单根碳纳米管拉曼光谱的温度依赖性

Temperature dependence of the Raman spectra of individual carbon nanotubes.

作者信息

Zhou Zhenping, Dou Xinyuan, Ci Lijie, Song Li, Liu Dongfang, Gao Yan, Wang Jianxiong, Liu Lifeng, Zhou Weiya, Xie Sishen, Wan Dongyun

机构信息

Institute of Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China.

出版信息

J Phys Chem B. 2006 Jan 26;110(3):1206-9. doi: 10.1021/jp053268r.

DOI:10.1021/jp053268r

PMID:16471665

Abstract

Resonant Raman scattering (RRS) spectra of individual carbon nanotubes on a SiO2 substrate have been investigated first in the temperature range of 100-600 K (Phys. Rev. B 2002, 66, 115411). It was revealed by the intensity abnormality of the radial breathing mode (RBM) that the carbon nanotubes have a temperature-dependent density of electronic states. This means that the previously reported temperature coefficients of RBM of carbon nanotubes are smaller than their "real" ones for the bulk samples of single- or double-walled carbon nanotubes. Comparatively, the G line of individual nanotubes shows no observable difference relative to the bulk samples.

摘要

首先在100 - 600 K的温度范围内研究了SiO₂衬底上单个碳纳米管的共振拉曼散射（RRS）光谱（《物理评论B》2002年，66卷，115411页）。通过径向呼吸模式（RBM）的强度异常发现，碳纳米管具有与温度相关的电子态密度。这意味着，对于单壁或双壁碳纳米管的块状样品，先前报道的碳纳米管RBM的温度系数小于其“真实”值。相比之下，单个纳米管的G线与块状样品相比没有观察到明显差异。