Radiation damage and Raman vibrational modes of single-walled carbon nanotubes

Raman scattering for the radial and tangential vibrational modes of single-walled carbon nanotubes (CNT) with different absorption doses of high-energy electron irradiation were explored. New vibrational modes both for the armchair and zigzag CNT appear and a substantial change in the intensities and broadening are observed for the high-frequency Raman bands with high absorption doses.