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Interionic Interactions in Conducting Nanoconfinement
Author(s) -
Rochester Christopher C.,
Lee Alpha A.,
Pruessner Gunnar,
Kornyshev Alexei A.
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201300834
Subject(s) - coulomb , nanopore , chemical physics , materials science , dielectric , nanoporous , electric field , graphene , electron , ionic bonding , nanotechnology , condensed matter physics , electrode , penetration (warfare) , ion , chemistry , optoelectronics , physics , quantum mechanics , organic chemistry , operations research , engineering
Interionic interactions in conducting nanopores determine how counterions may be packed in the pores subject to the applied voltage. In ideal metals, interactions are exponentially screened by metallic electrons. However, modern nanoporous electrodes are predominantly made of carbon materials. To what extent is this screening affected by a different mode of dielectric response in such materials? To answer this question we study Coulomb interaction of charges in cylindrical and slit pores that allow finite electric field penetration into the pore walls, as well as the Coulomb interaction in a nanogap between two thin walls of graphene modeled by a non‐local dielectric function. In all cases studied the screening was found to be subtly different than in metallic nanopores, but still strong enough to support realization of the so called superionic state in such pores.