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Raman spectroscopy study of carbon nanotube peapods excited by near-IR laser under high pressure
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2007 (Swedish)In: Physical Review B, ISSN 0163-1829, Vol. 76, no 19, 195417- p.Article in journal (Refereed) Published
Abstract [sv]

A resonant Raman spectroscopy study has been carried out under high pressure, using a diamond anvil cell,

on carbon nanotube peapods (C60@SWNT) synthesized in high yield in our laboratory. The Raman signal was

excited by a near IR laser (830 nm) to avoid photopolymerization of C60 and thus obtain the intrinsic vibrational

information on the C60 molecules in the nanotubes. It is found that the surrounding tubes create an

effective pressure on the encapsulated C60 due to tube-fullerene interactions, resulting in a shift of the intrinsic

Ag(2) vibrational mode to 1474 cm−1 at ambient pressure. High pressure Raman spectroscopy indicates that

(C60)2 dimers form near 1 GPa, and that a further polymerization of C60 occurs near 23 GPa, creating linear

chains of covalently linked C60 molecules in the tubes.

Place, publisher, year, edition, pages
2007. Vol. 76, no 19, 195417- p.
Keyword [en]
C60, peapods, C60@SWNT, carbon nanotube, high pressure, Raman scattering, IR excitation, dimer, polymer, linear chain
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-17934DOI: 10.1103/PhysRevB.76.195417OAI: oai:DiVA.org:umu-17934DiVA: diva2:157607
Note

Selected for Virtual Journal of Nanoscale Science and Technology, volume 16, issue 22, 26th November 2007.

Available from: 2007-11-27 Created: 2007-11-27 Last updated: 2015-09-28Bibliographically approved

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Yao, MingguangWågberg, ThomasSundqvist, Bertil
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