Ga-assisted synthesis and optical properties of ZnO submicron- and nanotowers.
Tower-like ZnO submicron- and nanostructures were synthesized by simply evaporating a mixture of Zn and Ga. Scanning electron microscopy and transmission electron microscopy observations showed that the regular hexagonal tower-like structure is likely to be made up in a layer-by-layer fashion and consist of sheets. According to our experiments, the amount of Ga has a large effect on their morphologies. The growth of such tower-like structures is ascribed to the vapor-solid mechanism. The introduction of Ga hinders the growth of ZnO along the [0001] direction, resulting in the formation of the novel tower-like structures. In addition, the photoluminescence of such structures shows a strong green-light emission.
Liang
Yao
Y
Department of Physics, Harbin Normal University, Harbin, 150080, People's Republic of China.
Zhang
Xitian
X
Qin
Li
L
Zhang
E
E
Gao
Hong
H
Zhang
Zhiguo
Z