Photoluminescence microscopy and spectroscopy of individualized and aggregated single-wall carbon nanotubes

被引：11
作者：
Schoeppler, Friedrich [1 ]
Ruehl, Nicolas [1 ]
Hertel, Tobias [1 ]
机构：
[1] Univ Wurzburg, Inst Phys & Theoret Chem, Dept Chem & Pharm, D-97074 Wurzburg, Germany
来源：
CHEMICAL PHYSICS | 2013年 / 413卷
关键词：
Carbon nanotubes; Aggregation; Time resolved; Photoluminescence; Single molecule; PARTICLE TRACKING; ENERGY;
D O I：
10.1016/j.chemphys.2012.08.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have studied photophysical properties of individual single-wall carbon nanotubes (SWNTs) and SWNT aggregates in colloidal suspensions using fluorescence microscopy, -spectroscopy and time-correlated single photon counting. The results suggest that SWNT aggregates, formed by addition of a divalent salt to a monomer SWNT suspension, have an open structure with a density of approximate to 12 SWNTs mu m (3). We also find a sizable spectral red-shift of 16 nm, line-broadening of 23 nm and reduced PL lifetimes in coagulated structures, independent of aggregate size for the range of structures studied here. Such changes may be used as fingerprint of SWNT aggregate formation in similar environments. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：112 / 115
页数：4
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