期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 236, 期 -, 页码 554-564出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.06.048
关键词
Microwave transduction; Ammonia sensing; Titanium dioxide; Transmission measurement; Broadband measurement
资金
- Regional Council of Bourgogne Franche-Comte
- PARI program: MATERIAUX
This work presents new developments in the microwave transduction and its application to gas sensors. Microwave measurements were extended to reflection/transmission coefficients through the use of a microstrip interdigital capacitor design. A sensitive layer composed of commercial TiO2 nanoparticles was deposited on the sensor surface, in order to detect the ammonia target gas. A complete analysis methodology is proposed. It allows to identify without ambiguity all the sensor frequencies of interest, as well as a full characterization of usual gas sensor parameters such as reproducibility, stability, response time, etc. Furthermore, it involves a new method of representation which significantly limits the amount of unexploited data collected during microwave measurements. The proposed sensor exhibits a strong correlation between response values and injected ammonia concentration between 100 and 500 ppm, with a good reversibility and stability of the measure. (C) 2016 Elsevier B.V. All Rights reserved.
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