Phonon-assisted excitonic recombination channels observed in DNA-wrapped carbon nanotubes using photoluminescence spectroscopy |
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| Authors: | Chou S G Plentz F Jiang J Saito R Nezich D Ribeiro H B Jorio A Pimenta M A Samsonidze Ge G Santos A P Zheng M Onoa G B Semke E D Dresselhaus G Dresselhaus M S |
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| Affiliation: | Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. |
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| 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. |
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