  We have characterised the submonolayer assembly of C60F48 molecular surface
acceptors on the hydrogen terminated (100) diamond surface using scanning
tunneling microscopy and X-ray photoelectron spectroscopy, and explored the
influence this assembly has on the energy level alignment which governs surface
transfer doping. Following deposition, disordered multilayered islands are
observed. Annealing to 90$^{\circ} \rm{C}$ causes a transition from dewetting
multi-layered islands to a single wetting layer at sufficiently high coverage,
accompanied by a change in the energy alignment between the C60F48 and the
diamond surface which consequently decreased the carrier density induced by
transfer doping by 20%.
