1. Center for Nanochemistry (CNC); Academy for Advanced Interdisciplinary Studies; Beijing National Laboratory for Molecular Sciences; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
2. Key Laboratory for the Physics and Chemistry of Nanodevices; Department of Electronics; Peking University; Beijing 100871 China
3. Electron Microscopy Laboratory; School of Physics; Center for Nanochemistry (CNC); Peking University; Beijing 100871 China
4. Institute of Functional Nano and Soft Materials (FUNSOM); Soochow University; Suzhou Jiangsu 215006 P. R. China
5. Soochow Institute for Energy and Materials Innovations (SIEMIS); Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province; Soochow University; Suzhou Jiangsu 215006 P. R. China
6. Soochow Institute For Energy and Materials Innovations (SIEMIS); School of Energy; College of Physics; Optoelectronic and Energy; Soochow University; Suzhou Jiangsu 215006 P. R. China
7. Beijing Graphene Institute (BGI); Beijing 100095 China
8. Department of Materials Science and Engineering; College of Engineering; Peking University; Beijing 100871 P. R. China