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The structural aspects of the regimes of stepwise oxidation of Co(1120) by admission of oxygen from 0.1 to 5 L were studied by low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS) and change in work function (Δφ). Six different superstructures are observed if the oxygen dosage is followed by heating to 450 K. With increasing oxygen coverage, the following order is observed:...
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