Pt Thin Films with Nanometer-Sized Terraces of (100) Orientation
作者： Nicolas Sacré , Gregor Hufnagel , Jules Galipaud , Erwan Bertin , Syed Ali Hassan
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摘要: Pulsed laser deposition was used to grow thin layers of Pt on (001)-oriented MgO substrate. The temperature varied from −25 600 °C, and the film thickness ca. 7 45 nm. crystalline quality, orientation, epitaxial relationship films substrate were investigated by atomic force microscopy X-ray diffraction as well through electrochemical probe reactions that are sensitive surface crystallographic orientations (H adsorption/desorption) width (100) terrace (NH3 electro-oxidation reaction). All (7 nm thick) exhibit only one peak (the (001) peak) a 4-fold in-plane symmetry, indicating growth is achieved independently temperature. Moreover, pole figure indicates all Pt(001)[010]//[010](001)MgO cube-on-cube relationship, which consistent with AFM images. prepared nearly 60% sites, and...
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