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Title

Atomic-Scale Sliding Friction on Graphene in Water

AuthorsVilhena, J. G. ; Pimentel, Carlos ; Pedraz, Patricia; Luo, Feng; Serena, Pedro A. ; Pina, Carlos M. ; Gnecco, Enrico; Pérez, Rubén
KeywordsFriction
Nanoscale
Friction in water
Friction force microscopy
Nanoasperity
Lattice resolution
Graphene
Molecular dynamics
Steered molecular dynamics
Vacuum
Water
Hydration layers
Issue Date16-Mar-2016
PublisherAmerican Chemical Society
CitationACS Nano, 10 (4): 4288–4293 (2016)
AbstractThe 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 atomic-scale 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.
Publisher version (URL)http://dx.doi.org/10.1021/acsnano.5b07825
URIhttp://hdl.handle.net/10261/133070
DOI10.1021/acsnano.5b07825
ISSN1936-0851
E-ISSN1936-086X
Appears in Collections:(ICMM) Artículos
(IGEO) Artículos
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