Volume 156, 2012
From the journal:

Faraday Discussions

Mechanism of ultra low friction of multilayer graphene studied by coarse-grained molecular simulation

Hitoshi Washizu,*a   Seiji Kajita,a   Mamoru Tohyama,a   Toshihide Ohmori,a   Noriaki Nishino,b   Hiroshi Teranishib  and  Atsushi Suzukib  

* Corresponding authors

a Toyota Central R&D Labs., Inc., Nagakute, Japan
E-mail: h@washizu.org
Fax: +81 561 63 6920
Tel: +81 561 71 7531

b Toyota Motor Corporation, 1 Toyota-cho, Toyota, Japan

Abstract

Coarse-grained Metropolis Monte Carlo Brownian Dynamics simulations are used to clarify the ultralow friction mechanism of a transfer film of multilayered graphene sheets. Each circular graphene sheet consists of 400 to 1,000,000 atoms confined between the upper and lower sliders and are allowed to move in 3 translational and 1 rotational directions due to thermal motion at 300 K. The sheet–sheet interaction energy is calculated by the sum of the pair potential of the sp2 carbons. The sliding simulations are done by moving the upper slider at a constant velocity. In the monolayer case, the friction force shows a stick-slip like curve and the average of the force is high. In the multilayer case, the friction force does not show any oscillation and the average of the force is very low. This is because the entire transfer film has an internal degree of freedom in the multilayer case and the lowest sheet of the layer is able to follow the equipotential surface of the lower slider.

  • This article is part of the themed collection: Tribology
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Article information

DOI
https://doi.org/10.1039/C2FD00119E
Article type
Paper
Submitted
25 Nov 2011
Accepted
09 Dec 2011
First published
30 Jan 2012

Faraday Discuss., 2012,156, 279-291

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Mechanism of ultra low friction of multilayer graphene studied by coarse-grained molecular simulation

H. Washizu, S. Kajita, M. Tohyama, T. Ohmori, N. Nishino, H. Teranishi and A. Suzuki, Faraday Discuss., 2012, 156, 279 DOI: 10.1039/C2FD00119E

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