Photoluminescence from Exciton Energy Transfer of Single-Walled Carbon Nanotube Bundles Dispersed in Ionic Liquids

被引：16
|
作者：
Yang, Juan [1 ]
Yang, Nuoya [1 ]
Zhang, Daqi [1 ]
Wang, Xiao [1 ]
Li, Yilun [1 ]
Li, Yan [1 ]
机构：
[1] Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Key Lab Phys & Chem Nanodevices,Coll Chem & Mol E, Beijing 100871, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 41期
关键词：
FLUORESCENCE; EFFICIENCY; RAMAN;
D O I：
10.1021/jp306515a
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：
Single-walled carbon nanotubes (SWNTs) can be dispersed into fine bundles in imidazolium-based ionic liquids (ILs) by simple mechanical grinding. Photoluminescence (PL) of the exciton energy migration from larger band gap semiconducting donor nanotubes to smaller band gap semiconducting acceptor nanotubes within the same SWNT bundle is clearly observed and can be explained by the Forster resonance energy transfer (FRET) mechanism. This offers a simple way to relatively brighten up the PL of those less populated, large diameter, small band gap SWNT species. Taking surfactant sodium dodecyl sulfate (SDS)-dispersed samples as a control of individually dispersed SWNTs, incomplete thermalization before exciton recombination is demonstrated in IL-dispersed SWNT bundles.
引用
收藏
页码：22028 / 22035
页数：8
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