Raman spectroscopy of iodine-doped double-walled carbon nanotubes

Details Raman spectroscopy of iodine-doped double-walled carbon nanotubes Raman spectroscopy of iodine-doped double-walled carbon nanotubes

2004-10-26

arxiv.org/abs/cond-mat/0410664v1

Physical Review B 69 (2004) 235422

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevB.69.235422

We present a Raman spectroscopy study of iodine-intercalated (p-type-doped) double-walled carbon nanotubes. Double-walled carbon nanotubes (DWCNTs) are synthesized by catalytic chemical vapor deposition and characterized by Raman spectroscopy. The assignment of the radial breathing modes and the tangential modes of pristine DWCNTs is done in the framework of the bond polarization theory, using the spectral moment method. The changes in the Raman spectrum upon iodine doping are analyzed. Poly-iodine anions are identi- fied, and the Raman spectra reveal that the charge transfer between iodine and DWCNTs only involves the outer tubes.

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