Acoustic Plate Mode sensing in liquids based on free and electrically shorted plate surfaces

V I Anisimkin; C Caliendo; E Verona

doi:10.1016/j.ultras.2016.02.007

Acoustic Plate Mode sensing in liquids based on free and electrically shorted plate surfaces

Ultrasonics. 2016 May:68:29-32. doi: 10.1016/j.ultras.2016.02.007. Epub 2016 Feb 12.

Authors

V I Anisimkin¹, C Caliendo², E Verona³

Affiliations

¹ Kotel'nikov Institute of Radio Engineering & Electronics, Russian Academy of Sciences (IRE-RAS), Mokhovay Str., 11/7, 125009 Moscow, Russia.
² Institute of Acoustics and Sensors, Italian National Research Council (IDASC-CNR), Via del Fosso del Cavaliere, 100 I-00133 Roma, Italy.
³ Kotel'nikov Institute of Radio Engineering & Electronics, Russian Academy of Sciences (IRE-RAS), Mokhovay Str., 11/7, 125009 Moscow, Russia; Institute for Photonics and Nanotechnologies, Italian National Research Council (IFN-CNR), Via Cineto Romano, 42, I-00156 Roma, Italy.

PMID: 26901669
DOI: 10.1016/j.ultras.2016.02.007

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.

Keywords: Acoustic Plate Modes; LiNbO(3); Liquid-phase sensors; SAW sensors; Viscosity sensor.

MeSH terms

Acoustics*
Electricity
Metals
Temperature
Viscosity

Substances

Metals