| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 593160 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2014 | 4 Pages |
A simple approximate analytic expression is derived for the electrophoretic mobility of a soft particle consisting of the hard particle core covered with an ion-penetrable surface layer of polyelectrolytes. The effect of the inhomogeneous distribution of the polymer segments is taken into account by modeling the surface layer as a soft step function with the inhomogeneous distribution width δ. The mobility expression, which is derived on the basis of the non-linear Poisson–Boltzmann equation, improves an approximate mobility expression previously derived by using the linearized Poisson–Boltzmann equation.
Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We model the inhomogeneous distribution of polymer segments by a soft step function. ► We derive an approximate analytic expression for the electrophoretic mobility of a soft particle. ► The mobility of a soft particle decreases by the inhomogeneous segment distribution.
