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Controllable synthesis of monolayer MoS2 is the basic premise both for exploring some fundamental physical issues,and for engineering its applications in nanoelectronics.Herein,we report the scalable growth of domain size tunable(edge length from~200 nm to 80 μm),monolayer MoS2 flakes or even complete films on commercially available Au foils,via low pressure chemical vapor deposition(LPCVD)method.