title: Approximate Analytic Expression for the Electrophoretic Mobility of Moderately Charged Cylindrical Colloidal Particles.
abstract: An approximate analytic expression for the electrophoretic mobility of an infinitely long cylindrical colloidal particle in a symmetrical electrolyte solution in a transverse electric field is obtained. This mobility expression, which is correct to the order of the third power of the zeta potential ζ of the particle, considerably improves Henry's mobility formula correct to the order of the first power of ζ (Proc. R. Soc. London, Ser. A 1931, 133, 106). Comparison with the numerical calculations by Stigter (J. Phys. Chem. 1978, 82, 1417) shows that the obtained mobility formula is an excellent approximation for low-to-moderate zeta potential values at all values of κa (κ = Debye-Hückel parameter and a = cylinder radius).
authors.affiliation: Faculty of Pharmaceutical Sciences, Tokyo University of Science , 2641 Yamazaki Noda, Chiba 278-8510, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ohshima
mesh_terms: D003102:Colloids / Q000737:chemistry*; D004586:Electrophoresis; D008962:Models, Theoretical; D010316:Particle Size; D013499:Surface Properties
chemical_list: D003102:Colloids