Role of surface chemistry in particle deposition

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The mechanism by which a solid surface acquires its charge in an electrolyte solution was found to affect calculated rates of particle deposition almost as dramatically as the charge itself. This is due to the mechanism's effect on changes in surface charge density, which occur as the surface approaches another charged surface. One class of mechanisms, based on the dissociation of acidic and basic surface groups, was considered. The changes in the surface charge density occurring in this case can affect the rate of deposition by several orders of magnitude relative to the rates for approaches at constant charge.