CAPILLARY FORCES BETWEEN COLLOIDAL PARTICLES
CAPILLARY FORCES BETWEEN COLLOIDAL PARTICLES
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DOI：
10.1021/la00013a004
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发表时间：
1994-01-01
期刊：
影响因子：
3.9
通讯作者：
NAGAYAMA, K
中科院分区：
文献类型：
--
作者：
KRALCHEVSKY, PA;NAGAYAMA, K
本文研究了一种特殊的毛细相互作用，它不同于一般的悬浮颗粒间的横向毛细作用力。它出现在从液膜突出的颗粒之间，其物理起源是液体沿每个颗粒表面沿着的毛细上升。特别注意的情况下，当接触线的位置是固定的。所得的毛细作用力进行了比较，在固定的接触角。它表明，两种替代的方法来计算毛细管相互作用，力和能量的，是等价的。当液膜较薄时，分离压力影响附着在膜表面的颗粒之间的毛细相互作用。这种效果的外观进行了定量研究，为两个指定的系统建模球状蛋白质在水膜上的汞基板和膜蛋白纳入脂质双层。对于这两个系统的毛细管力似乎是足够强大的，以产生二维粒子聚集和排序。这是一个可能的解释，一些实验观察到的这种影响。
This work is devoted to a special kind of capillary interaction, which differs from the common lateral capillary forces between floating particles. It appears between particles protruding from a liquid film and its physical origin is the capillary rise of the liquid along the surface of each particle. Special attention is paid to the case when the position of the contact line is fixed. The resulting capillary force is compared with that at fixed contact angle. It is demonstrated that the two alternative approaches to the calculation of capillary interactions, the force and the energetical one, are equivalent. When the liquid film is thin, the disjoining pressure affects the capillary interactions between particles attached to the film surfaces. The appearance of this effect is studied quantitatively for two specified systems modeling globular proteins in aqueous film on mercury substrate and membrane proteins incorporated in a lipid bilayer. For both systems the capillary forces appear to be strong enough to engender two-dimensional particle aggregation and ordering. This is a possible explanation of a number of experimental observations of such effects.