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Dislocation-Driven Deformations in Graphene
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DOI：10.1126/science.1217529.png)
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Abstract
En 中文
Moving Dislocations
The mechanical properties of crystalline materials are limited by the presence and motion of defects caused by extra or missing atoms in the crystal lattice. Plastic deformation of a material causes these defects, known as dislocations, to move and multiply. Much is known about the motion of dislocations in three dimensions but less so in two.
Warner
et al.
(p.
209
; see the Perspective by
Bonilla and Carpio
) used graphene as a model material to track dislocation dynamics in real time. The strain fields in the graphene sheet were mapped, which suggests that the dislocation motion is connected to the stretching, rotating, and breaking of individual carbon bonds.
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