淡江大學機構典藏:Item 987654321/97854
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    题名: Electrophoresis of pH-regulated, zwitterionic particles: Effect of self-induced nonuniform surface charge
    作者: Chen, Yu-Yen;Hsu, Jyh-Ping;Tseng, Shiojenn
    贡献者: 淡江大學數學學系
    关键词: Electrophoresis;pH-regulated nanoparticles;Self-induced nonuniform surface charge;Types of background electrolytes
    日期: 2014-05
    上传时间: 2014-04-23 16:08:29 (UTC+8)
    出版者: Maryland Heights: Academic Press
    摘要: The electrophoresis of a pH-regulated, zwittterionic nanoparticle, taking account of its self-induced nonuniform surface charge, the presence of multiple ionic species, and the effect of double-layer polarization, is modeled. This extends previous models to a case closer to reality because the charged properties of a particle can be influenced by both its physicochemical nature and the solution conditions. We show that the nonuniform surface charge distribution induces a local electric field having the direction either opposite to or the same as that of the applied electric field, thereby either reducing or raising the particle velocity. This effect is most important when both the surface potential and the degree of nonuniformality are high. The competition of the effects of the position dependent double layer thickness, the surface proton distribution, and the double-layer polarization yields complicated and interesting behaviors. Depending upon the level of pH, the influence of the types of background salt on the particle mobility can be significant.
    關聯: Journal of Colloid and Interface Science 421, pp.154-159
    DOI: 10.1016/j.jcis.2014.01.028
    显示于类别:[數學學系暨研究所] 期刊論文

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