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    题名: Electrophoresis of a pH-Regulated Zwitterionic Nanoparticle in a pH-Regulated Zwitterionic Capillary
    作者: Wang, Nan;Yee, Chien-Pai;Chen, Yu-Yen;Hsu, Jyh-Ping;Tseng, Shiojenn
    贡献者: 淡江大學數學學系
    日期: 2013
    上传时间: 2014-02-17 11:06:33 (UTC+8)
    出版者: Washington: American Chemical Society
    摘要: We consider the electrophoresis of a rigid sphere along the axis of a narrow cylindrical capillary; both are pH-regulated and zwitterionic. This extends available analyses in the literature to a more general and realistic case. Adopting a titanium oxide (TiO2) particle in a silicon dioxide (SiO2) capillary as an example, we examine the capillary radius, the solution pH, and the electrolyte concentration (or double-layer thickness) for their influences on the electrophoretic behavior of a particle. Because the pH solution is adjusted by HCl and NaOH, the presence of four kinds of ionic species, namely, H+, OH–, Na+, and Cl–, should be considered if NaCl is the background electrolyte. This also extends conventional electrophoresis analyses to the case of multiple ionic species. The interactions of the electroosmotic flow, the properties of the particle and the solution, and the capillary wall yield complicated electrophoretic behavior that can be regulated by the solution pH and the background electrolyte concentration. The results gathered are necessary for the future design of nanopore-based electrophoresis devices.
    關聯: Langmuir 29(23), pp.7162–7169
    DOI: 10.1021/la400946s
    显示于类别:[數學學系暨研究所] 期刊論文


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