Controlled shape growth of Eu- or Tb-doped luminescent Gd2O3 colloidal nanocrystals

Controlled-shape synthesis of rare earth doped gadolinium oxide (Gd(2)O(3):Eu(3+) or Tb(3+)) colloidal nanocrystals by non-hydrolytic high temperature (approximately 290 degrees C) solution growth methods is reported. Various shapes of Gd(2)O(3) nanocrystals were synthesized, including spheres, plat...

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Bibliographic Details
Published in:Journal of colloid and interface science 2009-03, Vol.331 (1), p.236-242
Main Authors: SEO, Sooyeon, YANG, Heesun, HOLLOWAY, Paul H
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
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Summary:Controlled-shape synthesis of rare earth doped gadolinium oxide (Gd(2)O(3):Eu(3+) or Tb(3+)) colloidal nanocrystals by non-hydrolytic high temperature (approximately 290 degrees C) solution growth methods is reported. Various shapes of Gd(2)O(3) nanocrystals were synthesized, including spheres, plates, and curved rods. The nanocrystal shape was shown to be dependent on the synthesis parameters, such as type of metal precursor and surfactant, and their concentration ratio. The photoluminescence intensity from rare earth doped Gd(2)O(3) was shown to increase from nanoplates to nanospheres, which is discussed in terms of doping efficiency, crystal structure, and ratio of surface to volume.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2008.11.016