Imaging active topological defects in carbon nanotubes

被引:279
作者
Suenaga, Kazu [1 ]
Wakabayashi, Hideaki [1 ]
Koshino, Masanori [1 ]
Sato, Yuta [1 ]
Urita, Koki [1 ]
Iijima, Sumio [1 ]
机构
[1] Natl Inst Adv Ind Sci & Technol, JST, ERATO, Tsukuba, Ibaraki 3058565, Japan
关键词
D O I
10.1038/nnano.2007.141
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A single-walled carbon nanotube (SWNT) is a wrapped single graphene layer, and its plastic deformation should require active topological defects-non-hexagonal carbon rings that can migrate along the nanotube wall. Although in situ transmission electron microscopy (TEM) has been used to examine the deformation of SWNTs1-3, these studies deal only with diameter changes and no atomistic mechanism has been elucidated experimentally. Theory predicts that some topological defects can form through the Stone-Wales transformation in SWNTs under tension at 2,000 K, and could act as a dislocation core(4,5). We demonstrate here, by means of high-resolution (HR)-TEM with atomic sensitivity, the first direct imaging of pentagon-heptagon pair defects found in an SWNT that was heated at 2,273 K. Moreover, our in situ HR-TEM observation reveals an accumulation of topological defects near the kink of a deformed nanotube. This result suggests that dislocation motions or active topological defects are indeed responsible for the plastic deformation of SWNTs.
引用
收藏
页码:358 / 360
页数:3
相关论文
共 15 条
[1]   Surface reconstructions and dimensional changes in single-walled carbon nanotubes [J].
Ajayan, PM ;
Ravikumar, V ;
Charlier, JC .
PHYSICAL REVIEW LETTERS, 1998, 81 (07) :1437-1440
[2]   Irradiation effects in carbon nanostructures [J].
Banhart, F .
REPORTS ON PROGRESS IN PHYSICS, 1999, 62 (08) :1181-1221
[3]   How evaporating carbon nanotubes retain their perfection? [J].
Ding, Feng ;
Jiao, Kun ;
Lin, Yu ;
Yakobson, Boris I. .
NANO LETTERS, 2007, 7 (03) :681-684
[4]   Symmetry-, time-, and temperature-dependent strength of carbon nanotubes [J].
Dumitrica, T ;
Hua, M ;
Yakobson, BI .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2006, 103 (16) :6105-6109
[5]   Adatoms and nanoengineering of carbon [J].
Ewels, CP ;
Heggie, MI ;
Briddon, PR .
CHEMICAL PHYSICS LETTERS, 2002, 351 (3-4) :178-182
[6]   Direct evidence for atomic defects in graphene layers [J].
Hashimoto, A ;
Suenaga, K ;
Gloter, A ;
Urita, K ;
Iijima, S .
NATURE, 2004, 430 (7002) :870-873
[7]   Superplastic carbon nanotubes - Conditions have been discovered that allow extensive deformation of rigid single-walled nanotubes. [J].
Huang, JY ;
Chen, S ;
Wang, ZQ ;
Kempa, K ;
Wang, YM ;
Jo, SH ;
Chen, G ;
Dresselhaus, MS ;
Ren, ZF .
NATURE, 2006, 439 (7074) :281-281
[8]   Mechanism of strain release in carbon nanotubes [J].
Nardelli, MB ;
Yakobson, BI ;
Bernholc, J .
PHYSICAL REVIEW B, 1998, 57 (08) :R4277-R4280
[9]   ACCURATE AND SIMPLE ANALYTIC REPRESENTATION OF THE ELECTRON-GAS CORRELATION-ENERGY [J].
PERDEW, JP ;
WANG, Y .
PHYSICAL REVIEW B, 1992, 45 (23) :13244-13249
[10]   THEORETICAL-STUDIES OF ICOSAHEDRAL C60 AND SOME RELATED SPECIES [J].
STONE, AJ ;
WALES, DJ .
CHEMICAL PHYSICS LETTERS, 1986, 128 (5-6) :501-503