https://scholars.lib.ntu.edu.tw/handle/123456789/61345
標題: | Electrophoresis of a charge-regulated spheroid along the axis of an uncharged cylindrical pore | 作者: | Hsu, Jyh-Ping Hung, Shih-Hsing |
關鍵字: | Electrophoresis;Boundary effect;Spheroid in cylinder;Charge-regulation model | 公開日期: | 2003 | 出版社: | Taipei:National Taiwan University Dept Chem Engn | 起(迄)頁: | - | 來源出版物: | Journal of Colloid & Interface Science | 摘要: | Boundary effects can have a profound influence on the electrophoretic behavior of a charged entity, in particular, when the entity is nonspherical and its surface conditions are dependent upon the nearby environment. In this study, the electrophoresis of a spheroid along the axis of an uncharged cylindrical pore is analyzed for the case where the electrical potential is low and the applied electric field is weak. We consider the case where the surface of a particle contains dissociable acidic and basic functional groups, which simulate biological colloids and entities covered by an artificial membrane. This leads to a mixed-type boundary value problem, which extends the conventional constantsurface- potential and constant-surface-charge-density models to a more general case. The effects of the particle aspect ratio, the relative magnitudes of particle and pore, the thickness of the double layer surrounding a particle, and the pH of the liquid phase on the electrophoretic mobility of a particle are investigated. Several interesting results are observed; for example, if the volume of a particle is fixed, its mobility may have a local maximum as the relative magnitudes of its two axes vary. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501275355 | 其他識別: | 246246/2006111501275355 | DOI: | 10.1016/S0021-9797(03)00331-X |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。