title: The temperature dependence of Cu2O formation on a Cu(110) surface with an energetic O2 molecular beam.
abstract: We report a study of the surface temperature (T(s)) dependence of Cu(2)O formation on a Cu(110) surface induced by a hyperthermal O(2) molecular beam (HOMB), using x-ray photoemission spectroscopy in conjunction with synchrotron radiation. From the T(s) dependence of the O uptake curves, the direct dissociative adsorption process mainly contributes to the formation of the p(2 × 1)-O structure with an O coverage (Θ) of 0.5 ML for 2.2 eV HOMB incidence. On the other hand, the rate of oxidation at Θ > 0.5 ML, particularly in Cu(2)O formation, strongly depends on the T(s). Thicker Cu(2)O islands were found inhomogeneously at 400 and 500 K, suggesting the dominant role of the migration of Cu atoms in the Cu(2)O formations on the Cu(110) surface.
authors.affiliation: Renovation Center of Instruments for Science Education and Technology, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hashinokuchi
authors.forename: A
authors.initials: A
authors.lastname: Yoshigoe
authors.forename: Y
authors.initials: Y
authors.lastname: Teraoka
authors.forename: M
authors.initials: M
authors.lastname: Okada