Highly Sensitive Detection of Carbon Monoxide at Room Temperature Using Platinum-Decorated Single-Walled Carbon Nanotubes
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概要
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We demonstrated highly sensitive detection of carbon monoxide (CO) down to 1 ppm at room temperature using platinum-decorated single-walled carbon nanotubes (Pt-SWNTs). The obtained sensitivity to CO was 3--4 orders higher than the values reported for functionalized SWNTs, and was achieved by the controlled deposition of Pt nanoparticles on SWNTs. For 1--10 ppm of CO, the sensor response linearly increased with CO concentration, affording the quantitative detection of CO in a low-concentration range. Furthermore, Pt-SWNTs exhibited detection selectivity to CO against H2. The sensing mechanism was attributed to electron donation to the SWNTs as a result of CO oxidation on the Pt catalyst surface.
- 2008-01-25
著者
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Shimazaki Ryotaro
New Cosmos Electric Co. Ltd.
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Ito Tatsuya
New Cosmos Electric Co. Ltd.
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Suzuki Kengo
New Cosmos Electric Co. Ltd.
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Wongwiriyapan Winadda
Division Of Electrical Electronic And Information Engineering Graduate School Of Engineering Osaka U
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Maekawa Toru
New Cosmos Electric Co. Ltd.
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Inoue Satoshi
Division Of Electrical Electronic And Information Engineering Graduate School Of Engineering Osaka U
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Honda Shin-ichi
Division Of Electrical Electronic And Information Engineering Graduate School Of Engineering Osaka U
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Katayama Mitsuhiro
Division Of Electrical Electronic And Information Engineering Graduate School Of Engineering Osaka U
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Ishikawa Hiroshi
New Cosmos Electric Co. Ltd.
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Oura Kenjiro
Research Center for Ultra High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Wongwiriyapan Winadda
Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Maekawa Toru
New Cosmos Electric Co., Ltd., 3-6-25 Mitsuya-naka, Yodokawa-ku, Osaka 532-0036, Japan
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Suzuki Kengo
New Cosmos Electric Co., Ltd., 3-6-25 Mitsuya-naka, Yodokawa-ku, Osaka 532-0036, Japan
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Ito Tatsuya
New Cosmos Electric Co., Ltd., 3-6-25 Mitsuya-naka, Yodokawa-ku, Osaka 532-0036, Japan
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