Volume exclusion effects in the ground-state dominance approximation for polyelectrolyte adsorption on charged interfaces

P.M. Biesheuvel

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    21 Citations (Scopus)

    Abstract

    We consider the problem of polyelectrolyte molecules adsorbing on oppositely charged interfaces. For sufficiently long chains, the ground-state dominance approximation can be used which results in a (semi-) analytical solution of the self-consistent field equations (aSCF). Whereas existing aSCF theory assumes a low polyelectrolyte density, here the required electrostatic corrections for a high polymer density are implemented. Adsorbed polymer excludes volume for the solvent and small ions, a volume effect that also leads to a reduced dielectric permittivity and a resulting polarization term in the exchange potential. Calculations show the influence of volume exclusion on the polymer density profile.
    Original languageEnglish
    Pages (from-to)353-359
    JournalEuropean Physical Journal E. Soft Matter and Biological Physics
    Volume16
    Issue number4
    DOIs
    Publication statusPublished - 2005

    Keywords

    • weak polyelectrolytes
    • surfaces
    • stability
    • rigidity

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