1. School of Physics and Electronics; Hunan University; Changsha 410082 China
2. Quanzhou Number Fifth High School ChengDong; Quanzhou 362000 P. R. China
3. State Key Laboratory of Coal Conversion; Institute of Coal Chemistry; Chinese Academy of Sciences; Shanxi 030001 China
4. Material Technology Company Limited; Wing Lok Street Sheung Wan Hong Kong 999077 China
5. Fujian Strait Research Institute of Industrial Graphene Technologies; Jinjang 362200 China