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 P. R. China
2. Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 P. R. China
3. State Key Laboratory of Precision Spectroscopy School of Physics and Material Science East China Normal University Shanghai 200062 P. R. China
4. IFW Dresden, D-01171 Dresden Germany
5. Soochow Institute for Energy and Materials InnovationS Soochow University Suzhou 215006 P. R. China
6. Department of Chemical and Biomolecular Engineering Hong Kong University of Science and Technology Clear Water Bay Hong Kong, SAR 999077 P. R. China
7. Centre of Polymer and Carbon Materials Polish Academy of Sciences M. Curie-Sklodowskiej 34 Zabrze 41-819 Poland
8. Beijing Graphene Institute Beijing 100095 P. R. China