Mechanical Engineering Faculty Research

Title

Role of Wrinkle Height in Friction Variation with Number of Graphene Layers

Document Type

Article

Publication Date

Winter 12-1-2012

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.

Publication Title

Journal of Applied Physics

Volume

112

Issue

11

First Page

116102

Last Page

116102