https://scholars.lib.ntu.edu.tw/handle/123456789/409326
標題: | Diffusiophoresis of a charge-regulated spherical particle normal to two parallel disks | 作者: | Hsu J.-P. Liu K.-L. Hsu W.-L. Yeh L.-H. Tseng S. |
公開日期: | 2010 | 卷: | 114 | 期: | 8 | 起(迄)頁: | 2766-2778 | 來源出版物: | Journal of Physical Chemistry B | 摘要: | The diffusiophoresis of a charge-regulated spherical particle normal to two parallel disks as a response to an applied uniform electrolyte concentration gradient is modeled theoretically. The fixed charge on the particle surface comes from the dissociation/association reactions of the functional groups, yielding a charge-regulated surface, which simulates biological cells. Numerical simulations are conducted to examine the behavior of a particle under various conditions: the parameters considered in the simulation include the thickness of the double layer, the charged conditions on the particle surface, the relative size of the particle, and the particle-disk distance. Because the diffusiophoretic mobility of a particle can be dominated by chemiphoresis, electrophoresis, or osmotic flow, the diffusiophoretic behavior of the particle is complicated. For instance, the diffusiophoretic mobility may have two local maximums and a local minimum as the thickness of the double layer varies. This behavior is of practical significance if diffusiophoresis is adopted as a separation operation or as a tool to characterize the surface properties of a particle. ? 2010 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409326 | ISSN: | 15206106 | DOI: | 10.1021/jp907696t |
顯示於: | 化學工程學系 |
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