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dc.contributor.authorPapaleo, Ricardo Meurerpt_BR
dc.contributor.authorLeal, Rafael Gustavo Torrespt_BR
dc.contributor.authorCarreira, Willian Hasenkamppt_BR
dc.contributor.authorBarbosa, Luiz Gustavo de Moura da Silvapt_BR
dc.contributor.authorBello, Ivopt_BR
dc.contributor.authorBulla, Agostinho Antôniopt_BR
dc.date.accessioned2015-01-21T02:17:18Zpt_BR
dc.date.issued2006pt_BR
dc.identifier.issn1098-0121pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/109082pt_BR
dc.description.abstractWe report on measurements of relaxation times of nanometer-sized deformations resulting from the impact of individual energetic ions on poly methyl methacrylate surfaces at temperatures close to and below the glass transition Tg. The temporal evolution of the dimensions of the deformations is well described by a stretched exponential function, but with relaxation times T many orders of magnitude smaller than bulk values at the same T. The local Tg was around 86 °C, roughly 30 °C below the conventional bulk Tg. At the vicinity of the local Tg, T follows the Vogel-Fulcher type of T dependence, but at lower T a transition towards a less steep behavior is seen.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 74, no. 9 (Sept. 2006), 094203, 5 p.pt_BR
dc.rightsOpen Accessen
dc.subjectDeformaçãopt_BR
dc.subjectTransicao vitreapt_BR
dc.subjectEfeitos de feixe iônicopt_BR
dc.subjectFilmes poliméricospt_BR
dc.subjectEstrutura de superfíciept_BR
dc.titleRalaxation times of nanoscale deformations on the surface of a polymer thin film near and below the glass transitionpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000561756pt_BR
dc.type.originEstrangeiropt_BR


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