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Indexed by:期刊论文

Date of Publication:2010-02-01

Journal:CHINESE SCIENCE BULLETIN

Included Journals:SCIE

Volume:55

Issue:4-5

Page Number:382-385

ISSN No.:1001-6538

Key Words:metal oxide semiconductors; gas sensors; SnO2; multiwalled carbon nanotubes; ethanol

Abstract:SnO2/multiwalled carbon nanotubes (MWNTs) have been studied as gas sensing materials. Compared with pure SnO2, SnO2/MWNTs exhibit improved ethanol sensing properties such as higher sensitivity and quicker response/recovery at 300A degrees C. The sensitivity is 35, 65, 166 and 243 to 500, 1000, 2000 and 3000 ppm ethanol, respectively. The response time is about 1 s, and the recovery time is about 5 s. The sensing improvement is explained in terms of the appropriate basal resistance and enhanced signal transfer brought by MWNTs.