科研之友
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摘要
We used streaming potential technique to measure zeta potentials for glass as a function of Co(NH3)(6)Cl-3 concentration, KCl concentration, and pH. Charge inversion was observed only at high surface charge densities and was inhibited by increased KCl concentration. Measured zeta potentials were compared with predictions from a recent theory by dos Santos et al. [J. Chem. Phys. 132, 104105 (2010)] that models multivalent ions adsorbed to the charged surface as a strong coupled liquid (SCL). The location of shear plane was determined independent of the SCL theory, allowing a rigorous experimental test of the theory with no fitting parameters. We found that SCL predictions agree quantitatively with our experimental data.
- 出版日期2013-11-21
