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Europium-doped mesoporous titania thin films: rare-earth locations and emission fluctuations under illumination

dc.contributor.authorLEROY, Céline Marie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCARDINAL, Thierry
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorJUBERA, Veronique
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRÉGUER-DELAPIERRE, Mona
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAJIMEL, Jérôme
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMANAUD, Jean-Pierre
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorBACKOV, Rénal
hal.structure.identifierLaboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) [LCMCP (site Paris VI)]
dc.contributor.authorBOISSIÈRE, Cédric
hal.structure.identifierLaboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) [LCMCP (site Paris VI)]
dc.contributor.authorGROSSO, David
hal.structure.identifierLaboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) [LCMCP (site Paris VI)]
dc.contributor.authorSANCHEZ, Clément
hal.structure.identifierLaboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) [LCMCP (site Paris VI)]
dc.contributor.authorVIANA, Bruno
hal.structure.identifierLaboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) [LCMCP (site Paris VI)]
dc.contributor.authorPELLÉ, Fabienne
dc.date.issued2008
dc.identifier.issn1439-4235
dc.description.abstractEnHerein, EuIII-doped 3D mesoscopically ordered arrays of mesoporous and nanocrystalline titania are prepared and studied. The rare-earth-doped titania thin films - synthesized via evaporation-induced self-assembly (EISA) - are characterized by using environmental ellipsoporosimetry, electronic microscopy (i.e. high-resolution scanning electron microscopy, HR-SEM, and transmission electron microscopy, HR-TEM), X-ray diffraction, and luminescence spectroscopy. Structural characterizations show that high europium-ion loadings can be incorporated into the titanium-dioxide walls without destroying the mesoporous arrangement. The luminescence properties of EuIII are investigated by using steady-state and time-resolved spectroscopy via excitation of the EuIII ions through the titania host. Using EuIII luminescence as a probe, the europium-ion sites can be addressed with at least two different environments within the mesoporous framework, namely, a nanocrystalline environment and a glasslike one. Emission fluctuations (5D07F2) are observed upon continuous UV excitation in the host matrix. These fluctuations are attributed to charge trapping and appear to be strongly dependent on the amount of europium and the level of crystallinity.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enLanthanoids
dc.subject.enMesoporous materials
dc.subject.enNanocrystallites
dc.subject.enTitania
dc.subject.enThin films
dc.title.enEuropium-doped mesoporous titania thin films: rare-earth locations and emission fluctuations under illumination
dc.typeArticle de revue
dc.identifier.doi10.1002/cphc.200800328
dc.subject.halChimie/Matériaux
bordeaux.journalChemPhysChem
bordeaux.page2077-2084
bordeaux.volume9
bordeaux.issue14
bordeaux.peerReviewedoui
hal.identifierhal-00326105
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00326105v1
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