Abstract
The surface structures of oxygen adsorbed on Mo(110) was studied by low energy electron diffraction (LEED) and scanning tunneling microscopy (STM).At lower exposure of oxygen three phases of the surface structure were found at room temperature. They were 41ML-(2x2), 21ML-(1x2) or (2x1),and 43ML-(2x2) structures. Some complex structures appeared at high exposures. Sharper LEED patterns and uniform surface structures might be obstained after post-annealing to 400K and 500K.While exposing 400K or 500K Mo(110) to oxygen, we could obtain not only sharper LEED patterns but also complex LEED patterns and surface structures at high exposures. The research has another goal. Owing to the fact that W and Mo are metals of bcc structure, comparison of oxygen adsorption on Mo(110) with W(110) was carried out in the study.
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