The dynamics of viscoelastic layered systems studied by surface acoustic wave (SAW) sensors operated in a liquid phase
Paper in proceedings, 2017

We theoretically study a three-layer continuum model of a surface acoustic wave sensor where the two overlayers are allowed to be viscoelastic. This case is particularly important in biosensing, where soft materials submerged in fluids are commonplace. From the general dispersion equation, we calculate the phase velocity shift and the wave attenuation. We show that there is a viscoelastic coupling between the overlayers which results in unintuitive behavior, e.g., the addition of viscous loading to a soft-film sensor can reduce the attenuation.

sensor modeling

viscoelasticity

acoustic sensors

Surface acoustic waves

Author

Anton Vikström

Chalmers, Physics, Condensed Matter Theory

Marina Voinova

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Procedia Technology

2212-0173 (ISSN)

Vol. 27 102-103

26th Anniversary World Congress on Biosensors (Biosensors)
Göteborg, Sweden,

Subject Categories

Applied Mechanics

Other Physics Topics

Fluid Mechanics and Acoustics

DOI

10.1016/j.protcy.2017.04.044

More information

Latest update

3/19/2018