Journal Article

FZJ-2020-04065

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Asymmetric double-layer charging in a cylindrical nanopore under closed confinement

Matse, M. (Corresponding author) ; Berg, P. ; Eikerling, M.FZJ*

2020
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/25941  doi:10.1063/1.5139541

Abstract: This article presents a physical–mathematical treatment and numerical simulations of electric double layer charging in a closed, finite, and cylindrical nanopore of circular cross section, embedded in a polymeric host with charged walls and sealed at both ends by metal electrodes under an external voltage bias. Modified Poisson–Nernst–Planck equations were used to account for finite ion sizes, subject to an electroneutrality condition. The time evolution of the formation and relaxation of the double layers was explored. Moreover, equilibrium ion distributions and differential capacitance curves were investigated as functions of the pore surface charge density, electrolyte concentration, ion sizes, and pore size. Asymmetric properties of the differential capacitance curves reveal that the structure of the double layer near each electrode is controlled by the charge concentration along the pore surface and by charge asymmetry in the electrolyte. These results carry implications for accurately simulating cylindrical capacitors and electroactuators.

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Contributing Institute(s):

1. IEK-13 (IEK-13)

Research Program(s):

1. 113 - Methods and Concepts for Material Development (POF3-113) (POF3-113)

Appears in the scientific report 2020

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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