Journal
NANOTECHNOLOGY
Volume 18, Issue 14, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/18/14/145506
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P-type CuO nanorods were synthesized by a hydrothermal method and the ethanol-sensing properties of sensors based on CuO were investigated. The sensor resistance increased when it was exposed to ethanol and decreased in the air, which is contrary to the case for sensors realized from n-type semiconductor. The resistance of the CuO-based sensor was about 2 k Omega in air and 6 k Omega in ethanol vapour with concentration of 2000 ppm. Such a sensing property is attributed to surface accumulation conduction. Sensors based on CuO nanorods have potential applications in detecting ethanol in low concentration.
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