Thin-walled Er3+:Y2O3 nanotubes showing up-converted fluorescence.
Up-converted red and green fluorescence has been measured in low-crystallinity Er3+:Y2O3 nanotubes upon IR excitation. A new preparation procedure for thin-walled erbium doped yttria nanotubes using alumina templates as shape defining tools and rare earth nitrates as precursors for a purely thermolytic production of erbium doped yttria was developed. The products with a diameter of approximately 40-50 nm and a wall thickness of only 6-8 nm showed up-converted fluorescence with green and red emission bands when excited at 815 nm. The fluorescence properties are compared to the ones of bulk erbium-doped yttria obtained from the same precursor system.
Erk
Christoph
C
Freie Univeristät Berlin, Institute for Chemistry and Biochemistry, Fabeckstrasse 34-36, 14195 Berlin, Germany.
Martin Caba
Sofia
S
Lange
Holger
H
Werner
Stefan
S
Thomsen
Christian
C
Steinhart
Martin
M
Berger
Andreas
A
Schlecht
Sabine
S