title: Preparation and up-conversion luminescence of 8 nm rare-earth doped fluoride nanoparticles.
abstract: Free-standing, 8 nm diameter, rare-earth doped nanoparticles Re(10)Pb(25)F(65) have been prepared, where Re stands for either single rare-earth ion, such as Er(3+), Yb(3+), Eu(3+), Dy(3+), Ho(3+), Tm(3+) or combinations of those ions. The nanoparticles have been extracted by chemical etching from the oxyfluoride nano-glass-ceramics template and analyzed by transmission electron microscope with energy dispersion spectroscopy. The nanoparticles show durable up-conversion photoluminescence, which is neither concentration nor impurity quenched after 6 months ageing in ambient atmosphere. High doping levels in these nanoparticles ensure high, up to 15%, quantum yield of up-conversion luminescence.
authors.affiliation: INPAC-Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium. Victor.Tikhomirov@fys.kuleuven.be
authors.forename: V K
authors.initials: VK
authors.lastname: Tikhomirov
authors.forename: M
authors.initials: M
authors.lastname: Mortier
authors.forename: P
authors.initials: P
authors.lastname: Gredin
authors.forename: G
authors.initials: G
authors.lastname: Patriarche
authors.forename: C
authors.initials: C
authors.lastname: Görller-Walrand
authors.forename: V V
authors.initials: VV
authors.lastname: Moshchalkov
mesh_terms: D003460:Crystallization / Q000379:methods; D005459:Fluorides / Q000737:chemistry*; D008163:Luminescent Measurements; D008422:Materials Testing; D008674:Metals, Rare Earth / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size
chemical_list: D008674:Metals, Rare Earth; D005459:Fluorides