Probing exciton propagation and quenching in carbon nanotubes with near-field optical microscopy

被引：30

作者：

Georgi, Carsten ^{[1
,2
]}

Boehmler, Miriam ^{[1
,2
]}

Qian, Huihong ^{[1
,2
]}

Novotny, Lukas ^{[3
]}

Hartschuh, Achim ^{[1
,2
]}

机构：

[1] Univ Munich, Dept Chem & Biochem, D-81377 Munich, Germany

[2] Univ Munich, CENS, D-81377 Munich, Germany

[3] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2009年 / 246卷 / 11-12期

关键词：

ELECTRONIC-STRUCTURE; FLUORESCENCE;

D O I：

10.1002/pssb.200982306

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on near-field optical imaging of single-walled carbon nanotubes (SWNTs), observing photoluminescence (PL) quenching at nanotube ends and defects. The extension of reduced PL reflects the exciton diffusion length of about 100 nm, which can be directly visualized with our technique. Additionally, we model the complete imaging process, including exciton diffusion and tip-induced rate enhancement, for a deeper understanding of the experimental data and the determination of, e.g. diffusion length and tip enhancement from near-field PL images. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2683 / 2688

页数：6

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