Dynamic Electrophoretic Mobility of a Spherical Colloidal Particle

✍ Scribed by Hiroyuki Ohshima

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 215 KB
• Volume: 179
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0234

✦ Synopsis

In the present paper, we use directly the method of Oh-A general expression for the dynamic electrophoretic mobility shima et al. (9) without decomposing the electrophoresis of a spherical colloidal particle in an oscillating electric field is problem as in Ref. (8) to solve the electrokinetic equations obtained from the electrokinetic equations derived by Mangelsdorf of Mangelsdorf and White ( 7) and obtain a general expresand White (J. Chem. Soc. Faraday Trans. 88, 3567 (1992)). On sion for the dynamic electrophoretic mobility of a spherical the basis of the obtained general mobility expression, accurate colloidal particle. On the basis of the obtained general mobilsimple analytic formulas suitable for numerical calculation are ity expression we derive an accurate mobility formula which derived for the dynamic electrophoretic mobility and the ratio of is applicable for all ka (k is the Debye-Hu ¨ckel parameter dynamic and static mobilities which are applicable for all ka (k and a is the particle radius) at zero particle permittivity and is the Debye-Hu ¨ckel parameter and a is the particle radius) at zero particle permittivity and low zeta potentials. ᭧ 1996 Academic low zeta potentials.