https://scholars.lib.ntu.edu.tw/handle/123456789/409379
標題: | Electrophoretic mobility of a particle covered with an ion-penetrable membrane | 作者: | Huang S.-W. Hsu J.-P. Tseng S. |
關鍵字: | Biocolloids;Electrophoretic mobility;Ion-penetrable membrane;Ionic size | 公開日期: | 2001 | 卷: | 22 | 期: | 10 | 起(迄)頁: | 1881-1886 | 來源出版物: | Electrophoresis | 摘要: | The electrophoretic behavior of a planar particle covered by an ion-penetrable membrane, which simulates a biological entity, is investigated. We show that, in general, a point charge model will overestimate the electrophoretic mobility of a particle and the deviation increases with the increase in the concentration of fixed charge and with the decrease in the thickness of membrane layer. As in the case of a point charge model, the present model also predicts a local maximum in the absolute mobility as the thickness of membrane layer varies. If the sizes of counterions of various valences are the same, then the lower the valence of counterions, the larger the mobility, and the larger the counterions, the greater the mobility. The latter is consistent with the experimental observations in the literature. For the level of the concentration of fixed charge examined, the effect of coions on the mobility is negligible. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409379 | ISSN: | 01730835 | DOI: | 10.1002/1522-2683(200106)22:10<1881 |
顯示於: | 化學工程學系 |
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