Influence of surface affinity of planar walls on effective interaction between the wall and colloids
Influence of surface affinity of planar walls on effective interaction between the wall and colloids
复制标题
平面壁表面亲和力对壁与胶体有效相互作用的影响
DOI：
10.1016/j.physa.2008.12.032
复制
发表时间：
2009-04
影响因子：
3.3
通讯作者：
中科院分区：
文献类型：
--
作者：
利用密度泛函理论，研究了小胶体海洋中的大胶体与对小胶体具有不同亲和力的壁面之间的有效相互作用。引入了斯蒂尔10-4-3势来模拟壁面与小胶体之间的短程排斥和远程吸引相互作用。研究发现，壁面的表面亲和力对有效相互作用有显著影响。在近距离斥力情况下，斥力大大增强了大胶体与壁面的有效引力，而大胶体与壁面的有效引力敏感地取决于小胶体的浓度，对斥力不敏感。在远距离吸引情况下，小胶体的浓度和吸引强度对有效相互作用都有很大的影响，并且随着吸引强度的增加，当大胶体靠近壁面时可能会产生强烈的斥力。在小胶体的低密度极限下，本文的结果与Asakura和Oosawa（AO）近似的结果一致。
Using density functional theory, we investigate the effective interaction between a big colloid immersed in a sea of small colloids and a wall which has different affinity to the small colloids. Steele 10-4-3 potential is introduced to mimic both short-range repulsive and long-range attractive interactions between the wall and the small colloids. It is found that the surface affinity of the wall has a significant influence on the effective interaction. In the short-range repulsive case, the repulsion greatly enhances the big colloid-wall effective attraction, which sensitively depends on the concentration of small colloids, and is not sensitive to the repulsive strength. In the long-range attractive case, both the concentration of small colloids and the attractive strength have great effect on the effective interaction, and with an increase of the attractive strength, a strong repulsion may be induced when the big colloid is close to the wall. In low density limit of small colloids, the present results agree well with those of the Asakura and Oosawa(AO) approximation.
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DOI：
10.1103/physreve.62.6926
发表时间：
2000-03
期刊：
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子：
--
作者：
Roth;Dietrich
通讯作者：
Roth;Dietrich
影响因子：
9.9
作者：
Sharma;Tan;Walz
通讯作者：
Sharma;Tan;Walz
影响因子：
4.4
作者：
Weihua Li;Hong-ru Ma
通讯作者：
Weihua Li;Hong-ru Ma
影响因子：
4.4
作者：
Kulkarni, AM;Chatterjee, AP;Zukoski, CF
通讯作者：
Zukoski, CF
影响因子：
8.6
作者：
Crocker, JC;Matteo, JA;Yodh, AG
通讯作者：
Yodh, AG