No abstract

Yttrium oxide nanoparticles doped with 2.0wt% Eu(Eu@Y 2 O 3)were synthesized via thesurfactant-assembly method. The average diameter of Eu@Y 2 O 3 (d av) depends on the alkyl chain number (N) of the sodium alkyl sulfates employedas surfactants. Using surfactants with N = 8, 10, and 12, Eu@Y 2 O 3 with d av = 35, 200, and 500 nm, respectively were obtained. Such changes in d av are ascribed to the difference in the micelle aggregation numbers, supporting the use ofrare-earthions in the assembly. TheEu@Y 2 O 3 particles synthesized presently emitted through Eu 3+ transitionsunder UV excitation of Y 2 O 3 , making them applicable to nanoemitters.