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Modulated operating...
Modulated operating temperature for MOSFET gas sensors : Hydrogen recovery time reduction and gas discrimination
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- Briand, D. (author)
- Institute of Microtechnology, University of Neuchâtel, P.O. Box 3, CH-2007 Neuchâtel, Switzerland
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- Wingbrant, Helena (author)
- Linköpings universitet,Tekniska högskolan,Tillämpad Fysik
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- Sundgren, Hans (author)
- Linköpings universitet,Tekniska högskolan,Tillämpad Fysik
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- Van, der Schoot B. (author)
- Van der Schoot, B., Institute of Microtechnology, University of Neuchâtel, P.O. Box 3, CH-2007 Neuchâtel, Switzerland
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- Ekedahl, Lars-Gunnar (author)
- Linköpings universitet,Tekniska högskolan,Institutionen för fysik, kemi och biologi
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- Lundström, Ingemar (author)
- Linköpings universitet,Tekniska högskolan,Tillämpad Fysik
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- De, Rooij N.F. (author)
- De Rooij, N.F., Institute of Microtechnology, University of Neuchâtel, P.O. Box 3, CH-2007 Neuchâtel, Switzerland
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Institute of Microtechnology, University of Neuchâtel, PO. Box 3, CH-2007 Neuchâtel, Switzerland Tekniska högskolan (creator_code:org_t)
- 2003
- 2003
- English.
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In: Sensors and actuators. B, Chemical. - 0925-4005 .- 1873-3077. ; 93:1-3, s. 276-285
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- This communication presents a modulated mode of operation for MOSFET gas sensors. A low-power micromachined device allows pulsing the temperature of MOSFET gas sensors with a time constant less than 100ms. Modulating the temperature during the gas exposure modifies the kinetics of the gas reactions with the sensing film. The way the sensor response is modified by the temperature modulation depends on the sensor "history", on the nature of the surrounding gaseous atmosphere, and on the type of materials used as catalytic sensing film. Pulsing the temperature up just after the gas exposure can reduce the recovery time for specific applications, such as for hydrogen detection. Cycling the temperature can allow the discrimination between different gas mixtures. Discrimination was shown for gaseous mixtures of hydrogen and ammonia in air. The results obtained indicate that a "smart" combination of sample and temperature profile could be used to expand the information content in the sensor response. © 2003 Elsevier Science B.V. All rights reserved.
Keyword
- Gas sensor
- Low-power
- MOSFET
- Temperature modulation
- TECHNOLOGY
- TEKNIKVETENSKAP
Publication and Content Type
- vet (subject category)
- kon (subject category)
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