Fig. 1.
(A and B) SEM images in which dark and bright parts represent the graphene platelets and the Cu surface, respectively. Changing the synthesis temperature and CH4 flow rates (A) shows an average plate size of approximately 50 μm in diameter, approaching a more perfect packing. [Reproduced from Geng, et al. (1)]. (B) Nearly perfect 2D lattice of graphene platelets obtained by Geng et al. (1). [Reproduced from Geng, et al. (1)]. (C) Molecular model of a hexagonal graphene platelet and (D) molecular model of an ordered array of hexagonal graphene platelets (courtesy of F. López-Urías).