Luminescence of Tb(3+) doped TeO(2)-ZnO-Na(2)O-PbO glasses containing silver nanoparticles
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
17/04/2012
17/04/2012
2008
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Resumo |
Luminescence properties of Tb(3+) doped TeO(2)-ZnO-Na(2)O-PbO glasses containing silver nanoparticles (NPs) were investigated. The absorption band due to the surface plasmon resonance in the NPs was observed. Its amplitude increases with the heat treatment of the samples that controls the nucleation of the NPs. Tb(3+) emission bands centered at approximate to 485, approximate to 550, approximate to 585, and approximate to 623 nm were detected for excitation at 377 nm. The whole spectrum is intensified by the appropriate annealing time of the samples. Enhancement by approximate to 200% of the Tb(3+) luminescence at 550 nm was observed for samples annealed at 270 degrees C during 62 h. This enhancement effect is due to the local field amplitude that increases with the amount of silver NPs and their aggregates. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3010867] Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) Laboratorio de Microscopia Eletronica (IFUSP) |
Identificador |
JOURNAL OF APPLIED PHYSICS, v.104, n.9, 2008 0021-8979 http://producao.usp.br/handle/BDPI/14730 10.1063/1.3010867 |
Idioma(s) |
eng |
Publicador |
AMER INST PHYSICS |
Relação |
Journal of Applied Physics |
Direitos |
openAccess Copyright AMER INST PHYSICS |
Palavras-Chave | #UP-CONVERSION LUMINESCENCE #TELLURITE GLASSES #2-PHOTON ABSORPTION #NM #Physics, Applied |
Tipo |
article original article publishedVersion |