G. Maciel

Publications127
h-index30
Citations2,903
Highly Influential Citations12
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Structural and spectroscopic analyses of europium doped yttrium oxyfluoride powders prepared by combustion synthesis
A facile widely spread technique employed to produce low-cost high-yield oxide powders, combustion synthesis, was used to prepare yttrium oxyfluoride crystalline ceramic powders. The structure of the…
Er3+-doped BaTiO3 nanocrystals for thermometry: Influence of nanoenvironment on the sensitivity of a fluorescence based temperature sensor
Frequency upconverted emissions centered at 526 and 547 nm from two thermodynamically coupled excited states of Er3+ doped in BaTiO3 nanocrystals were recorded in the temperature range from 322 to…
Upconversion properties of a transparent Er3+–Yb3+ co-doped LaF3–SiO2 glass-ceramics prepared by sol–gel method
Blue cooperative upconversion in Yb3+-doped multicomponent sol-gel-processed silica glass for three-dimensional display
We propose using blue cooperative upconversion of ytterbium (Yb3+) ions produced by a one-color one-beam pumping scheme for a three-dimensional fluorescence display. The results are presented using a…
Optical limiting behavior of a glass–ceramic containing sodium niobate crystallites
The nonlinear absorption properties of a glass–ceramic containing ferroelectric sodium niobate (NaNbO3) crystallites were investigated. Two- and three-photon absorption coefficients were determined…
Temperature sensor based on frequency upconversion in Er/sup 3+/-doped fluoroindate glass
We describe the characterization of a temperature sensor based on the infrared-to-visible frequency upconversion process excited in a sample of Er/sup 3+/-doped fluoroindate glass. The present…
Spectroscopic analysis of Eu3+ -and Eu3+:Yb3+-doped yttrium silicate crystalline powders prepared by combustion synthesis
Yttrium silicate powders doped with Eu3+ and codoped with Eu3+ and Yb3+ were prepared by combustion synthesis. The x-ray powder diffraction data showed the presence of Y2SiO5 and Y2Si2O7 crystalline…
Influence of impurities on the luminescence of Er 3+ doped BaTiO 3 nanophosphors
The influence of the presence of barium carbonate (BaCO3) phase on the luminescence properties of barium titanate nanocrystals (BaTiO3) powders was investigated. Structural and optical…
Three-photon upconversion and optical thermometry characterization of Er3+:Yb3+ co-doped yttrium silicate powders
Photoluminescence analysis of α-Al2O3 powders doped with Eu3+ and Eu2+ ions
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