Fig. 3: Key parameters for growing tBLGs.
From: Hetero-site nucleation for growing twisted bilayer graphene with a wide range of twist angles
a RMLG as functions of the gas-flow rates of H2 and CH4, respectively. The red and blue blocks denote the second-layer-free and second-layer-rich regions, respectively. The horizontal and vertical coordinates are logarithmic, while the color varies linearly with the ratio of second-layer-free domain to all graphene domains. b RBLG as functions of the flow rate ratio of H2 step II/step I. Black, red, and blue curves represent different CH4 flow rate ratio (CH4 step II/step I) of 1.0, 2.5, and 4.0, respectively.
