Adsorption of oxygen on a Cu{110} surface with and without the influence of A keV Ne+ beam Stage I: Coverages up to half a monolayer

Abstract

Low Energy Ion Scattering has been used to study the interaction of molecular oxygen with a Cu{110} surface. The amount of adsorbed atomic oxygen was monitored by the 4 keV Ne+¦O reflection signal. In the first adsorption stage (coverage less than half a monolayer) the sticking probability varied proportional to the number of empty adsorption sites: S = S0 (1 − gq). It turned out not to be influenced by the Ne+ bombardment. The initial sticking probability S0 was found to be ≈ 0.24. In this first adsorption stage the oxygen-covered surface is reconstructed according to the “missing row” model, leading to a (2 × 1) LEED pattern.