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Tetraalkylammonium Cations Conduction through a Single Nanofluidic Diode: Experimental and Theoretical Studies

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Tetraalkylammonium Cations Conduction through a Single Nanofluidic Diode: Experimental and Theoretical Studies

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dc.contributor.author Ali, Mubarak es_ES
dc.contributor.author Ramirez Hoyos, Patricio es_ES
dc.contributor.author Nasir, Saima es_ES
dc.contributor.author Cervera Montesinos, Javier es_ES
dc.contributor.author Mafe, Salvador es_ES
dc.contributor.author Ensinger, Wolfgang es_ES
dc.date.accessioned 2017-10-20T07:30:04Z
dc.date.available 2017-10-20T07:30:04Z
dc.date.issued 2017 es_ES
dc.identifier.issn 0013-4686 es_ES
dc.identifier.uri http://hdl.handle.net/10251/89681
dc.description.abstract [EN] We describe experimentally and theoretically the concentration-dependent conduction of tetraalkylammonium (TAA+) cations through a nanofluidic diode fabricated in a polymer membrane via asymmetric track-etching techniques. This single-pore membrane exhibits current rectification characteristics because of the ionized carboxylate groups on the pore surface. We use aqueous solutions of potassium (K+ ), ammonium (A+ ), tetramethylammonium (TMA+ ), tetraethylammonium (TEA+ ), and tetrabutylammonium (TBA+ ) ions with concentrations ranging from 50 to 500 mM under acidic (pH 3.5) and physiological (pH 6.5) conditions. Compared with the K+ and A+ ions, the TMA+ , TEA+ , and TBA+ ions show relatively low rectified ion currents because the cation hydrophobicity increases with the alkyl chain. At low concentrations and acidic conditions, an inversion in the current rectification characteristics is observed, which is attributed to the adsorption of the organic cations on the pore surfaces. The experimental results can be analyzed in terms of the Poisson-Nernst-Planck equations and the geometrical and electrical single pore characteristics for the different ions, pH values, and salt concentrations employed. This theoretical approach is qualitative and could be extended further to include a self-consistent theoretical treatment of the ionic adsorption and surface charge equilibria es_ES
dc.description.sponsorship M. A., S. N., and W. E. acknowledge the funding from the Hessen State Ministry of Higher Education, Research and the Arts, Germany, under the LOEWE project iNAPO. P. R., J. C., and S. M. acknowledge financial support by the Spanish Ministry of Economic Affairs and Competitiveness (MAT2015-65011-P) and FEDER. The authors are also thankful to Prof. C. Trautmann, Department of Materials Research from GSI, for support with irradiation experiments. en_EN
dc.language Inglés es_ES
dc.relation MINECO/MAT2015-65011-P
dc.relation.ispartof ELECTROCHIMICA ACTA es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Tetraalkyammonium cations es_ES
dc.subject Biomimetic nanopore es_ES
dc.subject Current rectification es_ES
dc.subject Nanofluidic diode es_ES
dc.subject Nernst-Planck equation es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title Tetraalkylammonium Cations Conduction through a Single Nanofluidic Diode: Experimental and Theoretical Studies es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.electacta.2017.08.078 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.description.bibliographicCitation Ali, M.; Ramirez Hoyos, P.; Nasir, S.; Cervera Montesinos, J.; Mafe, S.; Ensinger, W. (2017). Tetraalkylammonium Cations Conduction through a Single Nanofluidic Diode: Experimental and Theoretical Studies. ELECTROCHIMICA ACTA. 250:302-308. doi:10.1016/j.electacta.2017.08.078 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.electacta.2017.08.078 es_ES
dc.description.upvformatpinicio 302 es_ES
dc.description.upvformatpfin 308 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 250 es_ES
dc.relation.pasarela 342403 es_ES
dc.contributor.funder Hessen State Ministry of Higher Education, Research and the Arts, Germany
dc.contributor.funder Ministerio de Economía, Industria y Competitividad (MINECO9


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