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. 2015 Jul 9;5:12058. doi: 10.1038/srep12058

Figure 1.

Figure 1

(a) Atomic model of graphene supported on Fe/Ni (111) (Ni in dark red, Fe in grey, C in black). Five layers of Ni are included in the model. The supercell includes 4 × 4 of pristine unit cell of graphene and 15 Å of vacuum in the direction perpendicular to the graphene surface; (b,c) are the top and side views of the isosurface of charge redistribution caused by the adsorption of graphene. The isosurface value of 0.008 e/Å3. The accumulation (depletion) of electrons is denoted by yellow (green).