Abstract
Hairy latex particles are observed to deposit on a glass surface under conditions for which the DLVO theory predicts no deposition. From electrophoretic mobility and dynamic light scattering experiments it can be concluded that the surfactant-free polystyrene latex particles used in this study are “hairy”, with the length of the hairs being more than 5nm. It is speculated that the hairs can tunnel through the energy barrier and make contact with the glass since deposition occurs when the length of the hairs is comparable to the minimum distance of approach calculated from DLVO theory. Consistent with this model, it is found that the deposition rates increase with salt concentration, while the detachment rates decrease with salt concentration.
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