Attractions between Like-Charged Surfaces with Dumbbell-Shaped Counterions

被引：55
|
作者：
Kim, Yong Woon [1 ,2 ]
Yi, Juyeon [3 ]
Pincus, P. A. [2 ,4 ]
机构：
[1] Korea Inst Adv Study, Sch Phys, Seoul 130722, South Korea
[2] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA
[3] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea
[4] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 20期
关键词：
D O I：
10.1103/PhysRevLett.101.208305
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the effect of dumbbell-like counterions on the interactions between similarly charged surfaces. Via a systematic study using Monte Carlo simulations and field theory, we fully consider electrostatic correlations and ion structure and find that their intricate coupling determines the equilibrium phase behaviors. In particular, an energetic bridging mechanism is revealed to cause surface attractions for a finite range of surface separations, even in the Poisson-Boltzmann limit.
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页数：4
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