Dielectric modulation of ion transport near interfaces

Abstract

Ion mobility and ionic conductance in nanodevices are known to deviate from bulk behavior, a phenomenon often attributed to surface effects. We demonstrate that dielectric mismatch between the electrolyte and the surface can qualitatively alter ionic transport in a counterintuitive manner. Instead of following the polarization-induced modulation of the concentration profile, mobility is enhanced or reduced by changes in the ionic atmosphere near the interface and affected by a polarization force parallel to the surface. In addition to revealing this mechanism, we explore the effect of salt concentration and electrostatic coupling.

References in corpus (4)

• Salt-induced collapse and reexpansion of highly charged flexible polyelectrolytes
• Universality class of criticality in the restricted primitive model electrolyte
• Ionic transport through sub-10 nm diameter hydrophobic high-aspect ratio nanopores: experiment, theory and simulation
• Ionic exclusion phase transition in neutral and weakly charged cylindrical nanopores

Cited by in corpus (10)

• Accelerated simulation method for charge regulation effects
• Effects of Surface Trapping and Contact Ion Pairing on Ion Transport in Nanopores
• Asymmetric electrolytes near structured dielectric interfaces
• Manipulation of confined polyelectrolyte conformations through dielectric mismatch
• Frequency and field-dependent response of confined electrolytes from Brownian dynamics simulations
• Accurate and Efficient Numerical Simulation of Dielectrically Anisotropic Particles
• HSMA: An O(N) electrostatics package implemented in LAMMPS
• Broken Symmetries in Quasi-2D Charged Systems via Negative Dielectric Confinement
• Ewald summation for ion-dipole mixture under dielectric confinement
• Competition between Born solvation, dielectric exclusion, and Coulomb attraction in spherical nanopores