Non-linear elasticity effects and stratification in brushes of branched polyelectrolytes

Inna O. Lebedeva, Oleg V. Shavykin, Igor M. Neelov, Ekaterina B. Zhulina, Frans A.M. Leermakers, Oleg V. Borisov*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Brushes formed by arm-tethered starlike polyelectrolytes may exhibit internal segregation into weakly and strongly extended populations (stratified two-layer structure) when strong ionic intermolecular repulsions induce stretching of the tethers up to the limit of their extensibility. We propose an approximate Poisson-Boltzmann theory for analysis of the structure of the stratified brush and compare it with results of numerical self-consistent field modeling. Both analytical and numerical models point to the formation of a narrow cloud of counterions (internal double electrical layer) localized inside a stratified brush at the boundary between the layers.

Original languageEnglish
Article number214902
JournalJournal of Chemical Physics
Volume151
Issue number21
DOIs
Publication statusPublished - 7 Dec 2019

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