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Electrophoretic mobility of a charged spherical colloidal particle covered with an uncharged polymer layer
Author(s) -
Ohshima Hiroyuki
Publication year - 2002
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/1522-2683(200207)23:13<1995::aid-elps1995>3.0.co;2-m
Subject(s) - electrophoresis , zeta potential , electrolyte , particle (ecology) , polymer , colloid , chemistry , layer (electronics) , electric field , electrophoretic light scattering , chemical physics , radius , chemical engineering , analytical chemistry (journal) , materials science , chromatography , nanotechnology , nanoparticle , dynamic light scattering , physics , organic chemistry , electrode , oceanography , computer security , computer science , engineering , quantum mechanics , geology
A general expression is derived for the electrophoretic mobility of a spherical charged colloidal particle covered with an uncharged polymer layer in an electrolyte solution in an applied electric field for the case where the particle zeta potential is low. It is assumed that electrolyte ions as well as water molecules can penetrate the polymer layer. Approximate analytic expressions for the electrophoretic mobility of particles carrying low zeta potentials are derived for the two extreme cases in which the particle radius is very large or very small.