Chirality assignments in carbon nanotubes based on resonant Raman scattering

摘要

Resonant Raman scattering is a well-known method for investigating the optical transitions in solids [1]. Here we show that the fully symmetric radial breathing mode (RBM) of carbon nanotubes can be used to derive an assignment of their chiral indices. Our assignment is based on a plot of the resonance maxima for the radial breathing modes as a function of laser excitation energy versus inverse omega(RBM), a so-called Kataura plot. Different from recent luminescence measurements [2], the chirality of both semiconducting and metallic nanotubes can be investigated. (c) 2005 WILEY-VCH Verlag GmbH & Co. KG&A, Wembeim.