Resonant Raman scattering from single-walled nanotubes of small diameters

In this report, we present a novel purification method of single-walled nanotubes SWNTs.including their hydrothermal treatment by hydrothermally initiated dynamic extraction HIDE.process. The purity of the SWNTs increases at each step of the integrated purification process HIDE–extraction of fullerenes–oxidation–dissolution of metal particles.and the purity of the final product is over 95 wt.%. Furthermore, in order to study the detailed characterization of SWNTs, Resonant Raman scattering measurements were performed for the purified SWNTs. q1999 Published by Elsevier Science B.V. All rights reserved