Adsorption of flexible polyelectrolytes on charged surfaces

Adsorption of weakly charged polyelectrolyte (PE) chains from dilute solution on an oppositely charged surface is studied using the self-consistent mean-field approach. The structure of the adsorbed polymer layer and its excess charge are analyzed in the most important asymptotic and intermediate re...

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Bibliographic Details
Published inSoft matter Vol. 12; no. 32; pp. 6771 - 6787
Main Authors Subbotin, A. V, Semenov, A. N
Format Journal Article
LanguageEnglish
Published England 01.01.2016
Subjects
Adsorption
Asymptotic properties
Chains (polymeric)
Charge
Physical properties
Polyelectrolytes
Solvents
Surface chemistry
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Summary:Adsorption of weakly charged polyelectrolyte (PE) chains from dilute solution on an oppositely charged surface is studied using the self-consistent mean-field approach. The structure of the adsorbed polymer layer and its excess charge are analyzed in the most important asymptotic and intermediate regimes both analytically and numerically. Different regimes of surface charge compensation by PE chains including partial and full charge inversion are identified and discussed in terms of physical parameters like the magnitude of specific short-range interactions of PE segments with the surface, solvent quality and ionic strength. The effect of excluded-volume monomer interactions is considered quantitatively both in the marginally good and poor solvent regimes. The effect of various physical parameters on an adsorbed polyelectrolyte layer structure and charge inversion are studied theoretically in detail.
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ISSN:1744-683X
1744-6848
DOI:10.1039/c6sm01140c