Graphene helicoid as novel nanospring

被引:46
作者
Zhan, Haifei [1 ,2 ]
Zhang, Yingyan [1 ]
Yang, Chunhui [1 ]
Zhang, Gang [3 ]
Gu, Yuantong [2 ]
机构
[1] Western Sydney Univ, Sch Comp Engn & Math, Locked Bag 1797, Penrith, NSW 2751, Australia
[2] Queensland Univ Technol, Sch Chem Phys & Mech Engn, Brisbane, Qld 4001, Australia
[3] Agcy Sci Technol & Res, Inst High Performance Comp, 1 Fusionopolis Way, Singapore 138632, Singapore
关键词
Graphene nanoribbon; Helicoid; Spring; Tensile deformation; Molecular dynamics simulation; ELASTIC PROPERTIES; CARBON NANOCOILS; DISLOCATIONS; MECHANISM; FRACTURE; DEVICES; GROWTH; NEMS;
D O I
10.1016/j.carbon.2017.05.044
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Advancement of nanotechnology has greatly accelerated the miniaturization of mechanical or electronic devices/components. This work proposes a new nanoscale spring - a graphene nanoribbon-based helicoid (GH) structure by using large-scale molecular dynamics simulation. It is found that the GH structure not only possesses an extraordinary high tensile deformation capability, but also exhibits unique features not accessible from traditional springs. Specifically, its yield strain increases when its inner radius is enlarged, which can exceed 1000%, and it has three elastic deformation stages including the initial delamination, stable delamination and elastic deformation. Moreover, the failure of the GH is found to be governed by the failure of graphene nanoribbon and the inner edge atoms absorb most of the tensile strain energy. Such fact leads to a constant elastic limit force (corresponding to the yield point) for all GHs. This study has provided a comprehensive understanding of the tensile behaviors of GH, which opens the avenue to design novel nanoscale springs based on 2D nanomaterials. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:258 / 264
页数:7
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