Effect of ionic size on the deposition of charge-regulated particles to a charged surface

doi:10.1021/la0492207

淡江大學機構典藏 > 理學院 > 數學學系暨研究所 > 期刊論文 > Item 987654321/41363

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Title:	Effect of ionic size on the deposition of charge-regulated particles to a charged surface
Authors:	Hsu, Jyh-ping;Chuang, Cheng-Chi;曾琇瑱;Tseng, Shio-jenn
Contributors:	淡江大學數學學系
Date:	2004-12-07
Issue Date:	2010-01-28 07:23:46 (UTC+8)
Publisher:	American Chemical Society (ACS)
Abstract:	The deposition of charge-regulated particles to a rigid, planar charged surface is modeled theoretically, taking the effects of the excluded area arising from deposited particles and finite ionic sizes into account. Here, a particle comprises a rigid core and an ion-penetrable charged membrane layer, which represents a general type of particle. If the membrane layer has a negligible thickness, the particle simulates a regular inorganic particle, and if the membrane layer has a finite thickness, it simulates biocolloids such as cells. The results of numerical simulation reveal that the rate of particle deposition is faster under the following conditions: (1) lower potential of the planar surface, (2) thicker membrane, (3) higher counterion valance, (4) lower fixed charge density, (5) smaller counterions, (6) larger co-ions, (7) larger functional group, and (8) lower pH. Neglecting the sizes of ionic species may lead to an appreciable deviation in both the electrical repulsive force between particle and surface and the rate of deposition. Typical deviation for the former is ∼20%, and that for the latter is ∼ −75%.
Relation:	Langmuir 20(25), pp.11270-11277
DOI:	10.1021/la0492207
Appears in Collections:	[數學學系暨研究所] 期刊論文

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