By using density functional theory, in the local-density approximation and with the generalized gradient approximation, energy barriers were computed for the surface diffusion of Ag on Pt(111), of Ag on a monolayer of Ag on Pt(111), and of Ag on Ag(111). It was found that the diffusion barrier for Ag on Ag(111) increased linearly with increasing lattice constant, with a slope of about 0.7eV. It was suggested that this phenomenon might be exploited in order to alter the diffusion barrier, and thus the island density during growth, by straining the substrate. It was noted that reconstruction occurred when two Ag layers were deposited onto Pt(111).
C.Ratsch, A.P.Seitsonen, M.Scheffler: Physical Review B, 1997, 55, 6750-3