Results of a study on the electrochemical properties of exfoliated single and multilayer graphene flakes are presented. Graphene flakes were deposited on silicon/silicon oxide wafers to enable fast and accurate characterization by optical microscopy and Raman spectroscopy. Conductive silver paint and silver wires were used to fabricate contacts; epoxy resin was employed as masking coating in order to expose a stable, well defined area of graphene. Both multilayer and monolayer graphene microelectrodes showed quasi-reversible behavior during voltammetric measurements in potassium ferricyanide. However, the standard heterogeneous charge transfer rate constant, k{\deg}, was estimated to be higher for mono-layer graphene flakes.
@article{arxiv.1110.1573,
title = {Electrochemical behaviour of monolayer and bilayer graphene},
author = {Anna T. Valota and Ian A. Kinloch and Kostya S. Novoselov and Cinzia Casiraghi and Axel Eckmann and Ernie W. Hill and Robert A. W. Dryfe},
journal= {arXiv preprint arXiv:1110.1573},
year = {2011}
}