Zou, Yonggang and Liu, Bingbing and Yao, Mingguang and Hou, Yuanyuan and Wang, Lin and Yu, Shidan and Wang, Peng and Li, Bing and Zou, Bo and Cui, Tian and Zou, Guangtian and Wagberg, T. and Sundqvist, B. (2007) Raman spectroscopy study of carbon nanotube peapods excited by near-IR laser under high pressure. PHYSICAL REVIEW B, 76 (19).
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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.76.195417
A resonant Raman spectroscopy study has been carried out under high pressure, using a diamond anvil cell, on carbon nanotube peapods (C-60@SWNT) synthesized in high yield in our laboratory. The Raman signal was excited by a near IR laser (830 nm) to avoid photopolymerization of C-60 and thus obtain the intrinsic vibrational information on the C-60 molecules in the nanotubes. It is found that the surrounding tubes create an effective pressure on the encapsulated C-60 due to tube-fullerene interactions, resulting in a shift of the intrinsic A(g)(2) vibrational mode to 1474 cm(-1) at ambient pressure. High pressure Raman spectroscopy indicates that (C-60)(2) dimers form near 1 GPa, and that a further polymerization of C-60 occurs near 23 GPa, creating linear chains of covalently linked C-60 molecules in the tubes.
|Subjects:||Analytical Science > Microscopy and probe methods|
Material Science > Functional and hybrid materials
Physical Science > Nano objects
|Deposited By:||Farnush Anwar|
|Deposited On:||09 Jan 2009 12:49|
|Last Modified:||22 Jan 2009 16:10|
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