Luminescent Centers
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Síntese, Caracterização Estrutural e Propriedades Luminescentes de Complexos de Lantanídeos (III) com Hidrazonas e Semicarbazonas derivadas da 2,6-Diformilpiridina e com Triazenos 1-óxidos. / Synthesis, Structural Characterization and Luminescent Properties of Complexes of Lanthanides (III) with Hydrazones and Semicarbazones derived from 2,6-diformylpyridine and Triazenes 1-oxides.
Lanthanide complexes with ligands containing oxygen and nitrogen as donor atoms have been investigated in this study aiming to explore the coordinative behavior of metals with high coordination numbers, as well as a study of luminescence properties of new complexes. The chosen ligands were hydrazones and semicarbazones derived from 2,6-diformylpyridine and t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 201103
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2. Tuning luminescence of 3d transition- metal doped quantum particles: Ni+2: CdS and Fe+3: CdS
The room- temperature photoluminescence of Cd1- xMxS (M=Ni, Fe) nanoparticles were investigated. Compared with the photoluminescence of CdS which peaks at 475 nm, the photoemission of CdS:Fe nanoparticles was peaking at 537 nm because of Fe acting as luminescent centers. On the other hand, the green emission (503 nm) of CdS:Ni attributed to the ¹T2g(D)→ �
Brazilian Journal of Physics. Publicado em: 2010-09
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3. Luminescence dosimeter based on magnesium doped aluminum oxide: production and characterization. / Confecção e caracterização de dosímetro luminescente de óxido de alumínio dopado com magnésio.
The aim of the present work is to obtain and characterize luminescent dosimeters made of magnesium doped aluminium oxide, for ionizing radiation dosimetry purposes. The material is produced by Pechini Method (US Patent 3.330.697, 1967), starting from a polymer that generates powder ceramic, after firing at predetermined temperatures. Dosimetric measurements
Publicado em: 2008
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4. Luminescence and paramagnetic centers in antigorite and Lizardite, two menbers of serpentine group: a comparative study / Estudo comparativo entre as propriedades dos centros luminescentes e paramagnéticos da antigorita e da lizardita do grupo da SERPENTINA: `Mg IND.3´[Si IND.2´`O IND.5´]`(OH) IND.4´
In this work, we are describing crystals luminescent properties of Antigorite (monoclinic, Mg3-x[Si2O5](OH)4-2x) and Lizardite (triclinic, Mg3[(Si,Fe)2O5](OH)4). They were studied simultaneously applying several techniques, like: Thermoluminescence (TL), Optical Absorption (OA), Electron Paramagnetic Resonance (EPR), X-rays diffraction and Inductively Couple
Publicado em: 2008
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5. Study of thermoluminescence response of SolonÃpole (CE) quartz sensitized by heat treatments and high doses of gamma radiation / Estudo da sensibilizaÃÃo da resposta termoluminescente do quartzo de SolonÃpole (CE) por tratamentos tÃrmicos e altas doses de radiaÃÃo gama
A sensibilizaÃÃo da resposta termoluminescente (TL) do quartzo natural foi muito estudada visando a dataÃÃo arqueolÃgica e a dosimetria retrospectiva. Embora a curva de emissÃo TL do quartzo apresente vÃrios picos, apenas a sensibilizaÃÃo do pico que ocorre a aproximadamente 100ÂC foi investigada em profundidade. Trabalhos recentes mostraram que a
Publicado em: 2008
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6. Zinc oxide films doped with aluminium or europium: preparation and characterization. / Filmes de óxido de zinco dopado com alumínio ou európio: preparação e caracterização.
The interest in the preparation of thin films by the sol-gel process has increased in last years due to the high quality of the films, low cost of the organic precursors and the great technological importance. Depending on the preparation conditions and dopant species, it is possible to obtain films with piezelectric, luminescent, isolating, conductive and s
Publicado em: 2001