1. State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen University Xiamen 361005 P. R. China
2. Collaborative Innovation Center of Chemistry for Energy MaterialsXiamen University Xiamen 361005 P. R. China
3. Research Institute for Soft Matter and BiomimeticsCollege of Physical Science and TechnologyXiamen University Xiamen 361005 P. R. China
4. Graphene Industry and Engineering Research InstituteXiamen University Xiamen 361005 P. R. China
5. Pen-Tung Sah Institute of Micro-Nano Science and TechnologyXiamen University Xiamen 361005 P. R. China