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Theory and Experiments of Transport at Channel Microband Electrodes Under Laminar Flow. 3. Electrochemical Detection at Electrode Arrays under Steady State

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Christian Amatore*, Nicolas Da Mota, Catherine Sella and Laurent Thouin*

Ecole Normale Supérieure, Département de Chimie, UMR CNRS-ENS-UPMC 8640 “Pasteur”, 24 rue Lhomond, F-75231 Paris Cedex 05, France

Anal. Chem., 2010, 82 (6), pp 2434–2440

DOI: 10.1021/ac902788v

Publication Date (Web): February 25, 2010

* To whom correspondence should be addressed: e-mail christian.amatore@ens.fr (C.A.) or laurent.thouin@ens.fr (L.T.).

Section:

Inorganic Analytical Chemistry

Abstract

Microband arrays improve the analytical performance and information content of electrochemical detection in flow channel relative to single-electrode configurations. However, exploiting their full advantages requires a detailed understanding of the properties of arrays, which depend on their geometry and on the hydrodynamic regimes established inside the microfluidic channel. This paper investigates the influence of two main operating situations (sequential and coupling regimes) on steady-state amperometric responses of microband arrays performing under laminar flow conditions. Simulations and experimental measurements showed that the resulting properties of the arrays are a function of the number of electrodes and average ratio between gaps and electrode widths, whether the layout of the arrays is regular or not. Since the contribution of each electrode can be finely tailored, this allows the arrays to be designed and adapted to a wide variety of experimental demands.

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Channel Microband Chronoamperometry: From Transient to Steady-State Regimes
Christian Amatore, Célia Lemmer, Catherine Sella, and Laurent Thouin
Analytical Chemistry2011 Article ASAP
- Channel Microband Chronoamperometry: From Transient to Steady-State Regimes
  Christian Amatore, Célia Lemmer, Catherine Sella, and Laurent Thouin
  Analytical Chemistry2011 Article ASAP
  Chronoamperometric transient regimes were investigated at a single channel microband electrode during chronoamperometric measurements in a microchannel continuously filled by a redox solution. Simulations were performed by spanning a wide range of ...
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