1. Laboratory of Material Surface Engineering and Nanofabrication Xi'an Modern Chemistry Research Institute Xi'an Shaanxi 710065 P. R. China
2. Science and Technology on Combustion and Explosion Laboratory Xi'an Modern Chemistry Research Institute Xi'an Shaanxi 710065 P. R. China
3. State Key Laboratory of Fluorine and Nitrogen Chemicals Xi'an Modern Chemistry Research Institute Xi'an Shaanxi 710065 P. R. China