Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 135, Issue 1, Pages 298-303Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.08.026
Keywords
CuO nanowires; Thermal oxidation; Automobile ventilation; CO; NO2
Funding
- Korean government (MEST) [R0A-2008-000-20032-0]
- Ministry of Knowledge Economy, Republic of Korea [M2008010013]
- Korea Institute of Industrial Technology(KITECH) [M2008010013] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6A2001] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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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