TY  - JOUR
AU  - Matse, Mpumelelo
AU  - Berg, Peter
AU  - Eikerling, Michael
TI  - Asymmetric double-layer charging in a cylindrical nanopore under closed confinement
JO  - The journal of chemical physics
VL  - 152
IS  - 8
SN  - 1089-7690
CY  - Melville, NY
PB  - American Institute of Physics
M1  - FZJ-2020-04065
SP  - 084103 -
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:32113335
UR  - <Go to ISI:>//WOS:000519832600003
DO  - DOI:10.1063/1.5139541
UR  - https://juser.fz-juelich.de/record/885753
ER  -