Temperature Dependence of Raman Scattering from Single-Walled Carbon Nanotubes: Undefined Radial Breathing Mode Peaks at High Temperatures
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概要
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We measured the Raman scatterings from various single-walled carbon nanotube (SWNT) samples over a wide temperature range (4–1000 K). The G-band peaks showed a clear temperature dependence, namely, decrease in the Raman shift frequency and broadening of the peak width as temperature increases. The main G-band peak (G+ peak) showed universal temperature dependence in Raman shift for the various SWNT samples and for the three excitation laser wavelengths (488.0, 514.5, and 632.8 nm), although the G-band features changed depending on the SWNT samples and excitation laser wavelengths owing to the resonance Raman effects. The Raman shift, peak width, and intensity of the radial breathing mode (RBM) peaks also exhibited temperature dependence. At high temperatures, undefined RBM peaks appeared, which could not be assigned to specific chiralities, and showed opposite temperature dependence in their intensities. The intensities of the RBM peaks are strongly enhanced by the resonance Raman effects, and the temperature may change the resonance Raman conditions.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-04-25
著者
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Miyauchi Yuhei
Department Of Mechanical Engineering The University Of Tokyo
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Murakami Yoichi
Department Of Chemical System Engineering Graduate School Of Engineering The University Of Tokyo
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Maruyama Shigeo
Department Of Internal Medicine Gotsu General Hospital
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Chiashi Shohei
Department Of Mechanical Engineering The University Of Tokyo
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Murakami Yoichi
Department of Mechanical Engineering, School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Chiashi Shohei
Department of Physics, School of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Maruyama Shigeo
Department of Mechanical Engineering, School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Miyauchi Yuhei
Department of Mechanical Engineering, School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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