Abstract
The salt-induced aggregation of polystyrene particles, partially coated with monomeric bovine serum albumin molecules, has been studied. For this purpose, the cluster fractal dimension df and the van Dongen–Ernst homogeneity parameter λ have been measured by means of static and dynamic light scattering techniques. The theoretical analysis indicates that aggregation takes places at an interaction energy minimum predicted by a modified Derjaguin–Landau–Verwey–Overbeeck (DLVO) theory when additional osmotic and elastic terms are considered. It could be shown that the depth of the energy minimum is directly related to df and λ. Moreover, the particle–particle distance within the cluster could also be assessed and compared with the interparticle distance at which the DLVO-predicted minimum appears.
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