Field-induced unraveling of carbon nanotubes

被引:30
作者
Lee, YH
Kim, SG
Tomanek, D
机构
[1] JEONBUK NATL UNIV,DEPT PHYS,JEONJU 561756,SOUTH KOREA
[2] JEONBUK NATL UNIV,SEMICOND PHYS RES CTR,JEONJU 561756,SOUTH KOREA
基金
美国国家科学基金会;
关键词
D O I
10.1016/S0009-2614(96)01486-8
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 investigate the disintegration mechanism of carbon nanotubes in strong electric fields using the ab initio density functional formalism. We find that nanotubes withstand fields up to 2 V/Angstrom before they start unraveling carbon chains from the exposed edge, followed by field-induced fragmentation. We find this unraveling to be facilitated in negatively charged tubes, which have been shown to be efficient nano-scale electron emitters. We demonstrate that unraveling terminates at sites where adjacent walls are bridged by a covalent bond. (C) 1997 Published by Elsevier Science B.V.
引用
收藏
页码:667 / 672
页数:6
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