A New Cryptophane A-coated SAW Methane Gas Sensor
[1]Wang Wen,Hu Haoliang,He Shitang,et al.A New Cryptophane A-coated SAW Methane Gas Sensor[J].Journal of Zhengzhou University (Engineering Science),2016,37(06):6-23.[doi:10.13705/j.issn.1671-6833.2016.03.026]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
37
Number of periods:
2016 06
Page number:
6-23
Column:
Public date:
2016-12-31
- Title:
- A New Cryptophane A-coated SAW Methane Gas Sensor
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2016.03.026
- Abstract:
- In view of the current situation that the traditional methane sensor technology is difficult to imple-ment the field detection and monitor on methane gas, a novel room-temperature SAW methane gas sensor coa-ted with cryptophane-A sensing interface is proposed by utilizing the supermolecular compound cryptophane-A’ s specific clathration to methane molecules. The sensor was composed of differential resonator-oscillators with excellent frequency stability, a supra-molecular CrypA coated along the acoustic propagation path, and a frequency acquisition module. The supramolecular CrypA was synthesized from vanillyl alcohol using a three-step method and deposited onto the surface of the sensing resonators via dropping method. Fast response and excellent repeatability were observed in gas sensing experiment, and the estimated detection limit and meas-ured sensitivity in gas dynamic range of 0 . 2% ~5% was evaluated as ~0 . 05 % and ~184 Hz/%, respec-tively. The measured results indicated the SAW sensor was promising for under-mine methane gas detection and monitor.
- References:
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