1. Center for Nanochemistry (CNC); Beijing Science and Engineering Center for Nanocarbons; Beijing National Laboratory for Molecular Sciences (BNLMS); College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
2. CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 P. R. China
3. Academy for Advanced Interdisciplinary Studies; Peking University; Beijing 100871 China
4. Beijing Graphene Institute (BGI); Beijing 100094 China