Electrochemical behaviour of monolayer and bilayer graphene

Details Electrochemical behaviour of monolayer and bilayer graphene Electrochemical behaviour of monolayer and bilayer graphene

2011-10-07

arxiv.org/abs/1110.1573v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

20 pages, 8 figures. To appear in ACS Nano

Scientific paper

10.1021/nn202878f

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.

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