Now showing items 1-6 of 6
Nanoparticle characterization of Er-doped SnO2 pellets obtained with different pH of colloidal suspension
(Journal of Applied Physics, 2013-08-28) [Artigo]
SnO2:2 at. %Er xerogel samples were obtained by sol-gel technique from colloidal suspensions with distinct pHs. The evaluation of critical regions inside the nanocrystallite is fundamental for the interpretation of the ...
Nanostructured TiO2-based composites for light absorption
(Electroceramics Vi, 2014-01-01) [Trabalho apresentado em evento]
Metal oxidenanocomposites were prepared by two different routes: polyol and sol-gel. Characterization by X ray diffraction showed that the first processproducesdirectly a two-phase material, while the sol-gelpowder never ...
Photoluminescence of Eu(3+) ion in SnO(2) obtained by sol-gel
(Journal of Materials Science, 2008-01-01) [Artigo]
Photoluminescence data of Eu-doped SnO(2) xerogels are presented, yielding information on the symmetry of Eu(3+) luminescent centers, which can be related to their location in the matrix: at lattice sites, substituting to ...
Rare earth centers properties and electron trapping in SnO2 thin films produced by sol-gel route
(Journal of Non-Crystalline Solids, 2008-11-01) [Artigo]
Some very relevant optical. electrical, and structural properties of SnO2 doped with rare-earth ions Er3+ and Eu3+ are presented. Films are produced by the sol-gel-clip coating process, and may be described as a combination ...
Raman and photoluminescence of Er3+-doped SnO2 obtained via the sol-gel technique from solutions with distinct pH
(Optical Materials, 2010-11-01) [Artigo]
Raman and infrared photoluminescence measurements are carried out for Er3+-doped SnO2 pellets (hard-pressed powders) obtained by the sol-gel technique from colloidal suspensions with distinct pH. Raman data indicate that ...
Temperature Dependent Luminescence Spectra of Synthetic and Natural Alexandrite
(Materials Sciences and Applications, 2011) [Artigo]
Results of photoluminescence measurements for natural and synthetic alexandrite (BeAl2O4:Cr3+) are presented, where the samples are excited by the 488 nm line of an Ar+ laser, at different temperatures. The main issue is ...