Optical properties of carbon nanotubes in a composite material: The role of dielectric screening and thermal expansion

被引：30

作者：

Berger, S. ^{[1
]}

Iglesias, F. ^{[1
]}

Bonnet, P. ^{[1
]}

Voisin, C. ^{[1
]}

Cassabois, G. ^{[1
]}

Lauret, J. -S. ^{[2
]}

Delalande, C. ^{[1
]}

Roussignol, P. ^{[1
]}

机构：

[1] Univ Paris Diderot, Univ Paris 06, CNRS, Ecole Normale Super,Lab Pierre Aigrain,UMR 8551, Paris, France

[2] Ecole Normale Super, CNRS, UMR 8537, Inst Alembert,Lab Photon Quant & Mol, Cachan, France

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 09期

关键词：

DEPENDENCE; EXCITONS; GELATIN; SHIFTS; STRAIN;

D O I：

10.1063/1.3116723

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on environmental effects on the optical properties of single-wall carbon nanotubes in a gelatin-based composite material designed to foster their photoluminescence. We show that the dielectric screening of excitons due to the surrounding medium is responsible for a sizeable shift of the luminescence lines, which hardly depends on the tube geometry. In contrast, the temperature dependence (from 4 to 300 K) of the luminescence is clearly chirality dependent; the first and second excitonic lines shift in opposite directions with a magnitude that can be related quantitatively to a strain-induced modification of the electronic structure due to an expansivity mismatch between the nanotube and the matrix. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3116723]

引用

页数：5

共 37 条

[1] Density, viscosity, and refractive index of the binary mixtures of cyclohexane with hexane, heptane, octane, nonane, and decane at (298.15, 303.15, and 308.15) K [J].