Size-dependent commensurability and its possible role in determining the frictional behavior of adsorbed systems
| Autor: | Maria Clelia Righi, Mauro Ferrario, Giampaolo Mistura, Paolo Restuccia, Pier Luigi Sivestrelli |
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| Přispěvatelé: | Restuccia, Paolo, Ferrario, Mauro, Sivestrelli, Pier Luigi, Mistura, Giampaolo, Righi, Maria Clelia |
| Rok vydání: | 2016 |
| Předmět: |
ADSORPTION
Ab initio FOS: Physical sciences General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Slip (materials science) MONOLAYER 01 natural sciences law.invention XENON Molecular dynamics Xenon law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Physics::Atomic and Molecular Clusters Nanoattrito Grafene Dinamica Molecolare Calcoli ab initio Physical and Theoretical Chemistry 010306 general physics ISLANDS Nanoattrito Physics STATIC FRICTION Condensed Matter - Mesoscale and Nanoscale Physics Graphene 021001 nanoscience & nanotechnology Critical value Dinamica Molecolare Calcoli ab initio chemistry MOLECULAR-DYNAMICS Chemical physics Grafene Slippage 0210 nano-technology Structure factor |
| Zdroj: | PCCP. Physical chemistry chemical physics 18 (2016): 28997–29004. doi:10.1039/c6cp05386f info:cnr-pdr/source/autori:Restuccia P.; Ferrario M.; Silvestrelli P.L.; Mistura G.; Righi M.C./titolo:Size-dependent commensurability and its possible role in determining the frictional behavior of adsorbed systems/doi:10.1039%2Fc6cp05386f/rivista:PCCP. Physical chemistry chemical physics (Print)/anno:2016/pagina_da:28997/pagina_a:29004/intervallo_pagine:28997–29004/volume:18 |
| ISSN: | 1463-9084 1463-9076 |
| Popis: | Recent nanofriction experiments of xenon on graphene revealed that the slip onset can be induced by increasing the adsorbate coverage above a critical value, which depends on temperature. Moreover, the xenon slippage on gold is much higher than on graphene in spite of the same physical nature of the interactions. To shed light on these intriguing results we have performed molecular dynamics simulations relying on ab initio derived potentials. By monitoring the interfacial structure factor as a function of coverage and temperature, we show that the key mechanism to interpret the observed frictional phenomena is the size-dependence of the island commensurability. The latter quantity is deeply affected also by the lattice misfit, which explains the different frictional behavior of Xe on graphene and gold. Comment: 9 pages, 4 figures, 2 tables |
| Databáze: | OpenAIRE |
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