|標題：Diffusiophoresis of a Charge-Regulated Spherical Particle Normal to Two Parallel Disks|
|作品名稱||Diffusiophoresis of a Charge-Regulated Spherical Particle Normal to Two Parallel Disks|
|著者||Hsu, Jyh-Ping; Liu, Kuan-Liang; Hsu, Wei-Lun; Yeh, Li-Hsien; Tseng, Shiojenn|
|出版者||Washington, DC: American Chemical Society|
|著錄名稱、卷期、頁數||Journal of Physical Chemistry B 114(8), pp.2766-2778|
|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.
|關鍵字||Biological cells;Diffusiophoresis;Double layers;Electrolyte concentration;Fixed Charges;Local maximum;Local minimums;Numerical simulation;Osmotic flow;Parallel disks;Particle surface;Spherical particle;Computer simulation;Disks (machine components);Electrophoresis;Functional groups;Surface properties;Disks (structural components)|