Friction, adhesion, and elasticity of graphene edges

D. Patrick Hunley, Tyler J. Flynn, Tom Dodson, Abhishek Sundararajan, Mathias J. Boland, and Douglas R. Strachan
Phys. Rev. B 87, 035417 – Published 22 January 2013

Abstract

Frictional, adhesive, and elastic characteristics of graphene edges are determined through lateral force microscopy. Measurements reveal a significant local frictional increase at exposed graphene edges, whereas a single overlapping layer of graphene removes this local frictional increase. Comparison of lateral force and atomic force microscopy measurements shows that local forces on the probe are successfully modeled with a vertical adhesion in the vicinity of the atomic-scale graphene steps which also provides a new low-load calibration method. Lateral force microscopy performed with carefully maintained low-adhesion probes shows evidence of elastic straining of graphene edges. Estimates of the energy stored of this observed elastic response is consistent with out-of-plane bending of the graphene edge.

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  • Received 27 August 2012

DOI:https://doi.org/10.1103/PhysRevB.87.035417

©2013 American Physical Society

Authors & Affiliations

D. Patrick Hunley, Tyler J. Flynn, Tom Dodson, Abhishek Sundararajan, Mathias J. Boland, and Douglas R. Strachan*

  • University of Kentucky, Department of Physics and Astronomy, Lexington, Kentucky 40506, USA

  • *Corresponding author: doug.strachan@uky.edu

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Issue

Vol. 87, Iss. 3 — 15 January 2013

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