Multiscale tailored electrode surfaces in bioelectrocatalysis

Rafael Szamocki 1,2Stephane Reculusa 3Rolf Hempelmann 2Serge Ravaine 3Phil Bartlett 4Alexander Kuhn 1

1. Laboratoire d'Analyse Chimique par Reconnaissance Moléculaire (LACReM), 16 avenue Pey Berland, Pessac 33607, France
2. University of Saarbruecken, Institute of Physical Chemistry, Saarbrücken 66123, Germany
3. Centre de Recherche Paul Pascal, Avenue Albert Schweitzer, Pessac 33600, France
4. University of Southampton, Department of Chemistry, Southampton SO17 1BJ, United Kingdom

Abstract

In the last few years we have developed and used approaches that allow us to tailor the physico-chemical properties of modified electrodes at several scales. The different scales of organisation include: (a) the molecular scale for the engineering and the surface self-assembly of a redox mediator [1,2] (b) the supramolecular scale for the surface assembly of mediator, coenzyme and enzyme using non-covalent interactions [3,4] (c) the nanometer to submicrometer scale for the highly organized meso- and macroporous electrode surfaces [5,6] (d) the micrometer scale for the functionalised microelectrodes obtained by using ingredients (a)-(c). In this way, the overall bioelectrocatalytic current can be easily amplified by more than one order of magnitude, as compared to a flat electrode surface. This allows to increase significantly the detection limit and sensitivity of such a device when used as a biosensor, or the power output in the case of a biofuel cell.

[1] N. Mano, et al., J. Electroanal. Chem., 477 (1999) 79.
[2] N. Mano, et al., Electrochem .Comm., 10 (2001) 585.
[3] A. Kuhn, et al., Electroanalysis, 13 (2001) 770.
[4] A. Kuhn, et al., Biosens.&Bioelectron., 16 (2001) 653.
[5] A. Kuhn, et al., Electrochem. Comm., 5 (2003) 747.
[6] A. Kuhn, et al., J. Electroanal. Chem., 579 (2005) 181.

 

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Presentation: Keynote lecture at SMCBS'2005 Workshop, by Alexander Kuhn
See On-line Journal of SMCBS'2005 Workshop

Submitted: 2005-08-01 15:35
Revised:   2009-06-07 00:44