Local electroneutrality breakdown for electrolytes within varying-section nanopores
Malgaretti P, Pagonabarraga I, Harting J (2024)
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 47
Article Number: 15
Journal Issue: 2
DOI: 10.1140/epje/s10189-024-00408-9
Abstract
Abstract: We determine the local charge dynamics of a z-z electrolyte embedded in a varying-section channel. By means of an expansion based on the length scale separation between the axial and transverse direction of the channel, we derive closed formulas for the local excess charge for both, dielectric and conducting walls, in 2D (planar geometry) as well as in 3D (cylindrical geometry). Our results show that, even at equilibrium, the local charge electroneutrality is broken whenever the section of the channel is not homogeneous for both dielectric and conducting walls as well as for 2D and 3D channels. Interestingly, even within our expansion, the local excess charge in the fluid can be comparable to the net charge on the walls. We critically discuss the onset of such local electroneutrality breakdown in particular with respect to the correction that it induces on the effective free energy profile experienced by tracer ions. Graphical abstract: (Figure presented.).
Involved external institutions
Forschungszentrum Jülich / Research Centre Jülich (FZJ)
Germany (DE)
Universitat de Barcelona (UB) / University of Barcelona
Spain (ES)
Germany (DE)
Universitat de Barcelona (UB) / University of Barcelona
Spain (ES)
How to cite
APA:
Malgaretti, P., Pagonabarraga, I., & Harting, J. (2024). Local electroneutrality breakdown for electrolytes within varying-section nanopores. European Physical Journal E, 47(2). https://dx.doi.org/10.1140/epje/s10189-024-00408-9
MLA:
Malgaretti, Paolo, Ignacio Pagonabarraga, and Jens Harting. "Local electroneutrality breakdown for electrolytes within varying-section nanopores." European Physical Journal E 47.2 (2024).
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