Multi-Excitation-Laser Raman Analysis of Chirality-Controlled Single-Walled Carbon Nanotubes with Free Electron Laser Irradiation during Growth
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概要
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Single-walled carbon nanotubes (SWNTs) were fabricated by chemical vapor deposition using alcohol as a feeding gas of carbon. From the results of Raman spectroscopy with four kinds of exciting laser and consideration of chirality using the Kataura plot and chirality map, we found that the SWNTs grew with sizes from 0.92 to 1.41 nm in diameter, the possible chirality of which was 30. Metallic and semiconducting SWNTs grew. However, when irradiating 800 nm free-electron laser (FEL) during growth, the SWNTs of 1.1 nm diameter grew with a reduced possible chirality of 5, the electric property of which could be semiconducting. We revealed that the irradiation of FEL was effective to control the chirality of SWNTs to achieve ultrahigh-dense field effect devices.
- 2011-01-25
著者
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Takeshita Hiroaki
Department of Cardiology, Tsukazaki Hospital
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Yajima Hirofumi
Department Of Applied Chemistry Faculty Of Science Science University Of Tokyo
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Iwata Nobuyuki
Department Of Electronics & Computer Science College Of Science & Technology Nihon Universit
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SAKAI Keijiro
Department of Electronics & Computer Science, College of Science & Technology, Nihon University
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Yamamoto Hiroshi
Departmemt Of Chemical Engineering University Of Tokyo
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Sakai Keijiro
Department of Electronics and Computer Science, College of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi, Chiba 274-8501, Japan
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Yajima Hirofumi
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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Kaneki Kunihide
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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Takeshita Hiroaki
Department of Electronics and Computer Science, College of Science and Technology, Nihon University, 7-24-1 Narashinodai, Funabashi, Chiba 274-8501, Japan
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