Ohshima Hiroyuki
Faculty of Pharmaceutical Sciences and Institute of Colloid and Interface Science, Science University of Tokyo, 12 Ichigaya Funagawara-machi, Shinjuku-ku, Tokyo 162-0826, Japan.
J Colloid Interface Sci. 2003 Jun 1;262(1):294-7. doi: 10.1016/S0021-9797(03)00190-5.
By extending an approximate theory of the electrophoretic mobility of dilute spherical colloidal particles in a salt-free medium containing only counterions (H. Ohshima, J. Colloid Interface Sci. 248 (2002) 499--503), a systematic numerical method is given for the calculation of the electrophoretic mobility, which is based on an iteration method. We assume that each sphere is surrounded by a spherical free volume, within which counterions are distributed so that electro-neutrality is satisfied. The electrophoretic mobility is found to be determined mainly by the pressure due to the counterions at the outer surface of the free volume. It is shown how the mobility values deviate from those expected from Hückel's formula for high particle charges or zeta potentials because of the counterion condensation effect.
通过扩展关于仅含反离子的无盐介质中稀球形胶体颗粒电泳迁移率的近似理论（H. 大岛，《胶体与界面科学杂志》248 (2002) 499 - 503），给出了一种基于迭代方法计算电泳迁移率的系统数值方法。我们假设每个球体被一个球形自由体积包围，反离子在该自由体积内分布以满足电中性。发现电泳迁移率主要由自由体积外表面处反离子产生的压力决定。结果表明，由于反离子凝聚效应，对于高粒子电荷或zeta电位，迁移率值如何偏离由休克尔公式预期的值。
