Journal
JOURNAL OF APPLIED PHYSICS
Volume 112, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4768909
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Funding
- Directorate For Engineering [1216441] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1068741] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [1216441] Funding Source: National Science Foundation
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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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4768909]
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