Vanishing of the Breit-Wigner-Fano component in individual single-wall carbon nanotubes.
In order to decide definitely on the dependence of the intensity of the Breit-Wigner-Fano (BWF) component with the size of the bundle, we have measured the radial breathing modes and tangential modes (TMs) of well defined metallic individual single-wall carbon nanotubes (SWCNTs) and individual SWCNT bundles. In this aim, a complete procedure including the preparation of the substrates, the sample preparation, atomic-force-microscopy imaging and Raman spectroscopy has been developed. From this procedure, we show unambiguously that the BWF component vanishes in isolated metallic SWCNTs. In other words, the observation of a BWF component in the TM bunch is an intrinsic feature of the metallic SWCNT bundle.
Paillet
M
M
Groupe de Dynamique des Phases Condensées, UMR CNRS 5581, Université Montpellier II, 34095 Montpellier Cedex 5, France.
Poncharal
Ph
P
Zahab
A
A
Sauvajol
J-L
JL
Meyer
J C
JC
Roth
S
S