▎ 摘　　要

NOVELTY - Synthesizing graphene involves: annealing a catalyst substrate in hydrogen gas within a chemical vapor deposition chamber at atmospheric pressure; and exposing the annealed catalyst substrate to a reaction gas mixture containing a hydrocarbon having a partial pressure of 10 mTorr and 10 Torr, and hydrogen having a partial pressure of 0-20 Torr. USE - For making a monolayer or multilayer of graphene (claimed), particularly graphene sheets which are used in large area displays and photovoltaic cells. ADVANTAGE - The movement of the catalyst through the deposition region provides an additional control of the grown graphene property, such as growth of continuous multilayers and monolayers ultimately with a single crystal property by 'survival' of the fastest growing graphene grains. The hydrogen serves a dual role in graphene synthesis, functioning as a co-catalyst and also controlling the grain shape and dimension. The method allows the scalable production of graphene sheets, optionally at atmospheric conditions and also decreases manufacturing costs and production time.