Chemical Treatment Enhanced Gas Sensitivity Properties of Carbon Nanotubes

The gas sensitivity properties of carbon nanotubes were investigated. The carbon nanotubes in this study were fabricated by hot filament chemical vapor deposition using Ni/Fe catalyst. The sensor samples were treated by chemical etching using H2SO4/HNO3. The experimental results have shown that the...

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Bibliographic Details
Published inJournal of Metastable and Nanocrystalline Materials Vol. 23; pp. 281 - 284
Main Authors Wang, W.L., Liao, K.J., Cai, C., Wan, B.Y., Hu, C.G.
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.01.2005
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Summary:The gas sensitivity properties of carbon nanotubes were investigated. The carbon nanotubes in this study were fabricated by hot filament chemical vapor deposition using Ni/Fe catalyst. The sensor samples were treated by chemical etching using H2SO4/HNO3. The experimental results have shown that the electrical resistance of carbon nanotubes was sensitively changed on exposure to gaseous ambient containing ethanol and water vapor. It was found that the gas sensitivity of carbon nanotubes was greatly enhanced after chemical treatment. It was also shown that the response time of nanotube sensor was faster than that of usual sensors.
ISSN:2297-6620
1422-6375
2297-6620
1662-9752
DOI:10.4028/www.scientific.net/JMNM.23.281