دورية أكاديمية
Gas identification based on bias induced hysteresis of a gas-sensitive SiC field effect transistor
| العنوان: | Gas identification based on bias induced hysteresis of a gas-sensitive SiC field effect transistor |
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| المؤلفون: | M. Bastuck, C. Bur, A. Lloyd Spetz, M. Andersson, A. Schütze |
| المصدر: | Journal of Sensors and Sensor Systems, Vol 3, Iss 1, Pp 9-19 (2014) |
| بيانات النشر: | Copernicus Publications, 2014. |
| سنة النشر: | 2014 |
| المجموعة: | LCC:Technology |
| مصطلحات موضوعية: | Technology |
| الوصف: | In this work dynamic variation of gate bias is used on a gas-sensitive SiC field effect transistor ("GasFET") to optimize its sensitivity and increase its selectivity. Gate bias ramps introduce strong hysteresis in the sensor signal. The shape of this hysteresis is shown to be an appropriate feature both for the discrimination of various gases (ammonia, carbon monoxide, nitrogen monoxide and methane) as well as for different gas concentrations (250 and 500 ppm). The shape is very sensitive to ambient conditions as well as to the bias sweep rate. Thus, the influences of oxygen concentration, relative humidity, sensor temperature and cycle duration, i.e., sweep rate, are investigated and reasons for the observed signal changes, most importantly the existence of at least two different and competing processes taking place simultaneously, are discussed. Furthermore, it is shown that even for very fast cycles, in the range of seconds, the gas-induced shape change in the signal is strong enough to achieve a reliable separation of gases using gate bias cycled operation and linear discriminant analysis (LDA) making this approach suitable for practical application. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2194-8771 2194-878X |
| Relation: | http://www.j-sens-sens-syst.net/3/9/2014/jsss-3-9-2014.pdf; https://doaj.org/toc/2194-8771; https://doaj.org/toc/2194-878X |
| DOI: | 10.5194/jsss-3-9-2014 |
| URL الوصول: | https://doaj.org/article/48f080ea6c594ad88e9ef67b501a5d7e |
| رقم الأكسشن: | edsdoj.48f080ea6c594ad88e9ef67b501a5d7e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 21948771 2194878X |
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| DOI: | 10.5194/jsss-3-9-2014 |