Curvature effects in interfacial acidity of amphiphilic vesicles

Curvature effects in interfacial acidity of amphiphilic vesicles

We analyze the changes in the vicinal acidity (pH) at a spherical amphiphilic membrane. The membrane is assumed to contain solvent accessible, embedded, dissociable, charge regulated moieties. Basing our approach on the linear Debye-H\"uckel as well as the non-linear Poisson-Boltzmann theory, t...

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Veröffentlicht in:arXiv.org 2023-05
Hauptverfasser: Petch Khunpetch, Majee, Arghya, Hu Ruixuan, Podgornik, Rudolf
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Adsorption
Curvature
Membranes
Physics - Biological Physics
Physics - Chemical Physics
Physics - Soft Condensed Matter
Physics - Statistical Mechanics
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Majee, Arghya
Hu Ruixuan
Podgornik, Rudolf
description We analyze the changes in the vicinal acidity (pH) at a spherical amphiphilic membrane. The membrane is assumed to contain solvent accessible, embedded, dissociable, charge regulated moieties. Basing our approach on the linear Debye-H\"uckel as well as the non-linear Poisson-Boltzmann theory, together with the general Frumkin-Fowler-Guggenheim adsorption isotherm model of the charge regulation process, we analyse and review the dependence of the local pH on the position, as well as bulk electrolyte concentration, bulk pH and curvature of the amphiphilic single membrane vesicle. With appropriately chosen adsorption parameters of the charge regulation model, we find a good agreement with available experimental data.
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subjects Adsorption
Curvature
Membranes
Physics - Biological Physics
Physics - Chemical Physics
Physics - Soft Condensed Matter
Physics - Statistical Mechanics
title Curvature effects in interfacial acidity of amphiphilic vesicles
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