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Abstract
The adsorption of Ni on W (110) and (211) single crystal faces is studied in the coverage range up to several monolayers from 300 to 1200 K by Auger electron spectroscopy (AES), low energy electron diffraction (LEED), work function change (Δφ) measurements and thermal desorption spectroscopy (TDS). Strong differences are found in structure, bonding and work function change between the two surfaces. On both surfaces transitions from a pseudomorphic layer to a coincidence lattice are found in the first monolayer which are accompanied by major work function changes of opposite sign on (110) and (211). On the (110) surface no alloying upon annealing occurs in the first monolayer in contrast to the (211) surface.
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