A theoretical study of acoustic plate modes as biosensing elements

Author

Andle, J.C. ; Vetelino, J.F. ; Josse, F.

Author_Institution

Dept. of Electr. Eng., Maine Univ., Orono, ME, USA

fYear

1991

fDate

8-11 Dec 1991

Firstpage

285

Abstract

Shear horizontal acoustic plate model (SH-APM) devices have recently been used as sensing elements, both in biosensor applications and for the physical measurement of fluid properties. Properly designed APM sensors are more sensitive than quartz crystal microbalance (QCM) sensors and suffer much lower attenuation under fluid loading than surface acoustic wave (SAW) sensors. The theory of APMs in a fluid-loaded plate is discussed, and the perturbation of the APMs due to a thin film at the solid-fluid boundary which, in the case of a biosensor, may arise from antibody-antigen reactions or DNA hybridization is described. Typical results are presented for ZX LiNbO ₃ and ST-X quartz and are compared with experimental results

Keywords

biosensors; lithium compounds; quartz; surface acoustic wave devices; LiNbO₃; SiO₂; acoustic plate modes; attenuation; biosensing elements; fluid loading; shear horizontal acoustic plate model; surface acoustic wave; Acoustic applications; Acoustic devices; Acoustic measurements; Acoustic sensors; Acoustic waves; Attenuation; Biosensors; Surface acoustic wave devices; Surface acoustic waves; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1991. Proceedings., IEEE 1991

Conference_Location

Orlando, FL

Type

conf

DOI

10.1109/ULTSYM.1991.234171

Filename

234171