School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
ACS Nano. 2011 Nov 22;5(11):8809-15. doi: 10.1021/nn202878f. Epub 2011 Oct 12.
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.
本文介绍了剥离的单层和多层石墨烯薄片的电化学性能研究结果。将石墨烯薄片沉积在硅/氧化硅晶片上，通过光学显微镜和拉曼光谱进行快速准确的表征。使用导电银漆和银线制作电极；环氧树脂用作掩蔽涂层，以暴露稳定、定义良好的石墨烯区域。在铁氰化钾的伏安测量中，多层和单层石墨烯微电极都表现出准可逆行为。然而，对于单层石墨烯薄片，估计标准的非均相电子转移速率常数 k°更高。
