Structure and geometry of water adsorbed on the MgO(100) surface
نویسندگان
چکیده
Adsorption of DzO on the MgO(100)/Mo(100) surface has been studied using temperature programmed desorption (TPD), reflection absorption infrared spectroscopy (RAIRS) and low energy electron diffraction (LEED). The epitaxially grown MgO(100) films show virtually identical water TPD spectra as the single crystal MgO(100) surface. The first, chemisorbed layer is adsorbed with the plane of the molecule nominally parallel to the surface. A (3 × 2) LEED pattern with missing spots at (0, 1/2) was also observed. Based on the LEED and RAIRS results, a real space structure for the D20 adsorption on the MgO(100) surface is proposed. This structure implies an absolute coverage of 0.67 ML (D20 molecules per Mg cation) for the first, chemisorbed layer.
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