“…Synthesizing large-scale and high quality graphene is a prerequisite for graphene applications in electronics [1,2,3,4,5]. Since the first mechanical exfoliation from highly oriented pyrolytic graphite, various methods to synthesize graphene have been developed, including the chemical reduction of graphene oxides [6,7,8,9,10,11], chemical vapor deposition (CVD) [12,13,14,15,16,17], and epitaxial growth on SiC substrate [18,19].…”