Effect of local diffusion coefficient variation on submonolayer growth

In this article Au was deposited on PVF(Polyviny formal) film which was kep t at 253 K to grow Au submonolayer film. It is found that there are special areas whose morphology differs from other's experiment in which metal was deposited on single crystal. In these areas especially big clusters were fo und and they were surrounded by empty bands. Our deduction that this is cau sed by variation of local coefficient is proved by a modified DDA( Depositi on-Diffusion-Aggregation) model which includes edge diffusion. We also argu e that the relationship between cluster diffusion coefficient D-S, and part icles numbers S which the cluster contains should be exponential for Au clu ster on PVF film instead of power-dependent in original DDA model.