Due to their long range, charge effects can be quite important in nanoparticle and colloidal systems. Surface charge on the particle is typically discussed in terms of zeta potential; the potential at the shear plane. Determining the effect of suspension properties, such as dissolved acids, bases, or other ions, on zeta potential allows deliberate design of suspensions and is a critical tool to manipulating nanoparticle behavior. In other words, suspension stability can be effectively manipulated for our benefit.
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