Molecular dynamics simulations of stiffness-dependent friction of graphene

doi:10.3969/j.issn.1001-0505.2017.01.006

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	Molecular dynamics simulations of stiffness-dependent friction of graphene
	Dong, Yun 1,2,3; Liu, Chenhan 1,2; Duan, Zaoqi 1,2; Birahima, Gueye 1,2; Tao, Yi 1,2; Zhang, Yan 1,2; Chen, Yunfei 1,2
刊名	Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition)
	2017-01-20
卷号	47 期号:1 页码:28-32
关键词	Elasticity Energy barriers Graphene Molecular dynamics Multilayers Stiffness Van der Waals forces Difference values Different layers Friction coefficients Friction modeling Molecular dynamics simulations Multilayer graphene Normal deformations Normal stiffness
ISSN号	10010505
DOI	10.3969/j.issn.1001-0505.2017.01.006
英文摘要	Based on molecular dynamics simulations, a supported multilayer graphene friction model was constructed. First, the statistics on the friction coefficient of graphene with different layers under normal loads was carried out, and the relationship between the friction and layer numbers was obtained. Then the contributions of van der Waals force of the tip and the elastic deformation on the top layer of the multilayer graphene substrate on the friction force were analyzed. Finally, it was demonstrated that the effects on normal deformation energy and surface compliance were directly related to the observed friction force, and the contributions of surface energy barrier height and normal stiffness on the friction were quantitatively analyzed. The results indicate that under different loads the friction coefficient of 3 layers is 36% higher than that of 1 layer, and 40% higher than that of 2 layers; all friction forces are greater than van der Waals forces and the difference value between them becomes larger with the numbers of layers increasing; when the normal load is constant, the elastic energy of 3 layers is about 1.5 times as much as that of 2 layers and threefold of that of 1 layer, that is, the elastic energy of each layer has equal contribution to the friction due to the stiffness between layers is in series, the friction of graphene is caused by the competition between the stiffnesses of normal deformation energy and surface compliance. © 2017, Editorial Department of Journal of Southeast University. All right reserved.
语种	中文
出版者	Southeast University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114633]
专题	机电工程学院
作者单位	1.Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing; 211189, China 2.School of Mechanical Engineering, Southeast University, Nanjing; 211189, China; 3.School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Dong, Yun,Liu, Chenhan,Duan, Zaoqi,et al. Molecular dynamics simulations of stiffness-dependent friction of graphene[J]. Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition),2017,47(1):28-32.
APA	Dong, Yun.,Liu, Chenhan.,Duan, Zaoqi.,Birahima, Gueye.,Tao, Yi.,...&Chen, Yunfei.(2017).Molecular dynamics simulations of stiffness-dependent friction of graphene.Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition),47(1),28-32.
MLA	Dong, Yun,et al."Molecular dynamics simulations of stiffness-dependent friction of graphene".Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) 47.1(2017):28-32.