title: Physisorption versus chemisorption of oxygen molecules on Ag(100).
abstract: We compare the adsorption of oxygen molecules on Ag(100) at 60 K and at 100 K. At both temperatures, the molecules form islands. Differences between the species adsorbed at the two temperatures in both low-temperature scanning tunneling microscopy and inelastic electron tunneling spectroscopy are attributed to two different adsorption states, a chemisorbed state after 100 K adsorption and a physisorbed state after 60 K adsorption.
authors.affiliation: Institut für Festkörperphysik, Abteilung ATMOS, Leibniz Universität Hannover, Appelstrasse 2, D-30167 Hannover, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Mehlhorn
authors.affiliation: Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
authors.forename: Karina
authors.initials: K
authors.lastname: Morgenstern