Abstract
Stokes and anti‐Stokes Resonance Raman experiments on carbon nanotubes using a tunable laser system are reported. Both arc discharge and HiPco samples are investigated with laser excitation energies varying continuously from 1.6eV up to 2.7eV. The usual features, i.e., the RBM, D‐band and G‐band are analyzed, as well as the intermediate frequency modes (IFMs) appearing between the RBM and the D/G band spectral region. The results are analyzed based on electron and phonon structure. Step‐like dispersive behavior is observed for the IFMs and this anomalous result is analyzed based on Raman selection rules plus quantum confinement of electrons and phonons. An experimental determination of the van Hove singularity energies Eii is compared with photoluminescence results. The single versus double resonance nature of the G band SWNT spectra is briefly addressed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
