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arXiv · 1103.0544

Attraction Between Like-Charge Surfaces in Polar Mixtures

Sela Samin·Yoav Tsori
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Abstract

We examine the force between two charged surfaces immersed in aqueous mixtures having a coexistence curve. For a homogeneous water-poor phase, as the distance between the surfaces is decreased, a water-rich phase condenses at a distance $D_t$ in the range 1-100nm. At this distance the osmotic pressure can become negative leading to a long-range attraction between the surfaces. The osmotic pressure vanishes at a distance $D_e<D_t$, representing a very deep metastable or globally stable energetic state. We give analytical and numerical results for $D_t$ and $D_e$ on the Poisson-Boltzmann level.

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Sela Samin, Yoav Tsori. 2012-01-17. Attraction Between Like-Charge Surfaces in Polar Mixtures. https://doi.org/10.1209/0295-5075%2F95%2F36002

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