Non-leachable highly luminescent ordered mesoporous SiO2 spherical particles

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dc.contributor.authorRocha, L. A. [UNESP]
dc.contributor.authorCaiut, J. M. A. [UNESP]
dc.contributor.authorMessaddeq, Younes [UNESP]
dc.contributor.authorRibeiro, Sidney José Lima [UNESP]
dc.contributor.authorMartines, M. A. U.
dc.contributor.authorFreiria, J. do C.
dc.contributor.authorDexpert-Ghys, J.
dc.contributor.authorVerelst, M.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Mato Grosso do Sul (UFMS)
dc.contributor.institutionCNRS
dc.date.accessioned2014-05-20T15:32:15Z
dc.date.available2014-05-20T15:32:15Z
dc.date.issued2010-04-16
dc.description.abstractOrdered mesoporous highly luminescent SiO2 particles have been synthesized by spray pyrolysis from solutions containing tetraethylorthosilicate (TEOS) and either cetyltrimethylammonium bromide (CTAB) or the block copolymer Pluronic F-68 as structure-directing agents. Rhodamine B (RhB)-containing samples were prepared by using a simple wet impregnation method followed by the growing of a second silica shell in order to prevent leaching of the dye. The obtained materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder x-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-vis) and photoluminescence (PL). Powders with polydisperse spherical grains were obtained displaying an ordered hexagonal array of mesochannels. Luminescence results reveal that RhB molecules have been successfully encapsulated into the channels of mesoporous particles as monomeric species and that a well-defined silica coating hindered dye leaching.en
dc.description.affiliationUniv Estadual Paulista, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUniversidade Federal de Mato Grosso do Sul (UFMS), Dept Chem, BR-79074460 Campo Grande, Brazil
dc.description.affiliationCNRS, Ctr Elaborat Mat & Etud Struct, F-31055 Toulouse 4, France
dc.description.affiliationUnespUniv Estadual Paulista, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipCEMES (Centre d'Elaboration de Materiaux et d'Etudes Structurales)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent6
dc.identifierhttp://dx.doi.org/10.1088/0957-4484/21/15/155603
dc.identifier.citationNanotechnology. Bristol: Iop Publishing Ltd, v. 21, n. 15, p. 6, 2010.
dc.identifier.doi10.1088/0957-4484/21/15/155603
dc.identifier.issn0957-4484
dc.identifier.lattes2998503841917815
dc.identifier.lattes6446047463034654
dc.identifier.orcid0000-0003-3286-9440
dc.identifier.urihttp://hdl.handle.net/11449/41206
dc.identifier.wosWOS:000275901500016
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofNanotechnology
dc.relation.ispartofjcr3.404
dc.relation.ispartofsjr1,079
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleNon-leachable highly luminescent ordered mesoporous SiO2 spherical particlesen
dc.typeResumo
dcterms.licensehttp://iopscience.iop.org/info/page/openaccess
dcterms.rightsHolderIop Publishing Ltd
unesp.author.lattes2998503841917815
unesp.author.lattes6446047463034654
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Inorgânica - IQ