(2 × 1)-Na surface reconstruction induced by NaCl dissociation on Ag(1 1 0) during LEED analysis |
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Authors: | K Aït-Mansour M Bielmann O Gröning P Ruffieux R Fasel P Gröning |
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Institution: | Swiss Federal Laboratories for Materials Testing and Research (EMPA), Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland |
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Abstract: | This study first reports the initial growth stages of sodium chloride (NaCl) on Ag(1 1 0) at room temperature. NaCl grows in bi-layer mode along its 1 0 0] axis and gives rise to (4 × 1) and (1 × 2) reconstructed domains for coverages lower than two monolayers (ML), a minimal thickness inducing a bi-dimensional closed film. In addition, a 10 ML NaCl film has been examined by low energy electron diffraction (LEED). LEED analysis leads to the dissociation of the NaCl deposit in a few minutes. The NaCl dissociation implies Cl desorption from the surface and Na remaining on it. The residual Na is arranged in the form of a (2 × 1) surface reconstruction and is found to be strongly bounded to the Ag substrate. These findings have been established by using the X-ray photoelectron spectroscopy technique. |
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Keywords: | Sodium chloride (NaCl) NaCl dissociation Ag(1 1 0) Low energy electron diffraction and bombardment X-ray photoelectron spectroscopy Surface reconstructions |
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