Structural characterization and diameter-dependent oxidative stability of single wall carbon nanotubes synthesized by the catalytic decomposition of CO

被引：237
作者：
Zhou, W
Ooi, YH
Russo, R
Papanek, P
Luzzi, DE
Fischer, JE
Bronikowski, MJ
Willis, PA
Smalley, RE
机构：
[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
[2] Rice Univ, Ctr Nanoscale & Technol, Houston, TX 77259 USA
来源：
CHEMICAL PHYSICS LETTERS | 2001年 / 350卷 / 1-2期
基金：
美国国家科学基金会; 美国国家航空航天局;
关键词：
D O I：
10.1016/S0009-2614(01)01237-4
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：
Low T oxidation followed by brief sonication in hot HCl has been optimized to remove Fe catalyst residues from HiPco material with minimal loss of tubes. One pass reduces Fe from 6-10 to 0.6-1.6 at.% with 60% yield, most of the loss being Fe. Raman scattering reveals a broad diameter distribution with a mean of 1.0-1.1 tun. After purification we find excellent correlation between oxidation temperature and Raman spectra whereby the oxidation rate varies inversely with tube diameter. This can be explained by the larger strain associated with greater curvature of small tubes. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：6 / 14
页数：9
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