Synthesis of large-area monolayer and bilayer graphene using solid coronene by chemical vapor deposition

In this paper, large-area graphene films composed of mono- and bi-layer have been successfully synthesized by atmospheric pressure chemical vapor deposition (CVD) on Cu foils using solid coronene as the carbon precursor. The number of graphene layers was precisely controlled by adjusting the growth temperature range. In addition, the hexagonal lattice of graphene was shown using Raman spectroscopy, transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The continuity and uniformity of graphene films were confirmed by optical microscopy and scanning electron microscopy (SEM). Further, the presence of weak localization was shown by magneto-transport measurements with the carrier mobility of 2120 cm2/Vs at room temperature. This solid-precursor-based atmospheric pressure CVD method provides a simple, inexpensive and safe route for fabrication of graphene films.