate surfaces.
    Author: Anisimkin VI, Caliendo C, Verona E.
    Journal: Ultrasonics; 2016 May; 68():29-32. PubMed ID: 26901669.
    Abstract:
    The sensing behavior to liquids for Acoustic Plate Modes (APMs) propagating along 64°Y, 90°X LiNbO3 plate was investigated vs. two electric boundary conditions. The changes in the APMs phase velocity and attenuation were measured upon exposure to different liquids wetting one of the surfaces of the plate, either free or electrically shorted by a thin conductive Al layer. The experimental data confirm that the presence of a metallic layer covering one of the plate surfaces affects the viscosity and temperature sensitivity of the device. The differences between the sensor response for various liquids, with free or metalized faces, are interpreted in terms of the APM polarization.
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