Effect of mechanical milling on photoluminescence of gamma-alumina nanoparticles.
The effect of mechanical alloying on the photoluminescence behavior of gamma-Al2O3 nanopowder was studied. Two emission peaks centered at 343 and 378 nm and a broad emission band ranging between 400-600 nm have been observed. It is found that the intensity of the two emission peaks decreases with ball-milling time, while that the broad band remains un-change. These results suggested that the two peaks are resulted from the surface defects that analogs of F+ centers, while the broad band is resulted from impurity.
Luo
Jinsong
J
Laboratory of Excited State Process, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130032, China.
Liu
Shufeng
S
Wang
Lidan
L
Fan
Yi
Y
Zhang
Ligong
L
Zhang
Peiping
P
An
Linan
L