VIBRATIONAL AND STRUCTURAL STUDIES OF OXYGEN-ADSORPTION ON THE AG(110) SURFACE

Adsorption of oxygen on the Ag(110)1x1 surface is studied by field ion -scanning tunneling microscopy (FI-STM) and high resolution electron e nergy loss spectroscopy (HREELS). Linear chain (added-row) formation i n the [001] direction upon oxygen adsorption is observed. The step mov ement and step bunching are observed at the exposure lower than 60 L. Another type of chain formation are observed between the added rows wi th the local 3X1 configuration. The coverage and time-dependent HREELS data shows rather complicated dynamics in the case of room temperatur e adsorption. The HREELS data with the resolution of 4 meV (FWHM) show s an extra broad, weak peak at 15 meV, which has a maximum peak value at the exposure near 1800 L corresponding to the completion of the 3X1 phase.