Synthesis of large-scale undoped and nitrogen-doped amorphous graphene on MgO substrate by chemical vapor deposition

Jin Zhao, Guoyin Zhu, Wen Huang, Zhi He, Xiaomiao Feng, Yanwen Ma, Xiaochen Dong, Quli Fan, Lianhui Wang, Zheng Hu, Yinong Lü, Wei Huang