Abstract We describe a facile procedure for the synthesis at low temperature (120 °C) of water-dispersible uniform YF3:Yb,Er up-conversion nanophosphors of various morphologies (rhombic and spheroidal) by homogeneous precipitation in polyol
solutions containing different lanthanide salts and an ionic liquid (1-butyl, 2-methylimidazolium tetrafluoroborate) as fluoride
source. It is shown that the shape of the obtained nanoparticles is mainly determined by the nature of both, the polyol and
the lanthanide precursors, which also affects to their colloidal stability in water suspensions. These morphological differences
are explained on the basis of a different mechanism of particle formation. The efficiency of the up-conversion processes in
the synthesized rhombic and spheroidal nanoparticles is also comparatively analyzed and the observed differences are justified
on the basis of the different impurities incorporated to the nanophosphors during their synthesis process.
solutions containing different lanthanide salts and an ionic liquid (1-butyl, 2-methylimidazolium tetrafluoroborate) as fluoride
source. It is shown that the shape of the obtained nanoparticles is mainly determined by the nature of both, the polyol and
the lanthanide precursors, which also affects to their colloidal stability in water suspensions. These morphological differences
are explained on the basis of a different mechanism of particle formation. The efficiency of the up-conversion processes in
the synthesized rhombic and spheroidal nanoparticles is also comparatively analyzed and the observed differences are justified
on the basis of the different impurities incorporated to the nanophosphors during their synthesis process.
- Content Type Journal Article
- Category Research Paper
- DOI 10.1007/s11051-009-9824-6
- Authors
- Nuria O. Nuñez, CSIC-US Instituto de Ciencia de Materiales de Sevilla Americo Vespucio 49 41092 Isla de la Cartuja, Sevilla Spain
- Marta Quintanilla, C-IV, Universidad Autónoma de Madrid Depto. Física de Materiales Madrid Spain
- Eugenio Cantelar, C-IV, Universidad Autónoma de Madrid Depto. Física de Materiales Madrid Spain
- Fernando Cussó, C-IV, Universidad Autónoma de Madrid Depto. Física de Materiales Madrid Spain
- Manuel Ocaña, CSIC-US Instituto de Ciencia de Materiales de Sevilla Americo Vespucio 49 41092 Isla de la Cartuja, Sevilla Spain
- Journal Journal of Nanoparticle Research
- Online ISSN 1572-896X
- Print ISSN 1388-0764
Alfa Chemistry employs more than 200 full time staff, of which approximate 80 are Ph.D. and M.S. chemists, specialized in synthetic chemistry, process optimization, and research. N-butyl-4-metylpyridinium tetrafluoroborate
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