Towards wafer-size strictly monolayer graphene on copper via cyclic atmospheric chemical vapor deposition

Here we employ cyclic atmospheric chemical vapor deposition method to readily achieve strictly monolayer graphene continuous sheet with size as large as several square centimeters on copper foil. The uniformity and quality of as-synthesized graphene sheet have been verified by optical microscope, Raman, and electronic measurement, etc. The mechanism of this method is also revealed by carbon isotope growth and following Raman mapping analysis. This simple but effective strategy is promising to be extended into mass production in future.

We for the first time employed cyclic atmospheric chemical vapor deposition method to synthesize strictly monolayer graphene continuous sheet on commercial copper foil by selectively removal of few layer structures (FLS). The growth mechanism is verified by methane isotopes growth and large scale Raman mapping analysis. The size of strictly monolayer graphene sheet as large as 2 cm × 2 cm can be readily achieved. Principally; it is promising to extend this simple but effective method to mass production in future.202