1. Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education; Department of Chemistry and Center for Nano and Micro Mechanics (CNMM); Tsinghua University; Beijing 100084 P. R. China
2. Center for Nanochemistry (CNC); Beijing Science and Engineering Research Center for Nanocarbons; Beijing National Laboratory for Molecular Sciences; State Key Laboratory for Structural Chemistry of Unstable and Stable Species; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 P. R. China
3. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes; National Laboratory of Mineral Materials; School of Materials Science and Technology; China University of Geosciences (Beijing); Beijing 100083 P. R. China
4. Institute of Applied Physics and Materials Engineering; University of Macau; TaipaMacau P. R. China