Luminescent nano-composites generated from a spray
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Coorientador
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Curso de graduação
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Editor
Elsevier B.V.
Tipo
Artigo
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Resumo
The spray-pyrolysis (SP) synthesis technique has been employed to obtain SiO2:Eu3+ and gamma-AlOOH:Eu3+, It was possible to obtain sub-micrometric spherical particles of SiO2 with luminescent Eu3+ ions bonded to the silica surface or embedded in amorphous silica beads, by controlling the synthesis and annealing process. Boehmite y-AlOOH doped with Eu3+ nanoparticles were synthesized by SP at moderate temperature (200 degrees C) with Eu3+ ions bonded to the surface hydroxyls of the boehmite nanocrystals. Luminescent nanocomposites were obtained by controlled reaction of gamma-AlOOH:Eu3+ nanocrystals with ASN (asparagine). In these nano-composites, the Eu3+ are held at the surface of the boehmite nanocrystals and partially shielded from interactions with additional luminescence quenchers (hydroxyl groups, water molecules). (C) 2008 Elsevier B.V. All rights reserved.
Descrição
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Nano-composites, Nanoparticles, Optical properties, Luminescence, Silica, Rare-earths in glasses
Idioma
Inglês
Citação
Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 354, n. 42-44, p. 4860-4864, 2008.
