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Nano Lett. 2010 May 12;10(5):1595-9. doi: 10.1021/nl9039845.

Surfactant-dependent exciton mobility in single-walled carbon nanotubes studied by single-molecule reactions.

Author information

1
Department of Chemistry and Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, USA.

Abstract

Measurements of stepwise photoluminescence quenching in individual, (n,m)-selected single-walled carbon nanotubes (SWCNTs) undergoing chemical reaction have been analyzed to deduce mobilities of optically generated excitons. For (7,5) nanotubes, the mean exciton range varies between approximately 140 and 240 nm for different surfactant coatings and correlates weakly with nanotube PL intensity. The results are consistent with a model of localized SWCNT excitons having substantial diffusional mobility along the nanotube axis.

PMID:
20377240
DOI:
10.1021/nl9039845
[Indexed for MEDLINE]

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