Phonon-Assisted Excitonic Recombination Channels Observed in DNA-Wrapped Carbon Nanotubes Using Photoluminescence Spectroscopy
Abstract
By using a sample of DNA-wrapped single-wall carbon nanotubes strongly enriched in the (6,5) nanotube, photoluminescence emissions observed at special excitation energy values were identified with specific mechanisms of phonon-assisted excitonic absorption and recombination processes associated with (6,5) nanotubes, including one-phonon, two-phonon, and some continuous-luminescence processes. Such detailed processes are not separately identified in three-dimensional semiconducting materials. A general theoretical framework is presented to interpret the experimentally observed phonon-assisted processes in terms of excitonic states.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2005
- DOI:
- 10.1103/PhysRevLett.94.127402
- Bibcode:
- 2005PhRvL..94l7402C
- Keywords:
-
- 78.30.Na;
- 78.66.Tr;
- 81.05.Tp;
- Fullerenes and related materials;
- Fullerenes and related materials;
- Fullerenes and related materials