Figure 3 (IMAGE) Institute for Basic Science Caption Figure 3: (a-b) (left panel) SEM images of adlayer-free single crystal graphene films on Cu(111) foils and (right panel) optical images of the films after transfer to 300 nm SiO2/Si wafers. (c-d) (left panel) SEM images of polycrystalline graphene films with adlayers on polycrystalline Cu foils and (right panel) optical images of the films after transfer to 300 nm SiO2/Si wafers. CVD parameters for gas flow and pressure were as follows: (a, c) H2/CH4 (200 sccm /1 sccm) at 2.0 Torr; (b, d) H2/CH4 (30 sccm / 30 sccm 0.1% CH4 in Ar) at 30.0 Torr. The black arrows point to folds. Credit IBS Usage Restrictions Please indicate the credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.