Atomic-Scale Sliding Friction on Graphene in Water
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 atomic-scale stick–slip is almost identical to that found in ultrahigh vacuum. Furthermore, they show that water plays a pur...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/133070 |
| Acceso en línea: | http://hdl.handle.net/10261/133070 |
| Access Level: | acceso abierto |
| Palabra clave: | Friction Nanoscale Friction in water Friction force microscopy Nanoasperity Lattice resolution Graphene Molecular dynamics Steered molecular dynamics Vacuum Water Hydration layers http://metadata.un.org/sdg/6 Ensure availability and sustainable management of water and sanitation for all |
| Sumario: | 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 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. |
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