In an attempt to introduce steps in oxide surfaces in a controlled way, different iron oxide phases were grown on an atomically stepped Pt(9 11 11) surface. For low coverages, wetting FeO(111) films are formed which induce step bunching with doubled and tripled terrace widths. Further Fe deposition and oxidation results in formation of islands in a similar Stranski–Krastanov growth mode as on the basal Pt(111) surface. However, restricted diffusion across the step bunches results in a high concentration of comparatively flat elongated islands which form a closed coalesced film at relatively low overall deposition. High pressure oxidation of coalesced films results in poorly defined . The FeO films grown on vicinal Pt substrates may serve as model systems for systematic studies of well-defined defective oxide surfaces, but the catalytically more relevant and phases cannot be obtained reproducibly with a well-defined step structure.
Epitaxial iron oxide growth on a stepped Pt(9 11 11) surface
Present address: Lawrence Berkeley National Laboratories, Materials Sciences Division, Mail Stop 66-214, 1 Cyclotron Road, University of California, Berkeley, CA 94720. Author to whom correspondence should be addressed; electronic mail: email@example.com
Guido Ketteler, Wolfgang Ranke; Epitaxial iron oxide growth on a stepped Pt(9 11 11) surface. J. Vac. Sci. Technol. A 1 July 2005; 23 (4): 1055–1060. https://doi.org/10.1116/1.1889441
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