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Abstract
Resistive gas sensors are very popular and relatively inexpensive; they can operate at elevated or room temperature for years on end. The main disadvantage of resistive gas sensors is their limited selectivity and sensitivity, but various methods have been applied to improve their behavior. The composition of the porous gas sensing layer, or changes in the sensor’s operating temperature, can enhance the gas detection ability. Furthermore, emerging technologies can increase the area of the active surface and advance the sensors’ sensitivity as well. Another improvement can be reached by employing low-frequency resistance fluctuations rather than DC resistance alone. That technique, called fluctuation enhanced sensing (FES), was developed about two decades ago and has been investigated with regard to different gas sensing layers. The present paper gives an overview over various experimental results and confirms improved gas detection and elucidates practical aspects connected with the FES method.
Authors (5)
-
Umut Cindemir
- Uppsala University, Sweden Department of Engineering Sciences
-
Claes Goran Granqvist
- Uppsala University, Sweden Department of Engineering Sciences
-
Cristhian Duran
- University of Pamplona, Colombia Department of Electrical, Electronics, Systems and Telecommunications
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Details
- Category:
- Conference activity
- Type:
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Title of issue:
- Nanotechnology for Instrumentation and Measurement Workshop, Nanofim 2016 strony 53 - 58
- Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Smulko J., Trawka M., Cindemir U., Granqvist C., Duran C.: Resistive gas sensors – Perspectives on selectivity and sensitivity improvement// Nanotechnology for Instrumentation and Measurement Workshop, Nanofim 2016/ : , 2016, s.53-58
- Verified by:
- Gdańsk University of Technology
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