Current browse context:
cond-mat.soft
Change to browse by:
References & Citations
Condensed Matter > Soft Condensed Matter
Title: Transport of ions in hydrophobic nanotubes
(Submitted on 2 Nov 2022 (v1), last revised 9 Nov 2022 (this version, v2))
Abstract: The theory of electrokinetic ion transport in cylindrical channels of a fixed surface charge density is revisited. Attention is focused on impact of the hydrophobic slippage and mobility of adsorbed surface charges. We formulate generalised Onsager relations for a cylinder of an arbitrary radius and then derive exact expressions for the mean electro-osmotic mobility and conductivity. To employ these expressions we perform additional electrostatic calculations, with the special focus on the non-linear electrostatic effects. Our theory provides a simple explanation of a giant enhancement of the electrokinetic mobility and conductivity of hydrophobic nanotubes by highlighting the role of appropriate electrostatic and hydrodynamic length scales and their ratios. We also propose a novel interpretation of zeta potentials of cylindrical channels.
Submission history
From: Evgeny Asmolov S [view email][v1] Wed, 2 Nov 2022 07:22:08 GMT (863kb)
[v2] Wed, 9 Nov 2022 09:04:22 GMT (870kb)
Link back to: arXiv, form interface, contact.