Assignment of Chiral Vectors in Carbon Nanotubes

摘要

Double wall carbon nanotubes (DWNTs) were derived from peapods by annealing at high temperature. We report on the Raman response of the RBM of the inner tubes. As a consequence of their small diameter the Raman spectra of the inner components of the DWNTs show well distinguishable RBM lines of the different inner tubes, besides the usual response from the outer tubes. The evaluation of these spectra has led to a full assignment of the chiral vectors to the spectroscopic lines. We found v_(RBM) = 235.5 / d +13.8 · d, v in cm~(-1), d in nm.