Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/109029 |
Resumo: | The pioneer work of Krim and Widom [Phys. Rev. B 38, 12184 (1988)] unveiled the origin of the viscous nature of friction at the atomic scale. This generated extensive experimental and theoretical activity. However, fundamental questions remain open like the relation between sliding friction and the topology of the substrate, as well as the dependence on the temperature of the contact surface. Here we present results, obtained using molecular dynamics, for the phononic friction coefficient (nph) for a one-dimensional model of an adsorbatesubstrate interface. Different commensuration relations between adsorbate and substrate are investigated as well as the temperature dependence of nph. In all the cases we studied nph depends quadratically on the substrate corrugation amplitude, but is a nontrivial function of the commensuration ratio between substrate and adsorbate. The most striking result is a deep and wide region of small values of nph for substrate-adsorbate commensuration ratios between ≈0.65 and 0.9. Our results shed some light on contradictory results for the relative size of phononic and electronic friction found in the literature. |
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Torres, Evy Augusto SalcedoGoncalves, SebastianScherer, ClaudioKiwi, Miguel2015-01-17T02:14:11Z20061098-0121http://hdl.handle.net/10183/109029000549725The pioneer work of Krim and Widom [Phys. Rev. B 38, 12184 (1988)] unveiled the origin of the viscous nature of friction at the atomic scale. This generated extensive experimental and theoretical activity. However, fundamental questions remain open like the relation between sliding friction and the topology of the substrate, as well as the dependence on the temperature of the contact surface. Here we present results, obtained using molecular dynamics, for the phononic friction coefficient (nph) for a one-dimensional model of an adsorbatesubstrate interface. Different commensuration relations between adsorbate and substrate are investigated as well as the temperature dependence of nph. In all the cases we studied nph depends quadratically on the substrate corrugation amplitude, but is a nontrivial function of the commensuration ratio between substrate and adsorbate. The most striking result is a deep and wide region of small values of nph for substrate-adsorbate commensuration ratios between ≈0.65 and 0.9. Our results shed some light on contradictory results for the relative size of phononic and electronic friction found in the literature.application/pdfengPhysical review. B, Condensed matter and materials physics. Vol. 73, no. 3 (Jan. 2006), 035434, 8 p.Atrito cinéticoNanoscale sliding friction versus commensuration ratio : molecular dynamics simulationsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000549725.pdf000549725.pdfTexto completo (inglês)application/pdf264482http://www.lume.ufrgs.br/bitstream/10183/109029/1/000549725.pdf70c4f6d516626f9410ee8efc7a3f0732MD51TEXT000549725.pdf.txt000549725.pdf.txtExtracted Texttext/plain35904http://www.lume.ufrgs.br/bitstream/10183/109029/2/000549725.pdf.txte81e700ef0b2f0f83edfe070d9b6b3c8MD52THUMBNAIL000549725.pdf.jpg000549725.pdf.jpgGenerated Thumbnailimage/jpeg2105http://www.lume.ufrgs.br/bitstream/10183/109029/3/000549725.pdf.jpg3071b68d037484903a29da48200db890MD5310183/1090292024-05-19 05:46:17.919707oai:www.lume.ufrgs.br:10183/109029Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-05-19T08:46:17Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
title |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
spellingShingle |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations Torres, Evy Augusto Salcedo Atrito cinético |
title_short |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
title_full |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
title_fullStr |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
title_full_unstemmed |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
title_sort |
Nanoscale sliding friction versus commensuration ratio : molecular dynamics simulations |
author |
Torres, Evy Augusto Salcedo |
author_facet |
Torres, Evy Augusto Salcedo Goncalves, Sebastian Scherer, Claudio Kiwi, Miguel |
author_role |
author |
author2 |
Goncalves, Sebastian Scherer, Claudio Kiwi, Miguel |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Torres, Evy Augusto Salcedo Goncalves, Sebastian Scherer, Claudio Kiwi, Miguel |
dc.subject.por.fl_str_mv |
Atrito cinético |
topic |
Atrito cinético |
description |
The pioneer work of Krim and Widom [Phys. Rev. B 38, 12184 (1988)] unveiled the origin of the viscous nature of friction at the atomic scale. This generated extensive experimental and theoretical activity. However, fundamental questions remain open like the relation between sliding friction and the topology of the substrate, as well as the dependence on the temperature of the contact surface. Here we present results, obtained using molecular dynamics, for the phononic friction coefficient (nph) for a one-dimensional model of an adsorbatesubstrate interface. Different commensuration relations between adsorbate and substrate are investigated as well as the temperature dependence of nph. In all the cases we studied nph depends quadratically on the substrate corrugation amplitude, but is a nontrivial function of the commensuration ratio between substrate and adsorbate. The most striking result is a deep and wide region of small values of nph for substrate-adsorbate commensuration ratios between ≈0.65 and 0.9. Our results shed some light on contradictory results for the relative size of phononic and electronic friction found in the literature. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006 |
dc.date.accessioned.fl_str_mv |
2015-01-17T02:14:11Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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publishedVersion |
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http://hdl.handle.net/10183/109029 |
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1098-0121 |
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000549725 |
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1098-0121 000549725 |
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http://hdl.handle.net/10183/109029 |
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eng |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter and materials physics. Vol. 73, no. 3 (Jan. 2006), 035434, 8 p. |
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openAccess |
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