Many-particle diffusion in continuum: Influence of a periodic surface potential

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Lahtinen, J. M.
dc.contributor.author Masin, M.
dc.contributor.author Laurila, T.
dc.contributor.author Ala-Nissilä, Tapio
dc.contributor.author Chvoj, Z.
dc.date.accessioned 2015-04-22T09:00:31Z
dc.date.available 2015-04-22T09:00:31Z
dc.date.issued 2002
dc.identifier.citation Lahtinen, J. M. & Masin, M. & Laurila, T. & Ala-Nissilä, Tapio & Chvoj, Z. 2002. Many-particle diffusion in continuum: Influence of a periodic surface potential. The Journal of Chemical Physics. Volume 116, Issue 17. P. 7666-7672. ISSN 1089-7690 (electronic). ISSN 0021-9606 (printed). DOI: 10.1063/1.1467908. en
dc.identifier.issn 1089-7690 (electronic)
dc.identifier.issn 0021-9606 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/15743
dc.description.abstract We study the diffusion of Brownian particles with a short-range repulsion on a surface with a periodic potential through molecular dynamics simulations and theoretical arguments. We concentrate on the behavior of the tracer and collective diffusion coefficients DT(θ) and DC(θ), respectively, as a function of the surface coverage θ. In the high friction regime we find that both coefficients are well approximated by the Langmuir lattice-gas results for up to θ≈0.7 in the limit of a strongly binding surface potential. In particular, the static compressibility factor within DC(θ) is very accurately given by the Langmuir formula for 0⩽θ⩽1. For higher densities, both DT(θ) and DC(θ)show an intermediate maximum which increases with the strength of the potential amplitude. In the low friction regime we find that long jumps enhance blocking and DT(θ) decreases more rapidly for submonolayer coverages. However, for higher densities DT(θ)/DT(0) is almost independent of friction as long jumps are effectively suppressed by frequent interparticle collisions. We also study the role of memory effects for many-particle diffusion. en
dc.format.extent 7666-7672
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.ispartofseries The Journal of Chemical Physics en
dc.relation.ispartofseries Volume 116, Issue 17
dc.rights © 2002 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. http://scitation.aip.org/content/aip/journal/jcp en
dc.subject.other Physics en
dc.title Many-particle diffusion in continuum: Influence of a periodic surface potential en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Institute of Physics
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.contributor.department Department of Applied Physics en
dc.subject.keyword diffusion en
dc.subject.keyword friction en
dc.subject.keyword surface charge en
dc.subject.keyword surface dynamics en
dc.subject.keyword lattice theory en
dc.identifier.urn URN:NBN:fi:aalto-201504212376
dc.type.dcmitype text en
dc.identifier.doi 10.1063/1.1467908
dc.type.version Final published version en


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