UV-vis absorption spectroscopy of carbon nanotubes: Relationship between the π-electron plasmon and nanotube diameter

被引：157

作者：

Rance, Graham A. ^{[1
]}

Marsh, Dan H. ^{[1
]}

Nicholas, Robin J. ^{[2
]}

Khlobystov, Andrei N. ^{[1
]}

机构：

[1] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England

[2] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

CHEMICAL PHYSICS LETTERS | 2010年 / 493卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

OPTICAL-PROPERTIES; BAND-STRUCTURE; GRAPHITE; SPECTRA;

D O I：

10.1016/j.cplett.2010.05.012

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：

The position and intensity of the pi plasmon absorbance of a series of single-walled and multi-walled carbon nanotubes has been systematically investigated for the first time using ultraviolet-visible (UV-vis) absorption spectroscopy. All nanotube samples obey the Lambert-Beer law and exhibit similar extinction coefficients (similar to 50 mL/mg cm) regardless of their structure or method of preparation. The absolute wave-length (energy) of the pi plasmon absorbance has been shown to vary with nanotube diameter as E-pi = 4.80 + 0.70/(d(NT))(2). This empirical relationship when correlated with nanotube pyramidalisation angle can be used to estimate the energy range for the pi plasmon in a single sheet of graphene to be 4.8-4.9 eV. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：19 / 23

页数：5

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