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Related Experiment Video

Updated: May 25, 2026

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Published on: April 16, 2018

Deionization shocks in microstructures.

Ali Mani¹, Martin Z Bazant

¹Department of Mechanical Engineering, Stanford University, Stanford, California 94305, USA. alimani@stanford.edu

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|February 7, 2012

Summary

This summary is machine-generated.

A novel "deionization shock" phenomenon is predicted in microstructures, where selective ion removal creates an ultrapure solution. This shock

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Last Updated: May 25, 2026

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

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AC Electrokinetic Phenomena Generated by Microelectrode Structures

AC Electrokinetic Phenomena Generated by Microelectrode Structures

Published on: July 28, 2008

Area of Science:

Physical Chemistry
Electrokinetics
Microfluidics

Background:

Salt transport in bulk electrolytes is governed by diffusion and advection.
In charged microstructures, surface conduction and electro-osmotic flow also influence ionic transport, leading to linear electrokinetic phenomena at low voltages.

Purpose of the Study:

To predict and explain nonlinear dynamics arising from competing bulk and interfacial transport at higher voltages in microstructures.
To elucidate the physics, existence, structure, and stability of a predicted "deionization shock" phenomenon.

Main Methods:

Mathematical theory development for deionization shocks, considering variations in surface charge and channel geometry.
Asymptotic approximations and similarity solutions were employed to analyze shock behavior.

Main Results:

A "deionization shock" propagates through microstructures upon selective counterion removal, leaving an ultrapure solution.
Deionization shocks accelerate and sharpen in narrowing channels.
Shocks decelerate, weaken, and may dissipate in widening channels.

Conclusions:

The study reveals surprising nonlinear electrokinetic dynamics driven by the interplay of bulk and surface transport.
The deionization shock phenomenon offers potential applications in separations and energy storage technologies utilizing microstructured electrolytes.