Universidad Complutense de Madrid
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Atomic-Scale Sliding Friction on Graphene in Water



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Vilhena, J.G. y Pimentel, Carlos y Pedraz, Patricia y Luo, Feng y Serena, Pedro A. y Pina Martínez, Carlos Manuel y Gnecco, Enrico y 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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URL Oficial: https://pubs.acs.org/


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.

Tipo de documento:Artículo
Palabras clave:Friction, Nanoscale, Friction in water, Friction force microscopy, Nanoasperity, Lattice resolution, Graphene, Molecular dynamics, Steered molecular dynamics, Vacuum, Water, Hydration layers
Materias:Ciencias > Geología > Cristalografía
Código ID:50753
Depositado:16 Ene 2019 12:45
Última Modificación:16 Ene 2019 12:54

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