The electronic structure of Ag(110)c(4x4)C-60 and Au(110)(6x5)C-60

C-60 chemisorbs and forms ordered overlayers on both Ag(110) and Au(110)2 x 1: Ag(110)c(4 x 4)C-60 and Au(110)(6 x 5)C-60. We use direct (UPS) and inverse photoemission spectroscopy (IFS) to examine the occupied and unoccupied electronic structure of Ag(110)c(4 x 4)C-60 and IFS to examine the unoccupied electronic structure of Au(110)(6 x 5)C-60. Comparing the data with multilayer spectra we observe clear and unequivocable signatures of final and initial state effects in the spectra. The final state effects take the form of screening of the ionic final state. Charge transfer from Ag(110) into first layer C-60 molecules is directly observed by UPS and the interaction of first layer C-60 molecules with the substrate is further evidenced by a broadening of C-60 features, ascribed to a splitting of molecular orbitals. The work functions of Ag(110)c(4 x 4)C-60 and Au(110)(6 x 5)C-60 are found to be equal to that of bulk C-60. The combination of the work function measurements and the spectroscopy give new insights into the bonding of C-60 on these surfaces.