Fig. 4: Adsorption of Ag atom in different sites.
From: Periodic corner holes on the Si(111)-7×7 surface can trap silver atoms
(a) Si(111)-5×5 and (b) Si(111)-7×7 unit cell showing the 12, 8, 6, and 5-membered Si rings on the surface. The optimized structures of Ag adatom (represented by light-blue balls) on (c) 12, (d) 8, (e) 6 and (f) 5-membered Si rings on the Si(111)-5×5 surface. For clarity the top two-layers of Si atoms (in yellow) are shown as ball and stick, and the lower layers of atoms are shown in the CPK form.
