Issue
EPL
Volume 77, Number 2, January 2007
Article Number 28003
Number of page(s) 3
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/77/28003
Published online 19 January 2007
EPL, 77 (2007) 28003
DOI: 10.1209/0295-5075/77/28003

A new mass sensor based on thickness-twist edge modes in a piezoelectric plate

J. S. Yang1, 2 and A. K. Soh3

1  Key Laboratory for Advanced Materials and Rheological Properties of Ministry of Education, Xiangtan University Xiangtan, Huanan 411105, PRC
2  Department of Engineering Mechanics, University of Nebraska - Lincoln, NE 68588, USA
3  Department of Mechanical Engineering, The University of Hong Kong - Hong Kong


received 10 August 2006; accepted in final form 22 November 2006; published January 2007
published online 19 January 2007

Abstract
We propose a new mass sensor based on thickness-twist edge modes in a piezoelectric plate of 6 mm crystals. By performing a theoretical analysis, a simple expression of sensitivity is obtained. The proposed sensor has an important advantage in the sense that it can be mounted away from the edge of the plate where the motion is insignificant and, thus, the operation of the device is unaffected.

PACS
85.50.-n - Dielectric, ferroelectric, and piezoelectric devices .

© Europhysics Letters Association 2007