Monte Carlo study for the growth of alpha-Fe2O3 nanowires synthesized by thermal oxidation of iron.
The growing mechanism of alpha-Fe(2)O(3) nanowires synthesized by thermal oxidation of iron is studied by the Monte Carlo method. Using a model of diffusion, the effects of synthesizing temperature, oxygen density and annealing on the morphology of the nanowires have been simulated. The results show that nanowires with a large head can only be obtained under the correct temperature and a sufficiently high density of oxygen. Under a low temperature or a low density of oxygen, particles can be obtained. And under a high temperature or after annealing, the nanowires will become thicker. The results are consistent with our experiments. This fact indicates that the growth of alpha-Fe(2)O(3) nanowires should be a diffusion process and provides an approach for improving the quality of the nanowires.
Dong
Zhao
Z
Materials Physics Laboratory, State Key Laboratory for Mesoscope Physics, Department of Physics, Peking University, Beijing, 100871, China.
Kashkarov
Pavel
P
Zhang
Han
H
D004058:Diffusion; D005290:Ferric Compounds / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D009010:Monte Carlo Method; D053770:Nanowires / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D013696:Temperature
D005290:Ferric Compounds; C000499:ferric oxide; D007501:Iron; D010100:Oxygen