Diffusion of Pd adatoms on faceted Pd/Mo(111) surfaces with hill and valley structure was studied by kinetic Monte Carlo method. The surface consists of {211} channeled facets separated by concave and convex edges. It was shown that diffusion on the faceted surface was significantly reduced with comparison to diffusion on (112) surface by the presence of concave edges. A simple formula for the diffusion coefficient was proposed. The growth of linear structures, studied at low coverage θ = 0.1, depended upon the cross-channel diffusion, although the cross-channel diffusion coefficient was by 6-8 orders of magnitude smaller than the in-channel diffusion coefficient. It was observed that most of atomic structures grew in valleys and the average size of the structure increased with increasing facet size.

Diffusion and Aggregation of Adatoms on Faceted Pd/Mo(111) Surface. D.Ciesielski, C.Oleksy: Surface Science, 2012, 606[19-20], 1481-8