Electrophoresis of soft particles: Analytic approximations

Electrophoresis - Tập 27 Số 3 - Trang 526-533 - 2006
Hiroyuki Ohshima1
1Faculty of Pharmaceutical Sciences and Institute of Colloid and Interface Science, Tokyo University of Science, Noda, Chiba, Japan.

Tóm tắt

AbstractAn approximate analytic expression is derived for the electrophoretic mobility of a weakly charged spherical soft particle (i.e., a hard particle covered with a weakly charged polyelectrolyte layer) on the basis of the general mobility expression for soft particles (Ohshima, H., J. Colloid Interface Sci. 2000, 228, 190–193). The obtained mobility expression, which reproduces various approximate results so far derived and gives some new mobility formulas, covers all types of weakly charged soft particles with arbitrary values of the thickness of polymer layer, the radius of the particle core, the electrophoretic softness, and the Debye length, including spherical polyelectrolytes with no particle core as well as spherical hard particles with no polyelectrolyte layer.

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Electrophoresis

Tập 27 Số 3

526-533

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