Interactions between polyelectrolyte-macroion complexes

被引:26
作者
Boroudjerdi, H [1 ]
Netz, RR [1 ]
机构
[1] LMU, Sekt Phys, D-80333 Munich, Germany
来源
EUROPHYSICS LETTERS | 2003年 / 64卷 / 03期
关键词
D O I
10.1209/epl/i2003-00218-2
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider structures formed by one semi flexible polyelectrolyte ( PE) and one oppositely charged sphere and calculate the interaction between two such complexes within the ground-state approximation, where the PE assumes its optimal configuration. Using parameters appropriate for DNA-histone systems, we find the second virial coefficient of inter-complex interactions to be negative for intermediate salt concentrations within the range where stable complexes are formed, in agreement with experiments. A simple screened monopole-dipole model reproduces these findings.
引用
收藏
页码:413 / 419
页数:7
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