Abstract Submitted to the    NANOTUBE'04 Conference:

We have synthesized well isolated single-wall carbon nanotubes (SWCNTs) embedded in supporting materials and measured resonance Raman spectra. The line width of radial breathing mode (RBM) peak is typically 1.5 cm^-1 that is much narrower than the previous value of 5 cm^-1 for the isolate SWCNTs lying on Si surface. Since the narrow RBM peak means that the phonon scattering is well suppressed, it is suggested that SWCNTs in the sample are defect less, well isolated and probably suspended. Each RBM peak showed sharp resonance effect, and then we obtained experimental optical transition energy (Eii) versus diameter plot. We calculated Eii energies by the tight-binding model considering the third neighbors and compared them with the experimental results. In the first and second optical transitions of the metallic SWCNTs, the experimental plot shows good agreement to the calculated ones. Since the chirality assignment by the photoluminescence spectra cannot be applied to metallic SWCNTs, our result will give useful information to the total chirality assignments.