Model calculations of superlubricity of graphite
Model calculations of superlubricity of graphite
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DOI：
10.1103/physrevb.70.165418
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发表时间：
2004-10-01
影响因子：
3.7
通讯作者：
Frenken, JWM
中科院分区：
文献类型：
--
作者：
Verhoeven, GS;Dienwiebel, M;Frenken, JWM
本文在修正的汤姆林森模型的框架内对有限的、纳米级的刚性石墨片和刚性石墨表面之间的摩擦进行了理论分析。研究横向力作为薄片和表面晶格之间的取向失配、薄片的拉伸方向、薄片尺寸和薄片形状的函数。计算表明，摩擦力的方向依赖性提供了有关接触尺寸和形状的信息。我们发现计算结果和实验结果之间非常吻合，Dienwiebel 最近发表的出版物中对此进行了讨论 [M. Dienwiebel、G. S. Verhoeven、N. Pradeep、J. W. M. Frenken、J. A. Heimberg 和 H. W. Zandbergen，物理学家。莱特牧师。 92, 126101 (2004)]。
In this paper, friction between a finite, nanometer-sized, rigid graphite flake and a rigid graphite surface is analyzed theoretically in the framework of a modified Tomlinson model. Lateral forces are studied as a function of orientational misfit between flake and surface lattices, pulling direction of the flake, flake size and flake shape. The calculations show that the orientation dependence of the friction provides information on the contact size and shape. We find good agreement between the calculations and the experimental results, discussed in a recent publication by Dienwiebel [M. Dienwiebel, G. S. Verhoeven, N. Pradeep, J. W. M. Frenken, J. A. Heimberg, and H. W. Zandbergen, Phys. Rev. Lett. 92, 126101 (2004)].