Adsorption and electronic structure of single C60F18 molecule on Si(1 1 1)-7 × 7 surface

Isosurface of charge densities difference (Δρ) between C60F18 adsorbed on a Si(1 1 1)-7 × 7 surface and non-interacting Si(1 1 1)-7 × 7 surface plus the C60F18 molecule with the same atomic positions as in the case of the adsorbed system, shows the surface dipole induced by the molecule. Large Δρ on Si surface are regions where A-type of F atoms interact with the surface, while small Δρ occurs where B-type of F atoms interact with the surface.