Microcrystalline SWNT material

被引：12

作者：

Umek, P

Hassanien, A

Tokumoto, M

Mihailovic, D

机构：

[1] Jozef Stefan Inst, Ljubljana 1000, Slovenia

[2] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

来源：

CARBON | 2000年 / 38卷 / 11-12期

关键词：

nanotubes; scanning tunneling microscopy (STM);

D O I：

10.1016/S0008-6223(99)00294-8

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：

We report here on an optimised purification method for carbon nanotubes which yields microcrystalline single wall nanorube (SWNT) material. For this work the material is characterised using a scanning tunneling microscope (STM) with atomic resolution at room temperature. Tn the purified material, tubes with armchair structure prevail (diameter 1.7-2.5 nm), although tubes with other chiralities are also present. Based on STM topographic images the purity of SWNT material in the final step was estimated to be between 70 and 80%. In contrast to well-known ropes of SWNTs, the microcrystalline material is composed of parallel SWNTs which are not twisted, forming a crystalline structure in two dimensions. An interesting point is that tubes from one microcrystal appear from the STM images all to have the same chirality. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1723 / 1727

页数：5

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