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CuO nanowire gas sensors for air quality control in automotive cabin
- Issue Date
- 10-12월-2008
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- CuO nanowires; Thermal oxidation; Automobile ventilation; CO; NO2
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.135, no.1, pp.298 - 303
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 135
- Number
- 1
- Start Page
- 298
- End Page
- 303
- ISSN
- 0925-4005
- Abstract
- CuO nanowires (NWs) were grown by the thermal oxidation of Cu foil at 400 degrees C and gas sensors were fabricated by the deposition of a solution containing the CuO NWs. At 300-370 degrees C, the sensor resistance increased upon exposure to 30-100 ppm CO. This has been explained by the gas sensing characteristics of the p-type oxide semiconductor. In contrast, the sensor showed two opposite NO2 sensing behaviors; the resistance decreased upon exposure to 30-100 ppm NO2. but increased upon contact with <= 5 ppm NO2. The increase in resistance upon contact with both reducing CO and a low concentration of oxidizing NO2 gases provides a simple and novel sensing algorithm for air quality control in automotive cabins. (c) 2008 Elsevier B.V. All rights reserved.
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