Issue 21, 2013

The effect of channel height and electrode aspect ratio on redox cycling at carbon interdigitated array nanoelectrodes confined in a microchannel

Abstract

Redox cycling is a commonly used electrochemical sensing scheme for enhancing faradaic current signals. This effect can be improved by either optimizing electrode geometries or restricting electrochemical reactions within a limited volume. Here, we demonstrate a simple batch fabrication of 1 : 1 aspect ratio carbon interdigitated array nanoelectrodes integrated in a polydimethylsiloxane microchannel that enables current amplification by up to 1116 times. We also examine the factors that influence the effect of redox cycling, including the electrode aspect ratio and channel height, by using experiments and simulations.

Graphical abstract: The effect of channel height and electrode aspect ratio on redox cycling at carbon interdigitated array nanoelectrodes confined in a microchannel

Supplementary files

Article information

Article type
Paper
Submitted
03 May 2013
Accepted
06 Aug 2013
First published
08 Aug 2013

Analyst, 2013,138, 6404-6411

The effect of channel height and electrode aspect ratio on redox cycling at carbon interdigitated array nanoelectrodes confined in a microchannel

J. Heo, Y. Lim and H. Shin, Analyst, 2013, 138, 6404 DOI: 10.1039/C3AN00905J

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