Attractions between Like-Charged Surfaces with Dumbbell-Shaped Counterions

作者:Kim Yong Woon*; Yi Juyeon; Pincus P A
来源:Physical Review Letters, 2008, 101(20): 208305.
DOI:10.1103/PhysRevLett.101.208305

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.

  • 出版日期2008-11-14