Experimental demonstration of charge inversion in a protein channel in the presence of monovalent cations
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Other documents of the author: López Peris, María Lidón; Queralt-Martín, María; Alcaraz, Antonio
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comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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INVESTIGACIONMetadata
Title
Experimental demonstration of charge inversion in a protein channel in the presence of monovalent cationsDate
2014-11Publisher
ElsevierISSN
1388-2481Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S1388248114002549Version
info:eu-repo/semantics/submittedVersionSubject
Abstract
Charge inversion takes place when interfacial charges attract counterions in excess of their own nominal charge. To date, this phenomenon has been reported in a variety of membrane channel systems in the presence of ... [+]
Charge inversion takes place when interfacial charges attract counterions in excess of their own nominal charge. To date, this phenomenon has been reported in a variety of membrane channel systems in the presence of multivalent cations. Here, we investigate the charge inversion phenomenon in a protein channel in solutions of monovalent cations. To this end, we perform selectivity experiments in salts of different cations, changing both the electrolyte concentration and the solution acidity. We show that charge inversion can be produced by two different mechanisms, namely specific adsorption and competitive binding. [-]
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Electrochemistry Communications, 2014, vol. 48Rights
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