title: Electrochemical behavior of monolayer and bilayer graphene.
abstract: 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 a 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°, was estimated to be higher for monolayer graphene flakes.
authors.affiliation: School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
authors.forename: Anna T
authors.initials: AT
authors.lastname: Valota
authors.forename: Ian A
authors.initials: IA
authors.lastname: Kinloch
authors.forename: Kostya S
authors.initials: KS
authors.lastname: Novoselov
authors.forename: Cinzia
authors.initials: C
authors.lastname: Casiraghi
authors.forename: Axel
authors.initials: A
authors.lastname: Eckmann
authors.forename: Ernie W
authors.initials: EW
authors.lastname: Hill
authors.forename: Robert A W
authors.initials: RA
authors.lastname: Dryfe