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Enhancing detection sensitivity of piezoelectric plate sensor by increasing transverse electromechanical coupling constant
Journal article   Open access   Peer reviewed

Enhancing detection sensitivity of piezoelectric plate sensor by increasing transverse electromechanical coupling constant

Wei Wu, Wan Y. Shih and Wei-Heng Shih
Journal of applied physics, v 114(6), p64505
14 Aug 2013
DOI: https://doi.org/10.1063/1.4817762
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://doi.org/10.1063/1.4817762View
Published, Version of Record (VoR)Maybe Open Access (Publisher Bronze),  Open

Abstract

Physical Sciences Physics Physics, Applied Science & Technology
In this study, we examined how the materials' properties of a lead magnesium niobate-lead titanate solid solution, [Pb(Mg1/3Nb2/3)O-3](0.63)[PbTiO3](0.37) (PMN-PT) piezoelectric plate sensor (PEPS) affected the enhancement of the relative detection resonance frequency shift, -Delta f/f of the sensor, where f and Delta f were the resonance frequency and resonance frequency shift of the sensor, respectively. Specifically, the electromechanical coupling constant, -k(31), of the PMN-PT PEPS was varied by changing the grain size of the piezoelectric layer as well as by applying a bias direct current electric field. Detection of streptavidin at the same concentration was carried out with biotin covalently immobilized on the surface of PEPS. It is shown that the -Delta f/f of the same streptavidin detection was increased by more than 2-fold when the -k(31) increased from 0.285 to 0.391. (C) 2013 AIP Publishing LLC.

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9 citations in Web of Science
6 citations in Scopus

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Web of Science research areas
Physics, Applied
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