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    题名: Effect of ionic sizes on critical coagulation concentration : Particles covered by a charge-regulated membrane
    作者: Hsu, Jyh-ping;Huang, Shih-Wei;Kuo, Yung-Chih;曾琇瑱;Tseng, Shio-jenn
    贡献者: 淡江大學數學學系
    日期: 2002-04-25
    上传时间: 2010-01-28 07:19:16 (UTC+8)
    出版者: American Chemical Society (ACS)
    摘要: The critical coagulation concentration (CCC) for the case planar particles covered by a charge-regulated membrane layer immersed in a mixed (a:b) + (c:b) electrolyte solution is evaluated theoretically. The present study extends previous analyses in that a general charged condition in the membrane layer, which mimics biological cells, is considered, and the sizes of the charged species are taken into account. We show that for particles carrying a net negative fixed charge the classic point charge model will overestimate both CCC and the electrical repulsive force between two particles. The electrical repulsive force and the total interaction energy between two particles are large if (1) the pH is high, (2) the membrane is thin, (3) the valence of counterions is low, (4) the fraction of multivalent counterions is low, and (5) the ionic strength is low. CCC is high if (1) the pH is high, (2) the valence of counterions is low, and (3) the size of counterions is large; these results are consistent with experimental observations in the literature.
    關聯: Journal of Physical Chemistry B 106(16), pp.4269-4275
    DOI: 10.1021/jp012282a
    显示于类别:[數學學系暨研究所] 期刊論文

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