Dipolar Poisson-Boltzmann Equation: Ions and Dipoles Close to Charged Surfaces

Details Dipolar Poisson-Boltzmann Equation: Ions and Dipoles Close to Charged Surfaces Dipolar Poisson-Boltzmann Equation: Ions and Dipoles Close to Charged Surfaces

2007-05-09

arxiv.org/abs/0705.1269v1

Phys. Rev. Lett. 99, 077801 (2007)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.99.077801

We present an extension to the Poisson-Boltzmann model where the dipolar features of solvent molecules are taken explicitly into account. The formulation is derived at mean-field level and can be extended to any order in a systematic expansion. It is applied to a two-plate system with oppositely charged surfaces. The ion distribution and profiles in the dipolar order parameter are calculated and can result in a large correction to the inter-plate pressure.

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