Environment effects on the Raman spectra of individual single-wall carbon nanotubes: Suspended and grown on polycrystalline silicon

Hyungbin Son; Hori, Yuki; Chou, S.G.; Nezich, D.; Sansonidze, Ge.G; Dresselhaus, G.; Dresselhaus, M.S.; Barros, Eduardo B.
November 2004
Applied Physics Letters;11/15/2004, Vol. 85 Issue 20, p4744
Academic Journal
An enhanced Raman signal is observed from individual suspended single-wall carbon nanotubes (SWNTs) and from isolated SWNTs grown on an n-doped polycrystalline silicon film used in standard silicon processing. The radial breathing modes of the Raman spectra taken from suspended SWNTs exhibit narrow linewidths, which indicate a relatively unperturbed environment for suspended SWNTs. Clear Raman signals from intermediate frequency modes in the frequency range from 520 to 1200 cm-1 are presented, which might allow a detailed study of the phonon band structure of individual SWNTs.


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