Investigation of the light emission efficiency of single-wall carbon nanotubes wrapped with different surfactants

被引：31

作者：

Fantini, C. ^{[1
,2
]}

Cassimiro, J. ^{[2
]}

Peressinotto, V. S. T. ^{[2
]}

Plentz, F. ^{[1
]}

Souza Filho, A. G. ^{[3
]}

Furtado, C. A. ^{[2
]}

Santos, A. P. ^{[2
]}

机构：

[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

[2] Ctr Desenvolvimento Tecnol Nucl, BR-30123970 Belo Horizonte, MG, Brazil

[3] Univ Fed Ceara, Dept Fis, BR-60455900 Fortaleza, CE, Brazil

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 473卷 / 1-3期

关键词：

INDIVIDUAL NANOTUBES; LARGE POPULATIONS; FLUORESCENCE; PHOTOLUMINESCENCE; DEPENDENCE; DISPERSION; LENGTH;

D O I：

10.1016/j.cplett.2009.02.077

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-wall carbon nanotubes dispersed in aqueous solutions of different surfactants are investigated by optical absorption and photoluminescence spectroscopies. The role played by the type of surfactant, surfactant concentration, and nanotube concentration on the efficiency of absorption and emission of light by the individualized nanotubes of different chiralities is discussed. By comparing the intensities of absorption and emission is possible to obtain the best nanotube and surfactant concentrations that optimize the light emission efficiency. Changes in the absorption and emission energies are observed and interpreted in terms of the variation of the environments screening on the exciton binding energies. (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：96 / 101

页数：6

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