COLIN, Camille; LEVALLOIS, Pierre; BOTSOS-MARGERIT, Ugo; CLEMENT, Franck; ZIGAH, Dodzi; ARBAULT, Stéphane

doi:10.1016/j.bioelechem.2023.108551

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COLIN, Camille

Institut des Sciences Moléculaires [ISM]

LEVALLOIS, Pierre
Institut des Sciences Moléculaires [ISM]

BOTSOS-MARGERIT, Ugo
Institut des Sciences Moléculaires [ISM]

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Article de revue

Ce document a été publié dans

Bioelectrochemistry. 2023-12, vol. 154, p. 108551

Résumé en anglais

Glassy carbon (GC) electrodes are widely used in electroanalytical applications especially in bioelectrochemistry. Their use starts with an efficient surface cleaning and activation protocol, mostly based on surface polishing steps. We studied the use of an oxygen plasma exposure of GC electrodes to replace common polishing procedures. The cyclic voltammetry (CV) responses of ferrocyanide and ferrocenedimethanol were used to compare brand new, surface-polished and plasma-treated GC electrodes. Plasma treatment induces CV responses with improved features, close to theoretical values, as compared to other methods. The plasma effects were quasi-stable over a week when electrodes were stored in water, this being explained by increased surface energy and hydrophilicity. Furthermore, when electroreduction of diazonium was performed on GC electrodes, the surface blockade could be removed by the plasma. Thus, a short oxygen plasma treatment is prone to replace polishing protocols, that display person-dependent efficiency, in most of the experiments with GC electrodes.< Réduire

Mots clés en anglais

glassy carbon

oxygen plasma

ferrocyanide

electron transfer

surface chemistry

diazonium

URI

https://oskar-bordeaux.fr/handle/20.500.12278/199209

DOI

http://dx.doi.org/10.1016/j.bioelechem.2023.108551

Project ANR

Electrophysiologie de la Mitochondrie Cardiaque - ANR-17-CE11-0041

Unités de recherche

CBMN : Chimie & de Biologie des Membranes & des Nano-objets - UMR 5248