Abstract
ZrO2:Eu3+ nanocrystals ranging from 17 to 43 nm were prepared by the facile precipitation method with a hydrothermal process. The crystallite size was strongly influenced by the solvent composition and enhanced with the presence of surfactant. The use of ethanol combined with surfactant stabilizes 50 wt% of the monoclinic phase, while the use of water only results in 100 wt% tetragonal phase. 80% of nanobelts were obtained preparing the sample with ethanol and surfactant as a results of the self-assembly of nanoparticles. The photoluminescence emission peak centered at 606 nm dominates the emission band for nanobelts, while for nanoparticles it is dominated by a peak centered at 612 nm. Such differences were explained in terms of the site symmetry occupying Eu3+ in the host that in turn depends on the crystalline phase. Changes in the intensity ratio I(612 nm)/I(606 nm) is proposed as a tool to analyzing changes in the monoclinic/tetragonal phase composition. The calculated asymmetry ratio R=7F2/7F1∼1.2 suggest a high degree of crystallinity of the prepared samples.
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López-Luke, T., De la Rosa, E., Romero, V.H. et al. Solvent and surfactant effect on the self-assembly and luminescence properties of ZrO2:Eu3+ nanoparticles. Appl. Phys. B 102, 641–649 (2011). https://doi.org/10.1007/s00340-010-4233-1
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DOI: https://doi.org/10.1007/s00340-010-4233-1