Abstract
Photoluminescence (PL) dynamics in single-walled carbon nanotubes (SWNTs) has been studied by the femtosecond excitation correlation method with a 150 fs time resolution. The SWNT samples were synthesized by different methods and suspended in gelatin films or solutions. The PL dynamics of SWNTs depends on the local environment surrounding the SWNTs rather than the synthesis methods. The very weak temperature dependence of and the environment-dependent reveal that the PL relaxation process is dominated by the interplay between free excitons and weakly localized excitons.
- Received 3 September 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.257401
©2006 American Physical Society