Morphology and photoluminescence of silica nanowires synthesized by thermal evaporation.
Gallium was intentionally used to catalyze the growth of brushhead-like and feather-like silica nanowires through thermal evaporation. Due to the different amount of Ga element deposited on the two silicon substrates, the growth of brushhead-like structures was catalyzed by Ga on one silicon substrate, while the feather-like structures were self-assembled on the other silicon substrate. Photoluminescence analysis shows that the brushhead-like structures have two emission peaks centered at 397 nm and 457 nm, and the feather-like structures have only one emission peak centered at 406 nm. The growth rate determined by the Ga catalyst of the brushhead-like and feather-like structures would affect the structure defects in the silica nanowires, which are responsible for their difference in optical properties.
School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, Anhui 230009, PR China.
Qiang
Q
Li
Yiqing
Y
Chen
Chunyan
C
Wu
Li
L
Wang
Yongqiang
Y
Yu