Scaling Theory of Polyelectrolyte Adsorption on Repulsive Charged Surface

TL;DR

This paper develops a scaling theory for polyelectrolyte adsorption on repulsive charged surfaces, identifying different regimes and exploring multi-layer formation at low ionic strength and surface charge density.

Contribution

It introduces a scaling analysis framework to understand polyelectrolyte adsorption regimes and the conditions for multi-layer structures on repulsive surfaces.

Findings

Different adsorption regimes identified in phase diagram

Multi-layer structures can form with like-charged polyelectrolytes

Adsorption behavior depends on ionic strength and surface charge density

Abstract

We studied polyelectrolyte adsorption on a repulsive charged surface by scaling analysis. At low ionic strength and low surface charge density in which a single polyelectrolyte is able to be adsorbed onto the surface, different regimes in the phase diagram are identified. The possibility of multi-layer structure formed by polyelectrolytes of like charge is also investigated.