Journal
PHYSICAL REVIEW B
Volume 87, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.035417
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Funding
- National Science Foundation (NSF) [DMR-0805136]
- Kentucky NSF EPSCoR program [EPS-0814194]
- University of Kentucky (UK) Center for Advanced Materials (CAM)
- University of Kentucky Office of the Vice President for Research
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0805136] Funding Source: National Science Foundation
- Office Of The Director
- EPSCoR [814194] Funding Source: National Science Foundation
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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. DOI: 10.1103/PhysRevB.87.035417
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