Properties of epitaxial Au on W(100).

For coverages less than 1 monolayer, Au grows epitaxially on W(100), above that coverage it forms randomly oriented Au clusters. The d-band of the Au monolayer indicates that there is appreciable overlap between the 5d wave functions of the adsorbate layer, even though the distance between Au atoms is 10 percent greater than in the metal. The core electron binding energy of the gold monolayer is 1 eV larger than that calculated from adsorption enthalpies for the isolated gold atom, indicating that the cohesive interaction within the monolayer are comparable to those in bulk gold.