Self-Induced Convection at Microelectrodes via Electroosmosis and Its Influence on Impact Electrochemistry

Taghi Moazzenzade; Xiaojun Yang; Luc Walterbos; Jurriaan Huskens; Christophe Renault; Serge G. Lemay

doi:10.1021/jacs.0c08450

Self-Induced Convection at Microelectrodes via Electroosmosis and Its Influence on Impact Electrochemistry

Taghi Moazzenzade, Xiaojun Yang, Luc Walterbos, Jurriaan Huskens, Christophe Renault, Serge G. Lemay^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

Faradaic reactions at low supporting electrolyte concentrations induce convection via electroosmotic flows. Here we combine finite-element simulations and electrochemical measurements on microparticles at ultramicroelectrodes to explore this effect. We show that convection becomes the dominant form of mass transport for experiments at low salt concentrations, violating the common assumption that convection can be neglected.

Original language	English
Pages (from-to)	17908-17912
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	142
Issue number	42
DOIs	https://doi.org/10.1021/jacs.0c08450
Publication status	Published - 21 Oct 2020

Keywords

UT-Hybrid-D

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10.1021/jacs.0c08450Licence: CC BY-NC-ND

Moazzenzade-2020-Self-induced-convection-at-microeleFinal published version, 1.66 MBLicence: CC BY-NC-ND

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AU - Walterbos, Luc

AU - Huskens, Jurriaan

AU - Renault, Christophe

AU - Lemay, Serge G.

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AB - Faradaic reactions at low supporting electrolyte concentrations induce convection via electroosmotic flows. Here we combine finite-element simulations and electrochemical measurements on microparticles at ultramicroelectrodes to explore this effect. We show that convection becomes the dominant form of mass transport for experiments at low salt concentrations, violating the common assumption that convection can be neglected.

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Self-Induced Convection at Microelectrodes via Electroosmosis and Its Influence on Impact Electrochemistry

Abstract

Keywords

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Current-blockade particle-impact electrochemistry: A single-entity approach for digital (bio)sensing

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