1. Guangdong Engineering & Technology Research Centre of Graphene‐Like Materials and Products Department of Chemistry College of Chemistry and Materials Science Jinan University Guangzhou 510632 China
2. Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan University Guangzhou 510632 China
3. School of Physics Xidian University Xi'an 710071 China