Charge inversion and layer-by-layer deposition of non-polymeric macroions

We present a model for the adsorption of charged rigid macrolons such as dendrimers on oppositely charged substrates, accounting for small ion penetration into the adsorbed layers. We find that the first layer thickness and adsorbed amount decrease with salinity, but the degree of overcharging is maximized at a finite salt concentration. The thickness of subsequent layers is independent of the number of layers, nearly independent of the substrate charge, and decreases mildly with salinity.