Order-disorder degree of self-assembled clusters: Influence on photoluminescence emission and morphology of BaxSr1-xTiO3 nanocrystals

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSouza, A. E.
dc.creatorSilva, R. A.
dc.creatorSantos, G. T. A.
dc.creatorTeixeira, S. R.
dc.creatorAntonio, S. G.
dc.creatorMoreira, M. L.
dc.creatorVolanti, D. P.
dc.creatorLongo, Elson
dc.date2014-05-20T13:23:08Z
dc.date2016-10-25T16:44:14Z
dc.date2014-05-20T13:23:08Z
dc.date2016-10-25T16:44:14Z
dc.date2011-10-06
dc.date.accessioned2017-04-05T19:56:44Z
dc.date.available2017-04-05T19:56:44Z
dc.identifierChemical Physics Letters. Amsterdam: Elsevier B.V., v. 514, n. 4-6, p. 301-306, 2011.
dc.identifier0009-2614
dc.identifierhttp://hdl.handle.net/11449/6936
dc.identifierhttp://acervodigital.unesp.br/handle/11449/6936
dc.identifier10.1016/j.cplett.2011.08.045
dc.identifierWOS:000295831700021
dc.identifierhttp://dx.doi.org/10.1016/j.cplett.2011.08.045
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/855744
dc.descriptionBaxSr1-xTiO3 was prepared by the microwave-assisted hydrothermal method. The ceramic powder was characterized by X-ray diffraction, Raman, ultraviolet-visible and photoluminescence (PL) spectroscopies and scanning electron microscopy (FE-SEM). The results confirm that the powders consist of perovskite-type cubic and tetragonal crystalline structures. The Raman data show bands characterizing a multi-phonon process, suggesting the presence of defects, due to partial Sr/Ba substitution, resulting in different distorted clusters. A broad-band PL emission (blue light region) confirms the existence of these defects, which together with the results of ultraviolet-visible spectroscopy suggests non-uniformity in band structure. The distinct morphologies observed are associated with different clusters organization during the nucleation and growth of the BaxSr1-xTiO3 nanoparticles. (C) 2011 Elsevier B. V. All rights reserved.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherElsevier B.V.
dc.relationChemical Physics Letters
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleOrder-disorder degree of self-assembled clusters: Influence on photoluminescence emission and morphology of BaxSr1-xTiO3 nanocrystals
dc.typeOtro


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