Restructuring of the electrical double layer in ionic liquids upon charging
Ivaništšev, V and Kirchner, K and Kirchner, T and Fedorov, M V (2015) Restructuring of the electrical double layer in ionic liquids upon charging. Journal of Physics: Condensed Matter, 27 (10). 102101. ISSN 0953-8984 (https://doi.org/10.1088/0953-8984/27/10/102101)
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Abstract
We have investigated the electrical double layer (EDL) structure at an interface between ionic liquid (IL) and charged surface using molecular dynamics simulations. We show that for three different models of ILs the EDL restructuring, driven by surface charging, can be rationalized by the use of two parameters - renormalized surface charge (κ) and charge excess in the interfacial layers (λ). Analysis of the relationship between the λ and κ parameters provides new insights into mechanisms of over-screening and charge-driven structural transitions in the EDL in ionic liquids. We show that the restructuring of the EDL upon charging in all three studied systems has two characteristic regimes: (1) transition from the bulk-like (κIon=0) to the multilayer structure (κIon≈0.5) through the formation of an ionic bilayer of counter- and co-ions; and (2) transition from the multilayer (κIon≈0.5) to the crowded (κIon>1) structure through the formation of a monolayer of counter-ions at κIon=1.
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Item type: Article ID code: 53113 Dates: DateEvent13 February 2015Published5 January 2015AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics
Technology and Innovation Centre > BionanotechnologyDepositing user: Pure Administrator Date deposited: 27 May 2015 17:43 Last modified: 04 Oct 2024 00:22 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/53113