Dislocation-Driven Deformations in Graphene

被引：341

作者：

Warner, Jamie H. ^{[1
]}

Margine, Elena Roxana ^{[1
]}

Mukai, Masaki ^{[2
]}

Robertson, Alexander W. ^{[1
]}

Giustino, Feliciano ^{[1
]}

Kirkland, Angus I. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] JEOL, Akishima, Tokyo 1968558, Japan

来源：

SCIENCE | 2012年 / 337卷 / 6091期

基金：

欧洲研究理事会; 英国工程与自然科学研究理事会;

关键词：

ELECTRON-MICROSCOPY; CARBON NANOTUBES; ATOMIC-STRUCTURE; HIGH-RESOLUTION; DEFECTS; STRAIN; STRENGTH; FIELDS; FILMS; TEM;

D O I：

10.1126/science.1217529

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The movement of dislocations in a crystal is the key mechanism for plastic deformation in all materials. Studies of dislocations have focused on three-dimensional materials, and there is little experimental evidence regarding the dynamics of dislocations and their impact at the atomic level on the lattice structure of graphene. We studied the dynamics of dislocation pairs in graphene, recorded with single-atom sensitivity. We examined stepwise dislocation movement along the zig-zag lattice direction mediated either by a single bond rotation or through the loss of two carbon atoms. The strain fields were determined, showing how dislocations deform graphene by elongation and compression of C-C bonds, shear, and lattice rotations.

引用

页码：209 / 212

页数：5

共 33 条

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