1. Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
2. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, People’s Republic of China
3. Electron Microscopy Laboratory, and International Centre for Quantum Materials, School of Physics, Peking University, Beijing 100871, People’s Republic of China
4. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
5. Collaborative Innovation Centre for Quantum Matter, Beijing 100871, China
6. Beijing Graphene Institute (BGI), Beijing 100095, People’s Republic of China