title: Effect of mechanical milling on photoluminescence of gamma-alumina nanoparticles.
abstract: 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.
authors.affiliation: Laboratory of Excited State Process, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130032, China.
authors.forename: Jinsong
authors.initials: J
authors.lastname: Luo
authors.forename: Shufeng
authors.initials: S
authors.lastname: Liu
authors.forename: Lidan
authors.initials: L
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Fan
authors.forename: Ligong
authors.initials: L
authors.lastname: Zhang
authors.forename: Peiping
authors.initials: P
authors.lastname: Zhang
authors.forename: Linan
authors.initials: L
authors.lastname: An