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On low index nickel surfaces, repulsive interactions between atomic oxygen and CO drive the phase separation of these species into oxygen-rich and CO-rich islands. Because these adsorbates interact differently with crystallographic steps, the size and the structure of these islands are modified on stepped surfaces. We have monitored coadsorption-induced changes in the distribution of CO with IRRAS,...
Silver-mediated multistep formation on vicinal Si(100)-(2 × 1) is investigated by spot profile-analysing-low-energy electron diffraction and scanning tunnelling microscopy. The employed 4°-miscut of the sample towards [110] leads to a single domain substrate with smooth and equidistant double steps. Surface reconstruction and step structure of the vicinal are altered drastically upon submonolayer...
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