On the determination of diameter distribution in multi-wall carbon nanotubes by Raman spectroscopy: issues related to excitation laser energy (pages 1018–1023)
S. Scalese, V. Scuderi, S. Bagiante, I. Deretzis, A. La Magna, C. Bongiorno, G. Compagnini, S. Gibilisco, N. Piluso and V. Privitera
Article first published online: 22 DEC 2011 | DOI: 10.1002/jrs.3139
Multi-wall carbon nanotubes (MWCNT) produced by the arc discharge between two graphite rods in liquid nitrogen have been investigated with the use of Raman spectroscopy and transmission electron microscopy (TEM). The effect of the applied voltage on the MWCNTs has been observed, in particular, as it concerns the size of the innermost and outermost diameters. The apparent discrepancies between the Raman and TEM results and the observation of a selective response of the MWCNTs to the excitation laser energy, similar to the case of single-wall CNTs, are explained by electronic structure calculation.