Influence of Double-layer Polarization and Chemiosmosis on the Diffusiophoresis of a Non-spherical Polyelectrolyte
學年 103
學期 2
出版(發表)日期 2015-05-15
作品名稱 Influence of Double-layer Polarization and Chemiosmosis on the Diffusiophoresis of a Non-spherical Polyelectrolyte
作品名稱(其他語言)
著者 Tseng, Shiojenn; D. H. Lin; J. P. Hsu
單位
出版者
著錄名稱、卷期、頁數 Journal of Colloid and Interface Science 446, pp.272-281
摘要 The diffusiophoresis of a non-spherical polyelectrolyte (PE) is modeled theoretically by considering an ellipsoidal PE of fixed volume and varying aspect ratio, capable of simulating porous entities such as DNAs, proteins, and synthetic polymeric particles. A continuum model comprising coupled Poisson–Nernst–Planck equations and Stokes equations is adopted. Parameters including the physicochemical properties of a PE, the degree of deformation, and the bulk ionic concentration are examined in detail for their influence on the diffusiophoretic behavior of the PE. We show that the effects of double-layer polarization, polarization of the condensed counterions inside a PE, and the chemiosmotic retardation flow inside it yield complicated diffusiophoretic behavior. In particular, the mobility of an elliptic PE can differ both quantitatively and qualitatively from that of a spherical PE. This phenomenon, which has not been reported previously, provides valuable information for both experimental data interpretation and device design.
關鍵字 Diffusiophoresis; Non-spherical polyelectrolyte; Double-layer polarization; Chemiosmosis
語言 en
ISSN
期刊性質 國內
收錄於 SCI
產學合作
通訊作者
審稿制度
國別 TWN
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109561 )