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Proceedings Paper

Rare-earth-doped synthetic opals and inverse opals
Author(s): Luciano A. Bueno; Roberto Bertholdo; Djalma A. Barros Filho; Younes Messaddeq; Sidney J. L. Ribeiro
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Paper Abstract

Monodisperse spheres of silica and latex were obtained by a surfactant free styrene polimerization and the Stoeber method respectively. Controlling settling either by centrifugation or by dip-coating colloidal crystals could be obtained. Silica inverse opals were prepared by using the latex colloidal crystals as templates and TEOS/ethanol solution. Eu3+ containing silica spheres were obtained dispersing silica spheres in Eu(NO3)3 isopropanol solutions. Emission spectra suggest the formation of an amorphous Eu3+ containing phase well adhered at the spheres surface. The utilization of solutions of trifluoroacetates salts of Pb2+ and Eu3+ was observed to destroy the silica spherical pattern when samples are treated at 1000°C. In that case nanocrystals of PbF2 and amorphous silica were obtained after heat treatment

Paper Details

Date Published: 23 October 2002
PDF: 9 pages
Proc. SPIE 4804, Sol-Gel Optics VI, (23 October 2002); doi: 10.1117/12.456543
Show Author Affiliations
Luciano A. Bueno, Univ. Estadual Paulista (Brazil)
Roberto Bertholdo, Univ. Estadual Paulista (Brazil)
Djalma A. Barros Filho, Univ. Estadual Paulista (Brazil)
Younes Messaddeq, Univ. Estadual Paulista (Brazil)
Sidney J. L. Ribeiro, Univ. Estadual Paulista (Brazil)


Published in SPIE Proceedings Vol. 4804:
Sol-Gel Optics VI
Edward J. A. Pope; Helmut K. Schmidt; Bruce S. Dunn; Shuichi Shibata, Editor(s)

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