Depletion potentials in colloidal mixtures of hard spheres and rods.
Depletion potentials in colloidal mixtures of hard spheres and rods.
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DOI：
10.1063/1.2820785
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发表时间：
2008-01
期刊：
影响因子：
--
通讯作者：
Weihua Li;Tao Yang;Hong-ru Ma
中科院分区：
文献类型：
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作者：
Weihua Li;Tao Yang;Hong-ru Ma
本文用接受比法计算了刚性球柱悬浮作用下硬球与平面硬壁或两硬球之间的耗尽势。在我们的模拟中，使用接受比方法确定了耗尽势的精确结果和理想气体近似结果。为了比较，耗尽势也研究了使用密度泛函理论和Derjaguin近似。密度分布作为一个功能的位置和方向的杆，在密度泛函理论中使用，计算通过Monte Carlo模拟。在理想气体近似下，用接受比方法得到的势与密度泛函理论得到的势符合得很好。我们的结果与其他理论的结果之间的比较表明，接受比方法是唯一有效的方法来计算的非球形胶体的体积分数超过理想气体近似诱导的耗尽电位。
The depletion potential between a hard sphere and a planar hard wall, or two hard spheres, imposed by suspended rigid spherocylindrical rods is computed by the acceptance ratio method through the application of Monte Carlo simulation. The accurate results and ideal-gas approximation results of the depletion potential are determined with the acceptance ratio method in our simulations. For comparison, the depletion potentials are also studied by using both the density functional theory and Derjaguin approximations. The density profile as a function of positions and orientations of rods, used in the density functional theory, is calculated by Monte Carlo simulation. The potential obtained by the acceptance ratio method is in good agreement with that of density functional theory under the ideal-gas approximation. The comparison between our results and those of other theories suggests that the acceptance ratio method is the only efficient method used to compute the depletion potential induced by nonspherical colloids with the volume fraction beyond the ideal-gas approximation.