1. University of Science and Technology Beijing; Centre for Modern Physics Technology, Applied Physics Department, Beijing Key Laboratory for Magneto-Photoelectric Composite and Interface Science; 30 Xueyuan Road, Haidian District Beijing 100083 PR China
2. Beijing University of Chemical Technology, College of Chemical Engineering; State Key Laboratory of Organic-Inorganic Composites; No. 15 Beisanhuan East Road, Chaoyang District Beijing 100029 PR China