Soft-film dynamics of SH-SAW sensors in viscous and viscoelastic fluids
Artikel i vetenskaplig tidskrift, 2016

We theoretically investigate surface acoustic waves with horizontal polarization (SH-SAWs) propagating in a three-layer system consisting of an elastic substrate and two viscoelastic overlayers. For the limiting case of an acoustically thin middle layer and an infinite top layer, we derive analytical expressions for the phase velocity shift and the wave attenuation. These expressions demonstrate the importance of taking into account the viscoelastic coupling between the two overlayers. Numerical calculations using a combined Maxwell/Voigt scheme confirm our analytical results and also indicate that it is possible for viscoelasticity to cause SH-SAWs to vanish.

SH-SAW sensor

Viscoelasticity

Surface acoustic wave

Sensor modeling

Acoustic sensor

Författare

Anton Vikström

Chalmers, Fysik, Kondenserade materiens teori

Marina Voinova

Göteborgs universitet

Sensing and Bio-Sensing Research

2214-1804 (eISSN)

Vol. 11 78-85

Ämneskategorier

Fysik

DOI

10.1016/j.sbsr.2016.08.004