Surfactant-Dependent Exciton Mobility in Single-Walled Carbon Nanotubes Studied by Single-Molecule Reactions

被引：80

作者：

Siitonen, Anni J. ^{[1
,2
,3
]}

Tsyboulski, Dmitri A. ^{[1
,2
]}

Bachilo, Sergei M. ^{[1
,2
]}

Weisman, R. Bruce ^{[1
,2
]}

机构：

[1] Rice Univ, Dept Chem, Houston, TX 77005 USA

[2] Rice Univ, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA

[3] Univ Jyvaskyla, Nanosci Ctr, Dept Chem, FIN-40014 Jyvaskyla, Finland

来源：

NANO LETTERS | 2010年 / 10卷 / 05期

关键词：

SWCNT; carbon nanotubes; exciton diffusion; photoluminescence quenching; FLUORESCENCE;

D O I：

10.1021/nl9039845

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

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 similar to 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.

引用

页码：1595 / 1599

页数：5

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