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The surface reconstruction of the W(001) surface in the presence of oxygen has been studied by scanning tunneling microscopy. A two-domain (2×{}1) structure with domain size {~}30 {} was observed after the oxygen-covered surface was annealed at >1000 ^∘{}C for 1 min. Tunneling microscopy and spectroscopy results support the missing-row model for the (2×{}1) structure; the preferred location for adsorbed oxygen is either the threefold-hollow site or a site on top of a W atom in the second layer.
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Meyer et al. (1991) studied this question.
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