CLEAN AND HYDROXYLATED RUTILE TIO2(110) SURFACES STUDIED BY X-RAY PHOTOELECTRON-SPECTROSCOPY

The nature of the chemical bond between the native oxide of Ti metal a nd various adsorbing species is essential to the understanding of the biocompatibility of Ti implants. We report here photoemission measurem ents of the Ti 2p shake-up satellite structure from clean and hydroxyl ated rutile TiO2(110) surfaces which show that the satellite position is a sensitive probe of surface bonding. This effect can be explained in terms of a surface specific relaxation of the photo-induced corehol e. O 1s core levels are also presented and discussed in the framework of the atomic structures of these surfaces.