Direct Growth of Single-Walled Carbon Nanotube Networks on Alumina Substrate: A Novel Route to Ultrasensitive Gas Sensor Fabrication

We explored structural and electrical properties of single-walled carbon nanotube (SWNT) networks directly grown on alumina substrates. The netlike SWNTs were uniformly grown on the substrate at a high quality. From the Raman spectroscopy analysis it was found that the as-grown SWNT networks were a...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 44; no. 11R; p. 8227
Main Authors Wongwiriyapan, Winadda, Honda, Shin-ichi, Konishi, Hirofumi, Mizuta, Tomoaki, Ohmori, Takafumi, Ito, Tatsuya, Maekawa, Toru, Suzuki, Kengo, Ishikawa, Hiroshi, Murakami, Toshiya, Kisoda, Kenji, Harima, Hiroshi, Oura, Kenjiro, Katayama, Mitsuhiro
Format Journal Article
LanguageEnglish
Published 01.11.2005
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Summary:We explored structural and electrical properties of single-walled carbon nanotube (SWNT) networks directly grown on alumina substrates. The netlike SWNTs were uniformly grown on the substrate at a high quality. From the Raman spectroscopy analysis it was found that the as-grown SWNT networks were a mixture of metallic and semiconducting SWNTs, while the SWNT networks after their electrical breakdown exhibited a predominance of the semiconducting property. The direct growth method and subsequent electrical breakdown facilitated high-throughput production of practical ultrasensitive sensors for pollutant gases with a high sensitivity, which was demonstrated by NO 2 detection.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.44.8227