Effective interactions between star polymers and colloidal particles

被引:86
作者
Jusufi, A [1 ]
Dzubiella, J [1 ]
Likos, CN [1 ]
von Ferber, C [1 ]
Löwen, H [1 ]
机构
[1] Univ Dusseldorf, Inst Theoret Phys 2, D-40225 Dusseldorf, Germany
关键词
D O I
10.1088/0953-8984/13/28/303
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Using monomer-resolved molecular dynamics simulations and theoretical arguments based on the radial dependence of the osmotic pressure in the interior of a star, we systematically investigate the effective interactions between hard, colloidal particles and star polymers in a good solvent. The relevant parameters are the size ratio q between the stars and the colloids, as well as the number of polymeric arms f (functionality) attached to the common centre of the star. By covering a wide range of q's ranging from zero (star against a flat wall) up to about 0.75, we establish analytical forms for the star-colloid interaction which are in excellent agreement with simulation results. A modified expression for the star-star interaction for low functionalities, f less than or similar to 10 is also introduced.
引用
收藏
页码:6177 / 6194
页数:18
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