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dc.contributor.authorRosa, Ieda L. V.
dc.contributor.authorOliveira, Larissa H.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.identifier.citationJournal of Fluorescence. New York: Springer/plenum Publishers, v. 21, n. 3, p. 975-981, 2011.
dc.description.abstractIn this work, a SiO2 spherical were prepared by the Stober Method and then recovered with a single layer of Eu2O3 oxide (SiO2@Eu2O3) obtained by the Polymeric Precursor Method. The SiO2@Eu2O3 powder was heated treated at 100, 300, 400, 500 and 800 A degrees C. The samples were characterized by the Scanning Electonic Microscopy (SEM), Thermal Analysis (TGA/DTA), and the luminescent properties of the SiO2@Eu2O3 powders were studied by their emission and excitation spectra as well as by the lifetime measurements of the Eu3+ D-5(0) -> aEuro parts per thousand F-7(2) transition. The SEM analysis shows that the silica prepared by the Stober Method is spherical with a particle size of 460 nm. The emission spectra of the SiO2@Eu2O3 powders presented the Eu3+ characteristics bands related to the D-5(0) -> aEuro parts per thousand F-7(J) (J = 0, 1, 2, 3, 4) transitions at 577, 591, 616, 649 and 695 nm, respectively. The band related to the D-5(0) -> aEuro parts per thousand F-7(2) transition is the most intense in the spectra, and its intensity decreases with the temperature enhancement. The decay curves of the SiO2@Eu2O3 samples presented monoexponential features, and the obtained lifetime values were higher than the Eu2O3 oxide. It was possible to conclude that the D-5(0) -> aEuro parts per thousand F-7(2) hypersensitive transition is strongly dependent on the Eu3+ surrounding.en
dc.publisherSpringer/plenum Publishers
dc.relation.ispartofJournal of Fluorescence
dc.sourceWeb of Science
dc.subjectPhotoluminescence propertiesen
dc.titleSynthesis and Photoluminescence Behavior of the Eu3+ Ions as a Nanocoating over a Silica Stober Matrixen
dcterms.rightsHolderSpringer/plenum Publishers
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationLIEC UFSCar, Dept Chem, BR-13560905 São Carlos, SP, Brazil
dc.description.affiliationLIEC UNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespLIEC UNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
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