Optical properties of B2O3–CaF2 glass-ceramics doped with silver nanoparticles and praseodymium ions

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidad de Ibagué-
Autor(es): dc.contributorUniversidade Federal de Pernambuco (UFPE)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorNaranjo, Luz Patricia-
Autor(es): dc.creatorOliveira, Nathália Talita C.-
Autor(es): dc.creatorKassab, Luciana R.P. [UNESP]-
Autor(es): dc.creatorde Araújo, Cid B.-
Data de aceite: dc.date.accessioned2022-02-22T00:47:03Z-
Data de disponibilização: dc.date.available2022-02-22T00:47:03Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-10-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2021.118225-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206424-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206424-
Descrição: dc.descriptionWe report on the synthesis and optical experiments with borate glass-ceramics (B2O3–CaF2 glass enclosing CaF2 nanocrystals), either undoped or doped with praseodymium ions (Pr3+) and containing silver nanoparticles (Ag-NPs). The techniques of transmission electron microscopy, X-rays diffraction, linear optical absorption, and photoluminescence (PL), were used to characterize the samples prepared. The glass samples, prepared by using the diffusion method, were heat-treated for nucleation of CaF2 nanocrystals (CaF2–NCs) with cubic structure and dimensions of ~20 nm, and Ag-NPs (with sizes between ~2 and ~50 nm). Optical absorption and PL experiments were performed. The glass-ceramic with Ag-NPs, but without Pr3+, exhibited tenfold enhancement (~1000%) of the blue PL from the CaF2–NCs, in comparison with the samples without Ag-NPs. In the samples with Pr3+ the presence of Ag-NPs induced small enhancement of the absorption spectra in the blue region [Pr3+ transitions: 3H4→3PJ (J = 0, 1, 2), 1I6] and 75% increase of the emitted intensity in the red region (Pr3+ transitions: 1D2→3H4). On the other hand, the CaF2–NCs luminescence was totally quenched due to the presence of Pr3+. This effect was attributed to resonant energy-transfer from the CaF2–NCs to Pr3+. The phenomena observed in the experiments were understood considering the contributions of the local electric field in the vicinities of the Ag-NPs and processes of energy-transfer among the CaF2–NCs, Ag-NPs and Pr3+.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco-
Descrição: dc.descriptionFacultad de Ciencias Naturales y Matemáticas Universidad de Ibagué, Carrera 22 Calle 67 B/Ambalá-
Descrição: dc.descriptionPrograma de Pós-Graduação em Ciência de Materiais Universidade Federal de Pernambuco-
Descrição: dc.descriptionFaculdade de Tecnologia de São Paulo CEETEPS/UNESP-
Descrição: dc.descriptionDepartamento de Física Universidade Federal de Pernambuco-
Descrição: dc.descriptionFaculdade de Tecnologia de São Paulo CEETEPS/UNESP-
Idioma: dc.languageen-
Relação: dc.relationJournal of Luminescence-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectB2O3–CaF2 glasses-
Palavras-chave: dc.subjectBorate glass-ceramics-
Palavras-chave: dc.subjectCaF2 nanocrystals-
Palavras-chave: dc.subjectPr3+ions-
Palavras-chave: dc.subjectSilver nanoparticles-
Título: dc.titleOptical properties of B2O3–CaF2 glass-ceramics doped with silver nanoparticles and praseodymium ions-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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