Title :
A room temperature SAW based methane gas sensors
Author :
Wen Wang ; Haoliang Hu ; Shitang He ; Yong Pan ; Caihong Zhang ; Chuang Dong
Author_Institution :
State Key Lab. of Acoust., Inst. of Acoust., Beijing, China
Abstract :
This work reports a supramolecular cryptophane-A-coated surface acoustic wave (SAW) gas sensor for methane gas detection. Two two-port SAW resonators with low insertion loss, single resonation, and high Q-value was fabricated on a same ST-X quartz substrate, and acted as the feedback element of the oscillators. A Supramolecular cryptophane-A was synthesized from vanillyl alcohol using a double trimerisation method and deposited onto one of SAW resonators via spinning method. The present gas sensor was exposed to various concentrations of CH4 gas at room temperatures. Larger sensor response and good repeatability were observed in the sensor experiment.
Keywords :
coating techniques; gas sensors; organic compounds; quartz crystal microbalances; surface acoustic wave oscillators; surface acoustic wave resonators; surface acoustic wave sensors; SAW resonator; ST- X quartz substrate; feedback element; insertion loss; methane gas detection; oscillators; room temperature SAW based methane gas sensor; spinning method; supramolecular cryptophane-A-coated SAW gas sensor; surface acoustic wave; trimerisation method; vanillyl alcohol; Frequency measurement; Gas detectors; Optical resonators; Oscillators; Stability analysis; Surface acoustic wave devices; Surface acoustic waves; Cryptophane-A; Oscillator; SAW Methane gas sensor; Two-port resonator;
Conference_Titel :
Ultrasonics Symposium (IUS), 2013 IEEE International
Conference_Location :
Prague
Print_ISBN :
978-1-4673-5684-8
DOI :
10.1109/ULTSYM.2013.0549
