Structure of redispersible SnO2 nanoparticles

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dc.contributor.authorBrito, GES
dc.contributor.authorFischer, H.
dc.contributor.authorCraievich, A. F.
dc.contributor.authorGoncalves, R. R.
dc.contributor.authorRibeiro, SJL
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionNatl Synchrotron Light Lab
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:22:00Z
dc.date.available2014-05-20T15:22:00Z
dc.date.issued2003-08-01
dc.description.abstractSuspensions of undoped SnO2 nanoparticles and containing Eu3+ ions were prepared by a sol-gel procedure. Using the classical synthesis method ( precipitation), the particles tend to grow by a coarsening process in order to minimize the surface free energy. This effect can strongly be reduced by the addition of an amide and surfactant during the synthesis, which decreases the surface free energy of the colloidal particles. These additives promote the formation of powders composed of very small primary particles formed by a crystallite of 10 Angstrom, and exhibit good redispersion properties. The local and long order structures of the redispersible powder were studied by X-rays absorption spectroscopy at Sn L-I edge and X-rays diffraction, respectively. The structure of the colloidal aggregates in suspension was investigated by small angle X-rays scattering (SAXS). SAXS results indicate the sol are composed by a polidisperse system of hard spheres resulting of agglomeration of the primary particles and their size increasing by agglomeration for progressively higher Eu3+ content.en
dc.description.affiliationUniv São Paulo, Inst Phys, BR-05315 São Paulo, Brazil
dc.description.affiliationNatl Synchrotron Light Lab, Campinas, SP, Brazil
dc.description.affiliationUNESP, Inst Chem, Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Chem, Araraquara, SP, Brazil
dc.format.extent45-50
dc.identifierhttp://dx.doi.org/10.1023/A:1025680918761
dc.identifier.citationJournal of Sol-gel Science and Technology. Dordrecht: Kluwer Academic Publ, v. 28, n. 1, p. 45-50, 2003.
dc.identifier.doi10.1023/A:1025680918761
dc.identifier.issn0928-0707
dc.identifier.urihttp://hdl.handle.net/11449/33071
dc.identifier.wosWOS:000185229200006
dc.language.isoeng
dc.publisherKluwer Academic Publ
dc.relation.ispartofJournal of Sol-Gel Science and Technology
dc.relation.ispartofjcr1.745
dc.relation.ispartofsjr0,477
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectSnO2 nanoparticlespt
dc.subjectSAXSpt
dc.subjectEXAFSpt
dc.subjectXRDpt
dc.titleStructure of redispersible SnO2 nanoparticlesen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
dcterms.rightsHolderKluwer Academic Publ

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