1. Role of wrinkle height in friction variation with number of graphene layers.
- Author
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Ye, Zhijiang, Tang, Chun, Dong, Yalin, and Martini, Ashlie
- Subjects
MOLECULAR dynamics ,GRAPHENE ,FRICTION ,MECHANICS (Physics) ,DYNAMICS - Abstract
Molecular dynamics simulations are performed to study the frictional behavior of graphene. It is found that the friction between a diamond tip and graphene decreases with increasing number of graphene layers. This behavior is also affected by the graphene sheet size; specifically, the effect of the number of layers on friction becomes significant only when the modeled graphene sheets exceed a critical length. We further show that the frictional behavior can be directly correlated to the height of near-contact wrinkles that resist sliding. These observations are rationalized in terms of the ability of multiple sheets to act as a single material as they resist wrinkle formation. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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