Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 451, Issue 1-2, Pages 563-566Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.04.111
Keywords
nanostructured materials; optical materials; rare-earth alloys and compounds; chemical synthesis; nanofabrication
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PbF2:Yb-Er nanoparticles were synthesized by two different ways: a pseudo-micellar route and the selective dissolution of the oxide glassy matrix of an oxyfluoride composite glass-ceramic obtained by Yb-Er induced nucleation of PbF2 inside the GeO2:PbO:PbF2 glass. Both nanoparticles exhibit strong visible up-conversion fluorescence after infrared excitation. S-4(3/2) level lifetime of Er3+ ions reflects the high specific surface of the particles and their ability to adsorb quenching centres. (c) 2007 Elsevier B.V. All rights reserved.
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