Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 146, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4984101
Keywords
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Funding
- Marie Curie International Research Staff Exchange Scheme Fellowship within the 7th European Community Framework Programme [PIRSES-GA-2013-612562 - POLION]
- Russian Foundation for Basic Research [17-03-01115a]
- Government of Russian Federation [074-U01]
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Polyelectrolyte brushes are formed by charged macromolecules tethered by the end segment to a solid-liquid interface. At low ionic strength of the solution, the intermolecular electrostatic interactions lead to strong stretching of the macromolecules that may, as a result, approach the limit of their extensibility (the contour length). Here, we present an analytical theory of polyelectrolyte brushes developed within the Poisson-Boltzmann approximation which explicitly accounts for finite extensibility of the brush-forming chains. In contrast to earlier theories based on the approximation of Gaussian elasticity of the brush-forming chains, the current approach enables avoiding artificial result of stretching of the chains beyond the contour length at high degrees of ionization or/and large grafting densities. Published by AIP Publishing.
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