This layer-by-layer deposition by dipping method is principally based on the self-diffusion of adsorbing polymer and the rearrangement on the surface and thus various experimental factors
should be taken into account in order to obtain the uniform surface coverage of a polymer layer adsorbing onto a sub-strate: the adsorption time, the pH, the concentration of polyelectrolyte and the amount of added ionic salt (Cho etal., 2000; Mendelson et al., 2000)