Photoluminescence from disorder induced states in individual single-walled carbon nanotubes

被引：4
作者：
Harutyunyan, Hayk [1 ,2 ]
Gokus, Tobias [3 ,4 ]
Green, Alexander A. [5 ]
Hersam, Mark C. [5 ]
Allegrini, Maria [1 ,2 ]
Hartschuh, Achim [3 ,4 ]
机构：
[1] Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy
[2] CNISM, I-56127 Pisa, Italy
[3] Univ Munich, Dept Chem & Biochem, D-81377 Munich, Germany
[4] Univ Munich, CENS, D-81377 Munich, Germany
[5] Northwestern Univ, Dept Chem, Dept Mat Sci & Engn, Evanston, IL 60208 USA
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2009年 / 246卷 / 11-12期
基金：
美国国家科学基金会;
关键词：
FLUORESCENCE;
D O I：
10.1002/pssb.200982273
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on the generation of new low-energy photoluminescence (PL) bands in the spectra of semiconducting single-walled carbon nanotubes (SWNTs). The new bands, that are brightened because of local modifications of the nanotube structure or the metal adsorption on the SWNT surface, are attributed to PL from different nominally dark excitons that are "brightened" due to defect-induced mixing of states with different parity and/or spin. The effect of the created structural disorder on the dynamical properties of the emission is studied by time-resolved PL measurements revealing a significant reduction of the bright exciton lifetime. The lowest energy dark state has a longer lifetime and is not in thermal equilibrium with the bright state. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：2679 / 2682
页数：4
相关论文
共 24 条
[1]   Structure-assigned optical spectra of single-walled carbon nanotubes [J].
Bachilo, SM ;
Strano, MS ;
Kittrell, C ;
Hauge, RH ;
Smalley, RE ;
Weisman, RB .
SCIENCE, 2002, 298 (5602) :2361-2366
[2]   Selection rules for one- and two-photon absorption by excitons in carbon nanotubes [J].
Barros, Eduardo B. ;
Capaz, Rodrigo B. ;
Jorio, Ado ;
Samsonidze, Georgii G. ;
Souza, Antonio G. ;
Ismail-Beigi, Sohrab ;
Spataru, Catalin D. ;
Louie, Steven G. ;
Dresselhaus, Gene ;
Dresselhaus, Mildred S. .
PHYSICAL REVIEW B, 2006, 73 (24)
[3]   Luminescence decay and the absorption cross section of individual single-walled carbon nanotubes [J].
Berciaud, Stephane ;
Cognet, Laurent ;
Lounis, Brahim .
PHYSICAL REVIEW LETTERS, 2008, 101 (07)
[4]  
Berger S, 2007, NANO LETT, V7, P398, DOI 10.1021/n1062609p
[5]  
CHANG E, ARXIVCONDMAT0603085V
[6]   Stepwise quenching of exciton fluorescence in carbon nanotubes by single-molecule reactions [J].
Cognet, Laurent ;
Tsyboulski, Dmitri A. ;
Rocha, John-David R. ;
Doyle, Condell D. ;
Tour, James M. ;
Weisman, R. Bruce .
SCIENCE, 2007, 316 (5830) :1465-1468
[7]   Energetics and electronic structures of individual atoms adsorbed on carbon nanotubes [J].
Durgun, E ;
Dag, S ;
Ciraci, S ;
Gulseren, O .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (02) :575-582
[8]   Photoinduced luminescence blinking and bleaching in individual single-walled carbon nanotubes [J].
Georgi, Carsten ;
Hartmann, Nicolai ;
Gokus, Tobias ;
Green, Alexander A. ;
Hersam, Mark C. ;
Hartschuh, Achim .
CHEMPHYSCHEM, 2008, 9 (10) :1460-1464
[9]   Exciton decay dynamics in individual carbon nanotubes at room temperature [J].
Gokus, Tobias ;
Hartschuh, Achim ;
Harutyunyan, Hayk ;
Allegrini, Maria ;
Hennrich, Frank ;
Kappes, Manfred ;
Green, Alexander A. ;
Hersam, Mark C. ;
Araujo, Paulo T. ;
Jorio, Ado .
APPLIED PHYSICS LETTERS, 2008, 92 (15)
[10]   Ultracentrifugation of single-walled nanotubes [J].
Green, Alexander A. ;
Hersam, Mark C. .
MATERIALS TODAY, 2007, 10 (12) :59-60
123