Sensitivity of single-wall carbon nanotubes to chemical processing: an electron microscopy investigation

被引：356

作者：

Monthioux, M

Smith, BW

Burteaux, B

Claye, A

Fischer, JE

Luzzi, DE

机构：

[1] Ctr Elaborat Mat & Etud Struct, UPR A 8011 CNRS, F-31055 Toulouse 4, France

[2] Univ Penn, Dept Mat Sci, Philadelphia, PA 19104 USA

来源：

CARBON | 2001年 / 39卷 / 08期

基金：

美国国家科学基金会;

关键词：

carbon nanotubes; chemical treatment; transmission electron microscopy; defects; microstructure;

D O I：

10.1016/S0008-6223(00)00249-9

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 nanotube (SWNT) materials subjected to Various chemical treatments including regular, published, acidic purification treatments, were investigated by high resolution transmission electron microscopy and X-ray diffraction. Results show that acid purification cannot avoid SWNT structure alteration. The liquid, acidic medium provokes the gathering of pre-existing fullerenes into crystallised fullerite. A slight temperature increase has a dramatic effect on SWNT degradation which can result in complete amorphisation. Immersion of some of the SWNT materials in dimethylformamide (DMF) was also found to be harmful to the SWNT structure. Several observations suggest that as-prepared (not treated) SWNTs contain structural defects along the tube walls which act as preferred sites for the acid (or DMF) attack, inducing side wall openings. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1251 / 1272

页数：22

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