1. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130012, P.R. China
2. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
3. Department of Chemistry, University of Victoria, Victoria, BC V8P 5C2, Canada
4. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
5. Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai 200072, P.R. China