https://scholars.lib.ntu.edu.tw/handle/123456789/409277
標題: | Diffusiophoresis of polyelectrolytes in nanodevices: Importance of boundary | 作者: | Hsu J.-P. Liu K.-L. Tseng S. |
公開日期: | 2013 | 卷: | 117 | 期: | 18 | 起(迄)頁: | 9469-9476 | 來源出版物: | Journal of Physical Chemistry C | 摘要: | Considering the potential applications of diffusiophoresis conducted in nanodevices, a thorough theoretical analysis is performed for the first time on the diffusiophoresis of a polyelectrolyte (PE) in the presence of two representative types of boundaries: the direction of diffusiophoresis is either normal (type I) or parallel (type II) to a boundary, using two large parallel disks and a cylindrical pore as an example, respectively. It is interesting to observe that due to the effects of double-layer polarization, counterion condensation, polarization of condensed counterions, and diffusion of co-ions across a PE, its diffusiophoretic behavior can be influenced both quantitatively (magnitude of mobility) and qualitatively (direction of diffusiophoresis) by a boundary. In general, type I (II) boundary raises the diffusiophoretic mobility of a PE toward the high (low) salt concentration side. The results gathered provide necessary information for applications in, for example, designing catalytic swimmers and nanopore-based biosensor devices. ? 2013 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409277 | ISSN: | 19327447 | DOI: | 10.1021/jp312702r |
顯示於: | 化學工程學系 |
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