Raman Scattering of Single-Walled Carbon Nanotubes in Early Growth Stages Using Laser-Irradiated Chemical Vapor Deposition
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概要
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We have investigated the characteristics of single-walled carbon nanotubes (SWNTs) in early stages of growth by laser-irradiated chemical vapor deposition (LICVD) using an Ar-ion laser as a source of heat. Raman scattering spectroscopy measurements reveal that in the growth stages by LICVD, SWNTs with small diameters were mainly synthesized, while SWNTs with larger diameters were grown in a longer irradiation time. These phenomena were explained by the changes in catalyst nanoparticle size during the LICVD process. Suppressing the migration and coalescence of catalyst nanoparticles by pulsed post irradiation, the growth of only SWNTs with small diameters was promoted by pulsed post irradiation subsequent to catalyst nanoparticle formation in the early stages of growth by LICVD.
- 2010-06-25
著者
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Ohno Yasuhide
The Institute Of Scientific And Industrial Research Osaka University
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Inoue Koichi
The Institute For Solid State Physics University Of Tokyo
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Kenzo Maehashi
The Institute Of Scientific And Industrial Research Osaka University
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Koichi Inoue
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Kazuhiko Matsumoto
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Tsuji Tomoki
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Tomoki Tsuji
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Kenzo Maehashi
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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