Vacancy migrations in carbon nanotubes

被引：78

作者：

Jin, Chuanhong ^{[1
]}

Suenaga, Kazu ^{[1
]}

Iijima, Sumio ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Ctr Adv Carbon Mat, Tsukuba, Ibaraki 3058565, Japan

来源：

NANO LETTERS | 2008年 / 8卷 / 04期

关键词：

D O I：

10.1021/nl0732676

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Activities of vacancy defects in carbon nanotubes have been directly monitored by in situ high-resolution transmission electron microscopy at elevated temperatures. Adatom-vacancy pair defects are first prolific due to the knock-on damage, and then the induced vacancies indeed grow up to 1-2 nm in the size by the following Joule heating. Surprisingly, these large vacancies, or "holes", tend to migrate and coalesce with each other to form even larger ones. It suggests that the activation barrier has been substantially lowered due to the contributions of an electromigration and/or irradiation effect.

引用

页码：1127 / 1130

页数：4

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