Signal oscillations of a piezoelectric quartz crystal in liquids caused by compressional waves

被引：17

作者：

Bund, A ^{[1
]}

Schwitzgebel, G ^{[1
]}

机构：

[1] Univ Saarlandes, D-66123 Saarbrucken, Germany

来源：

ANALYTICA CHIMICA ACTA | 1998年 / 364卷 / 1-3期

关键词：

quartz crystal microbalance (QCMB); thickness-shear mode (TSM) sensors; signal oscillations; compressional waves in liquids;

D O I：

10.1016/S0003-2670(98)00201-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Fluctuations in the signal of a piezoelectric quartz crystal in water and methanol are described as resonance effects of compressional waves. The evaporation of the fluid layer, which acts as a resonant cavity, is modelled on the laws of diffusion. Measurements were performed on 10 MHz AT-cut quartz crystals by the network analysis method, which allows the resonance frequency shift and the resonance damping to be studied separately. Periodic oscillations of both signals between 1 and 10 ppm were observed. The wavelengths of the compressional waves, calculated from the periodicity of the signals, were in good agreement with theoretical values. (C) 1998 Elsevier Science B.V.

引用

页码：189 / 194

页数：6

共 19 条

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