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나노 구조 물리 연구단
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Hyperdislocations in van der Waals Layered Materials

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Title
Hyperdislocations in van der Waals Layered Materials
Author(s)
Thuc Hue Ly; Jiong Zhao; Dong Hoon Keum; Qingming Deng; Zhiyang Yu; Young Hee Lee
Publication Date
2016-12
Journal
NANO LETTERS, v.16, no.12, pp.7807 - 7813
Publisher
AMER CHEMICAL SOC
Abstract
Dislocations are one-dimensional line defects in three-dimensional crystals or periodic structures. It is common that the dislocation networks made of interactive dislocations be generated during plastic deformation. In van der Waals layered materials, the highly anisotropic nature facilitates the formation of such dislocation networks, which is critical for the friction or exfoliation behavior for these materials. By transmission electron microscopy analysis, we found the topological defects in such dislocation networks can be perfectly rationalized in the framework of traditional dislocation theory, which we applied the name "hyper dislocations". Due to the strong pinning effect of hyper dislocations, the state of exfoliation can be easily triggered by 1 twisting between two layers, which also explains the origin of disregistry and frictionlessness for all of the superlubricants that are widely used for friction reduction and wear protection. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/3208
ISSN
1530-6984
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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