Fig. 1
From: Electronic Properties of Vanadium Atoms Adsorption on Clean and Graphene-Covered Cu(111) Surface
a Adsorption sites on a clean Cu(111) (1 × 1) surface: largest balls indicate surface Cu atoms, and smaller balls indicate sub-layer Cu atoms; b, c adsorption energies of different adsorption sites of V atoms on Cu(111) at 1/9 ML and 1 ML coverages, respectively; d a graphene-covered Cu(111) (1 × 1) surface, red balls indicate C atoms of graphene; e, f adsorption energies of V atoms on graphene-covered Cu(111) at 1/9 ML and 1 ML coverages, respectively