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Atomic-Scale Sliding Friction on Graphene in Water

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Vilhena, J.G. and Pimentel, Carlos and Pedraz, Patricia and Luo, Feng and Serena, Pedro A. and Pina Martínez, Carlos Manuel and Gnecco, Enrico and Pérez, Rubén (2016) Atomic-Scale Sliding Friction on Graphene in Water. ACS Nano, 10 . pp. 4288-4293. ISSN 1936-0851, ESSN: 1936-086X

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Official URL: https://pubs.acs.org/



Abstract

The sliding of a sharp nanotip on graphene completely immersed in water is investigated by molecular dynamics (MD) and atomic force microscopy. MD simulations predict that the atomicscale stick−slip is almost identical to that found in ultrahigh vacuum. Furthermore, they show that water plays a purely stochastic role in sliding (solid-to-solid) friction. These observations are substantiated by friction measurements on graphene grown on Cu and Ni, where, oppositely of the operation in air, lattice resolution is readily achieved. Our results promote friction force microscopy in water as a robust alternative to ultra-high-vacuum measurements.


Item Type:Article
Uncontrolled Keywords:Friction, Nanoscale, Friction in water, Friction force microscopy, Nanoasperity, Lattice resolution, Graphene, Molecular dynamics, Steered molecular dynamics, Vacuum, Water, Hydration layers
Subjects:Sciences > Geology > Crystallography
ID Code:50753
Deposited On:16 Jan 2019 12:45
Last Modified:16 Jan 2019 12:54

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