2014/05/31 by Alpha A. Lee, Alpha A Lee, Dominic Vella +2 · 11 citations
Chemical Engineering · Chemistry · Engineering · Physics and Astronomy · #Coulomb #Dimensionless quantity #Disjoining pressure #Electrohydrodynamics and Fluid Dynamics #Electrostatics and Colloid Interactions #Interaction energy #Ion #Ionic bonding #Ionic liquid #Ionic liquids properties and applications #Phase diagram #cond-mat.soft #cond-mat.stat-mech #physics.chem-ph
paper · pdf · doi:10.1063/1.4893714
published in The Journal of Chemical Physics 141(9), 094904 (American Institute of Physics)
arxiv created 2014/08/01 · openalex publication_date 2014/09/05 · arxiv updated 2014/09/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The confinement of an ionic liquid between charged solid surfaces is treated using an exactly solvable 1D Coulomb gas model. The theory highlights the importance of two dimensionless parameters: the fugacity of the ionic liquid, and the electrostatic interaction energy of ions at closest approach, in determining how the disjoining pressure exerted on the walls depends on the geometrical confinement. Our theory reveals that thermodynamic fluctuations play a vital role in the "squeezing out" of charged layers as the confinement is increased. The model shows good qualitative agreement with previous experimental data, with all parameters independently estimated without fitting.