Fabrication of Piezoelectric Thickness-Shear-Mode Acoustic Wave Sensing Device and its Application
The piezoelectric thickness-shear-mode (TSM) acoustic wave sensing device was fabricated by coating with a calixarene derivative on the surface of gold electrode of quartz crystal, then connecting with a transistor-transistor-logic (TTL) oscillator, a frequency counter and a computer. Among four coating materials, the compound of calixarene I was the most efficient active material for adsorption of carbinol molecule based on a host-guest recognition mechanism. In comparison with gas chromatography (GC) method, the calixarene based TSM device can be used for on-line determination of the poisonous carbinol vapor in the range of 0 ~ 3000 ppm around our living environment with good selectivity, reproducibility and high stability. The detection limit can be evaluated to be 1.41 ppm.
Zhengyi Jiang and Chunliang Zhang
Z. Cao et al., "Fabrication of Piezoelectric Thickness-Shear-Mode Acoustic Wave Sensing Device and its Application ", Advanced Materials Research, Vols. 97-101, pp. 4261-4264, 2010