Surface-induced layer formation in polyelectrolytes

TL;DR

This paper uses RPA calculations to explore how oppositely charged polyelectrolytes can form layered structures near charged surfaces, even when the bulk mixture remains homogeneous, depending on surface charge strength.

Contribution

It provides a theoretical analysis of surface-induced layer formation in polyelectrolyte mixtures, highlighting conditions for stable layer creation near charged interfaces.

Findings

Layered structures form near charged surfaces under strong surface charge.

Layer formation occurs even when the bulk mixture is homogeneous.

Multiple stable layers can develop depending on surface charge strength.

Abstract

We analyze, by means of an RPA calculation, the conditions under which a mixture of oppositely charged polyelectrolytes can micro-segregate in the neighborhood of a charged surface creating a layered structure. A number of stable layers can be formed if the surface is sufficiently strongly charged even at temperatures at which the bulk of the mixture is homogeneous.