https://doi.org/10.1140/epjst/e2016-60152-y
Regular Article
Current fluctuations in nanopores: The effects of electrostatic and hydrodynamic interactions
Rudolf Peierls Centre for Theoretical Physics, Oxford University, Oxford, OX13NP, United Kingdom
a e-mail:ramin.golestanian@physics.ox.ac.uk
b e-mail: douwe.bonthuis@physics.ox.ac.uk
Received: 30 April 2016
Revised: 18 July 2016
Published online: 10 October 2016
Using nonequilibrium Langevin dynamics simulations of an electrolyte with explicit solvent particles, we investigate the effect of hydrodynamic interactions on the power spectrum of ionic nanopore currents. At low frequency, we find a power-law dependence of the power spectral density on the frequency, with an exponent depending on the ion density. Surprisingly, however, the exponent is not affected by the presence of the neutral solvent particles. We conclude that hydrodynamic interactions do not affect the shape of the power spectrum in the frequency range studied.
© The Author(s) 2016
Open Access This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
