https://scholars.lib.ntu.edu.tw/handle/123456789/408531
標題: | Electrophoresis of concentrated spherical particles with a charge-regulated surface | 作者: | Hsu J.-P. Lee E. |
公開日期: | 2000 | 卷: | 112 | 期: | 14 | 起(迄)頁: | 6404-6410 | 來源出版物: | Journal of Chemical Physics | 摘要: | The electrophoretic behavior of spherical colloidal particles is modeled theoretically. The classic analysis is extended to the case of a concentrated dispersion in which the double layer surrounding a particle can assume an arbitrary thickness, and the effect of double-layer polarization is taken into account. Also, the surface of a particle is charge regulated, which leads to a general mixed-type boundary condition, and simulates entities bearing dissociable functional groups such as biological cells and particles with a membrane layer. We show that the absolute surface potential decreases with the increase in £ea, £e and a are, respectively, the reciprocal Debye length and the radius of a particle. The variation of the absolute electrophoretic mobility as a function of £ea is found to have a local maximum. The higher the surface potential the more significant the effect of double-layer polarization, and it becomes insignificant if £ea approaches infinity. ? 2000 American Institute of Physics. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408531 | ISSN: | 00219606 | DOI: | 10.1063/1.481203 |
顯示於: | 化學工程學系 |
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