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Defect-induced photoluminescence of powdered silica glass

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dc.contributor.authorPizani, P. S.
dc.contributor.authorJoya, M. R.
dc.contributor.authorPontes, F. M. [UNESP]
dc.contributor.authorSantos, L. P S
dc.contributor.authorGodinho, M.
dc.contributor.authorLeite, E. R.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:22:49Z
dc.date.available2014-05-27T11:22:49Z
dc.date.issued2008-03-27
dc.description.abstractVisible photoluminescence was generated in standard soda-lime-silica glass powder, mechanically milled in a high-energy attrition mill. The broad emission band maximum shows a linear dependence on the exciting wavelength, suggesting the possibility to tune the PL emission. The photoluminescence was attributed to defect generation related to unsatisfied chemical bonds due to the high surface area. Raman scattering and ultraviolet-visible optical reflectance measurements corroborate this assertion. Transmission electron microscopy measurements indicate that the powder is composed by nanocrystallites with about 10-20 nanometers immersed in an amorphous media.en
dc.description.affiliationDepartamento de Física Universidade Federal de São Carlos, Caixa Postal 676, 13565-905 São Carlos, São Paulo
dc.description.affiliationDepartamento de Química Faculdade de Ciências Universidade Estadual Paulista, Av. Luis E. C. Coube, 14-01, Bauru, São Paulo
dc.description.affiliationDepartamento de Química Universidade Federal de São Carlos, Caixa Postal 676, 13565-905 São Carlos, São Paulo
dc.description.affiliationUnespDepartamento de Química Faculdade de Ciências Universidade Estadual Paulista, Av. Luis E. C. Coube, 14-01, Bauru, São Paulo
dc.format.extent479-484
dc.identifierhttp://dx.doi.org/10.4028/www.scientific.net/DDF.273-276.479
dc.identifier.citationDefect and Diffusion Forum, v. 273-276, p. 479-484.
dc.identifier.doi10.4028/www.scientific.net/DDF.273-276.479
dc.identifier.issn1012-0386
dc.identifier.scopus2-s2.0-40949144941
dc.identifier.urihttp://hdl.handle.net/11449/70350
dc.language.isoeng
dc.relation.ispartofDefect and Diffusion Forum
dc.relation.ispartofsjr0,129
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAttrition mill
dc.subjectPhotoluminescence
dc.subjectSilica glass
dc.subjectSurface defects
dc.subjectEmission band
dc.subjectHigh-energy attrition mill
dc.subjectOptical reflectance measurements
dc.subjectCrystal defects
dc.subjectMechanical alloying
dc.subjectPowder metallurgy
dc.subjectReflectometers
dc.subjectTransmission electron microscopy
dc.subjectFused silica
dc.titleDefect-induced photoluminescence of powdered silica glassen
dc.typeTrabalho apresentado em evento
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências, Baurupt
unesp.departmentQuímica - FCpt

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Bauru - FC - Faculdade de Ciências