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- W1991427367 abstract "The basic properties of Cs adsorption on a Ag(100) single-crystal surface have been investigated using standard surface analysis methods. In TPD the first monolayer of Cs shows a very broad desorption spectrum ranging from 300 to about 900 K. For higher exposures a narrow condensation peak is growing at 300 K. The appearance of this multilayer peak corresponds to a kink in the Cs AES uptake curve, which is interpreted as completion of the first layer. Cesium adsorption at 80 K yields a typical alkali/metal Δφ curve with a minimum of − 2.9 eV at ϑCs = 0.43 ML and saturation at ϑCs⩾ 1 ML, corresponding to the work-function value of bulk Cs. Cs adsorbed at 300 K shows the same initial decrease of Δφ, but at ϑCs ≳ 0.2 ML distinct, temperature-dependent differences are observed indicating a change in the adsorbate structure or a Cs-induced substrate reconstruction. The first monolayer of cesium forms an incommensurate hexagonal superlattice. Its density is slightly compressed (dCs-Cs = 4.89, instead of 5.25 Å for bulk Cs) corresponding to a coverage of θCs = 0.40 with respect to the Ag(100) substrate, calibrated by observed c(4 × 2) and c(22 × 42)R45° LEED structures at ϑCs = 0.62 and 0.31 ML, respectively." @default.
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- W1991427367 date "1993-05-01" @default.
- W1991427367 modified "2023-09-26" @default.
- W1991427367 title "TPD, AES, Δφ and LEED investigations of cesium adsorbed on Ag(100)" @default.
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- W1991427367 doi "https://doi.org/10.1016/0039-6028(93)91028-n" @default.
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