Electrochemical behaviour of monolayer and bilayer graphene
  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. 
Anna T. Valota, Ian A. Kinloch, Kostya S. Novoselov, Cinzia Casiraghi,   Axel Eckmann, Ernie W. Hill, Robert A.W. Dryfe
cond-mat.mes-hall