Surprising arching sheet-like dendrites growing from BaF<sub>2</sub> nanocubes
Hongzhou Lian; Zeren Ye; Chunshan Shi; Hongzhou Lian; Key Laboratory of RareEarth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China; Zeren Ye; Key Laboratory of RareEarth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China; Chunshan Shi; Key Laboratory of RareEarth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
Журнал:
Nanotechnology
Дата:
2004-11-01
Аннотация:
BaF<sub>2</sub> nanocubes were prepared from quaternary reverse micelles of cetyl trimethyl ammonium bromide (CTAB), n-butanol, n-octane, and water. Interestingly, there are arching sheet-like dendrites growing between two neighbouring sides of these cubes. X-ray powder diffraction (XRD) analysis showed that the products were BaF<sub>2</sub> single phase. Scanning electron microscopy (SEM) or transition electron microscopy (TEM) was used to estimate the size of the final products. The results showed that the shape and size of particles were strongly dependent on the reaction conditions, such as the temperature and reaction time. When the reaction temperature was 25 °C, we obtained cuboid-like particles with ‘clean’ surfaces (no dendrites growing on them), and when the temperature was 35 °C, we obtained nanocubes with dendrites growing from them between the neighbouring sides. The influence of reaction time at a temperature of 35 °C is also discussed.
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