Suitability of PZT ceramics for mass sensors versus widespread used quartz crystals
authors Verissimo, MIS; Mantas, PQ; Senos, AMR; Oliveira, JABP; Gomes, MTSR
nationality International
journal SENSORS AND ACTUATORS B-CHEMICAL
author keywords quartz crystals; PZT ceramics; piezoelectric substrates; mass sensors
keywords SHEAR-MODE RESONATORS; LIQUID PROPERTIES; PERFORMANCE; FREQUENCY
abstract Two piezoelectric materials, quartz and ceramic (PZT), were evaluated as mass sensors. Quartz crystals (polished and unpolished) and one ceramic (Nb-Mn-PZT) were used to detect and quantify fructose in aqueous solutions and s-butylamine in vapour. The frequencies at minimum impedance (fn), maximum impedance (fm), series resonance frequency (fs) and parallel resonance frequency (fp) were monitored. Sensitivities of the devices to the chemical compounds are compared and related to the observed changes of the electrical parameters of the equivalent circuit. Roughness of the surface of the discs (ceramic and quartz crystals) and electrodes were measured and their influence in the observed frequency responses discussed. (C) 2003 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0925-4005
year published 2003
volume 95
issue 1-3
beginning page 25
ending page 31
digital object identifier (doi) 10.1016/S0925-4005(03)00397-6
web of science category Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
subject category Chemistry; Electrochemistry; Instruments & Instrumentation
unique article identifier WOS:000185567800004
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