A monolayer of buckminsterfullerene (C60) has been modelled on hydrogenated, hydroxylated (-OH-terminated), and oxygenated diamond surfaces using ab-initio, density-functional-theory calculations, with a view to assessing the likelihood of transfer doping in each case. The C60 layer is predicted to spontaneously extract electrons from the hydrogenated surface, although on the hydroxylated surface there is an energy gap of ~1 eV preventing a similar electron transfer. With the fully oxygenated surface, there is a gap to electron transfer of ~4 eV, effectively prohibiting the transfer-doping effect. In each case, the molecule causes only very little disturbance to the substrate, although chemical reaction remains a significant possibility