Graphene thickness dependent adhesion force and its correlation to surface roughness

Journal Article · Mon Apr 28 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4871315· OSTI ID:22267741

Pourzand, Hoorad ^[1]; Tabib-Azar, Massood ^[1]

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1. Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)

In this paper, adhesion force of graphene layers on 300 nm silicon oxide is studied. A simple model for measuring adhesion force for a flat surface with sub-nanometer roughness was developed and is shown that small surface roughness decreases adhesion force while large roughness results in an effectively larger adhesion forces. We also show that surface roughness over scales comparable to the tip radius increase by nearly a factor of two, the effective adhesion force measured by the atomic force microscopy. Thus, we demonstrate that surface roughness is an important parameter that should be taken into account in analyzing the adhesion force measurement results.

• OSTI ID: 22267741
• Journal Information: Applied Physics Letters, Vol. 104, Issue 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESION
GRAPHENE
LAYERS
ROUGHNESS
SILICON OXIDES
SURFACES
THICKNESS