Polyampholyte solutions between charged surfaces: Debye–Huckel theory Adsorption of a polyelectrolyte chain to a charged surface Polyampholyte solutions between charged surfaces: Debye–Huckel theory

TitlePolyampholyte solutions between charged surfaces: Debye–Huckel theory Adsorption of a polyelectrolyte chain to a charged surface Polyampholyte solutions between charged surfaces: Debye–Huckel theory
Publication TypeJournal Article
Year of Publication1998
AuthorsAV Dobrynin, M Rubinstein, and J-F Joanny
JournalThe Journal of Chemical Physics the Journal of Chemical Physics the Journal of Chemical Physics the Journal of Chemical Physics Journal of Chemical Physics Colligative Properties the Journal of Chemical Physics the Journal of Chemical Physics
Volume109
Start Page1543
Pagination1543 - 134905
Date Published01/1998
Abstract

We calculate the interaction between two identically charged surfaces immersed in a polyampholyte solution in the framework of the linear response approximation. In the case of the randomly charged polyampholyte with equal fractions of positively f ϩ and negatively f Ϫ charged groups the interaction between charged surfaces is similar to that in electrolyte solutions. The screening of the surface potential in the linear response approximation is due to the charge redistribution on the length scales of the polymer coils without the excess of the polymers. In the solution of asymmetric polyampholytes (f ϩ f Ϫ) the charge density fluctuations result in additional attractive interactions linearly proportional to the charge asymmetry.

DOI10.1063/1.1672157
Short TitleThe Journal of Chemical Physics the Journal of Chemical Physics the Journal of Chemical Physics the Journal of Chemical Physics Journal of Chemical Physics Colligative Properties the Journal of Chemical Physics the Journal of Chemical Physics