期刊
SURFACE & COATINGS TECHNOLOGY
卷 237, 期 -, 页码 230-233出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2013.06.039
关键词
Dangling bonds; Cross-linking; Graphene layers; Scratch hardness
Dangling bond induced cross-linking in an interlayer graphene during nanoscratch is simulated by molecular dynamics method. The normal stress over 74 GPa leads to a broken hexagonal ring of the intralayer graphene, producing unstable dangling bonds which easily make up sp(2) or sp(3) between neighbor layers. The cross-linking density increases with increasing scratching depth, causing higher scratch hardness. The maximum scratch hardness is 90 GPa. The cross-linking is reversible after scratch when the normal stress is less than 90 GPa, beyond which the atoms from different graphene layers will be mixed together forming amorphous structure, making the scratch hardness decrease sharply. These results provide insights into the structural and mechanical properties of graphene based materials. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据