Easy cleaning plus stable activation of glassy carbon electrode surface by oxygen plasma
CLEMENT, Franck
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
ARBAULT, Stéphane
Chimie et Biologie des Membranes et des Nanoobjets [CBMN]
Institut des Sciences Moléculaires [ISM]
< Reduce
Chimie et Biologie des Membranes et des Nanoobjets [CBMN]
Institut des Sciences Moléculaires [ISM]
Language
EN
Article de revue
This item was published in
Bioelectrochemistry. 2023-12, vol. 154, p. 108551
English Abstract
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 ...Read more >
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.Read less <
English Keywords
glassy carbon
oxygen plasma
ferrocyanide
electron transfer
surface chemistry
diazonium
ANR Project
Electrophysiologie de la Mitochondrie Cardiaque - ANR-17-CE11-0041