SiO2-GeO2 soot preform as a core for Eu2O3 nanocoating: Synthesis and photophysical study

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dc.contributor.authorRosa, Ieda L. V.
dc.contributor.authorOliveira, Larissa H.
dc.contributor.authorSuzuki, Carlos K.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLeite, Edson R.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2014-05-20T15:32:17Z
dc.date.available2014-05-20T15:32:17Z
dc.date.issued2008-03-01
dc.description.abstractNowadays solid state chemists have the possibility of work with low temperature strategies to obtain solid state materials with appropriate physical and chemical properties for useful technological applications. Photonic core shell materials having a core and shell domains composed by a variety of compounds have been synthesized by different methods. In this work we used silica-germania soot prepared by vapor-phase axial deposition as a core where a nanoshell of Eu2O3 was deposited. A new sol-gel like method was used to obtain the Eu2O3 nanoshell coating the SiO2-GeO2 particles, which was prepared by the polymeric precursor method. The photophysical properties of Eu3+ were used to obtain information about the rare earth surrounding in the SiO2-GeO2@Eu2O3 material during the sintering process. The sintering process was followed by the luminescence spectra of Eu3+ and all the samples present the characteristic emission related to the D-5(0) -> F-7(J) (J=0, 1, 2, 3 and 4). The ratios of the D-5(0) -> F-7(2)/D-5(0) -> F-7(1) emission intensity for the SiO2-GeO2@Eu2O3 systems were calculated and it was observed an increase in its values, indicating a low symmetry around the Eu3+ as the temperature increases.en
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Chem, BR-13560905 São Carlos, Sao Paolo, Brazil
dc.description.affiliationUNESP, Inst Chem, BR-14801970 Araraquara, Sao Paolo, Brazil
dc.description.affiliationUniv Estadual Campinas, Fac Mech Engn, BR-13083970 Campinas, Sao Paolo, Brazil
dc.description.affiliationUnespUNESP, Inst Chem, BR-14801970 Araraquara, Sao Paolo, Brazil
dc.format.extent541-545
dc.identifierhttp://dx.doi.org/10.1007/s10895-007-0297-7
dc.identifier.citationJournal of Fluorescence. New York: Springer/plenum Publishers, v. 18, n. 2, p. 541-545, 2008.
dc.identifier.doi10.1007/s10895-007-0297-7
dc.identifier.issn1053-0509
dc.identifier.urihttp://hdl.handle.net/11449/41228
dc.identifier.wosWOS:000253896400035
dc.language.isoeng
dc.publisherSpringer/plenum Publishers
dc.relation.ispartofJournal of Fluorescence
dc.relation.ispartofjcr1.665
dc.relation.ispartofsjr0,391
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjecteuropiumen
dc.subjectluminescenceen
dc.subjectSiO2-GeO2en
dc.subjectcore shellen
dc.subjectnanocoatingen
dc.titleSiO2-GeO2 soot preform as a core for Eu2O3 nanocoating: Synthesis and photophysical studyen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer/plenum Publishers
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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