Nanostructured Lanthanide-Doped Lu2O3 Obtained by Propellant Synthesis

Lu1.98Ln0.02O3 (Ln = Nd, Eu, and Er) powders obtained by propellant synthesis were characterized using XRD, SAXS, TEM, and SEM. Samples have a very porous, open morphology with fractal scaling properties. The building blocks of the fractal aggregates are 60−90 nm lanthanide-doped cubic Lu2O3 crystal...

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Bibliographic Details
Published in:Chemistry of materials 2004-04, Vol.16 (7), p.1330-1335
Main Authors: Polizzi, Stefano, Bucella, Stefania, Speghini, Adolfo, Vetrone, Fiorenzo, Naccache, Rafik, Boyer, John C, Capobianco, John A
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
General and physical chemistry
Physicochemistry of polymers
Physics
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Summary:Lu1.98Ln0.02O3 (Ln = Nd, Eu, and Er) powders obtained by propellant synthesis were characterized using XRD, SAXS, TEM, and SEM. Samples have a very porous, open morphology with fractal scaling properties. The building blocks of the fractal aggregates are 60−90 nm lanthanide-doped cubic Lu2O3 crystalline particles, which exhibit changes in the lattice parameter proportional to the lanthanide ionic radius. The NIR luminescence spectrum of nanocrystalline Lu2O3:Nd3+ was measured and emission was observed from the 4F3/2 excited state to the 4I J (9/2, 11/2, 13/2, 15/2) state. The spectral features are very similar to those of a bulk material of identical composition prepared for comparison, though with a noticeable difference in the relative intensity of the 4F3/2 → 4I9/2 and 4F3/2 → 4I11/2 transitions. The spectroscopic-quality parameter (X) for nanocrystalline samples was calculated and was found to be higher than for the bulk.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm0351240