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dc.contributor.authorde Assumpcao, T. A. A.
dc.contributor.authorda Silva, D. M.
dc.contributor.authorKassab, L. R P [UNESP]
dc.contributor.authorMartinelli, J. R.
dc.contributor.authorde Araujo, C. B.
dc.date.accessioned2014-05-20T15:32:52Z
dc.date.available2014-05-20T15:32:52Z
dc.date.issued2010-10-01
dc.identifierhttp://dx.doi.org/10.1016/j.jnoncrysol.2010.02.016
dc.identifier.citationJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 356, n. 44-49, p. 2465-2467, 2010.
dc.identifier.issn0022-3093
dc.identifier.urihttp://hdl.handle.net/11449/41661
dc.description.abstractThe influence of the temperature on the nucleation of silver nanoparticles (NPs) in Tm3+/Yb3+ codoped PbO-GeO2 glasses was studied in this work. The infrared-to-visible frequency upconversion (UC) luminescence of Tm3+ ions was used to probe the NPs nucleation and the results were correlated with the increase of the heat-treatment temperature. Emission spectra in the blue-red region were measured by exciting the samples with a cw 980 nm diode laser in resonance with the Yb3+ transition (F-2(7/2) -> F-2(5/2)). The results were correlated with transmission electron microscopy measurements and revealed the different behavior of the nucleation process as a function of temperature.The enhanced UC emission in the visible region is attributed to the increased local field in the proximity of the silver NPs combined with the Yb3+ -> Tm3+ energy transfer. (C) 2010 Elsevier B.V. All rights reserved.en
dc.format.extent2465-2467
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Non-Crystalline Solids
dc.sourceWeb of Science
dc.subjectNanoparticlesen
dc.subjectUpconversionen
dc.subjectLead germanate glassen
dc.titleInfluence of the temperature on the nucleation of silver nanoparticles in Tm3+/Yb3+ codoped PbO-GeO2 glassesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de Pernambuco (UFPE)
dc.description.affiliationEPUSP, Dept Engn Sistemas Eletron, São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Lab Vidros & Datacao, FATEC SP, CEETEPS, São Paulo, Brazil
dc.description.affiliationUniversidade Federal de Pernambuco (UFPE), Dept Fis, BR-50670901 Recife, PE, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Lab Vidros & Datacao, FATEC SP, CEETEPS, São Paulo, Brazil
dc.identifier.doi10.1016/j.jnoncrysol.2010.02.016
dc.identifier.wosWOS:000285282100037
dc.rights.accessRightsAcesso restrito
dc.relation.ispartofjcr2.488
dc.relation.ispartofsjr0,722
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