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Chemistry LibreTexts


The experiment titled Cyclic Voltammetry at Solid Electrodes is a precursor to this experiment with microelectrodes. Please review the Background and Theory sections of that experiment to prepare for this one. Two online articles of interest are: This article describes how to make microelectrodes, their properties, and illustrates uses and applications. This article is part of the International Union of Pure and Applied Chemistry (IUPAC) commission’s report discussing definition, characterization and applications of microelectrodes.

What is the dimension of a microelectrode and how does it behave electrochemically in comparison to macro-sized electrodes? There are several different geometries and configurations of microelectrodes (e.g., spherical micro-ball, thin cylindrical shaped fiber, tapered microtip, etc.). For the current discussion, the microelectrode will be a flat disk configuration with diameter of tens of micrometers or less. For example, a popular size is a 10 μm diameter glassy carbon, Pt or Au disk. At the extreme of smallness, a microelectrode made from a carbon multi-wall nanotube of 100 nm in diameter has been reported [ref. 1].