Journal article

Viscoelectric Effects in Nanochannel Electrokinetics

Wei-Lun Hsu, Dalton JE Harvie, Malcolm R Davidson, Dave E Dunstan, Junho Hwang, Hirofumi Daiguji

JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2017

Abstract

Electrokinetic transport behavior in nanochannels is different to that in larger-sized channels. Molecular dynamics (MD) simulations in nanochannels have demonstrated two poorly understood phenomena which are not observed in microchannels, being the decreases of (i) average electroosmotic mobility at high surface charge density and (ii) channel conductance at high salt concentrations, as the surface charge is increased. However, current electric double layer (EDL) models do not capture these results. Here we provide evidence that this inconsistency primarily arises from the neglect of viscoelectric (VE) effects in conventional electrokinetic continuum models. We propose a modified continuum ..

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Grants

Awarded by JSPS KAKENHI


Awarded by Grants-in-Aid for Scientific Research


Funding Acknowledgements

The authors acknowledge Rui Qiao of Virginia Tech for providing us with the MD simulation results and some additional information on ref 22. This research was supported by a Grant-in-Aid for Young Scientists (B), JSPS KAKENHI Grant Number 17K17682.