Electrochemical Single-core Microelectrodes 電化學單核微電極

Product Information

Thomas RECORDING electrochemical disc microelectrodes were originally designed for SECM (Scanning ElectroChemical Microscopy), but they are also suitable as working electrodes for other electrochemical applications like voltammetry or amperometry.

The electrodes are based on unique single metal core fibers of platinum or platinumtungsten alloy, insulated with quartz glass.

A special manufacturing process guarantees a highly centered metal core within the glass insulation and a high reproducibility of the RG ratio.

Figure 1 Thomas electrochemical electrode with a pulled and disc shape ground electrode tip

Compared to widely used borosilicate glass, quartz glass is a much better insulator with a lower loss factor (0,0038 for quartz glass, app. 0,58 for borosilicate glass). Quartz glass insulated electrodes have lower electrical background noise and therefore a better signal to noise ratio.

Figure 2 Cyclic voltammogram recorded with a Thomas platinum electrode

Figure 2 demonstrates the performance of Thomas RECORDING electrochemical microelectrodes. 
Every electrode produced by Thomas RECORDING is microscopically controlled and tested by cyclic voltammetry. The test results for each electrode are documented by test certificates enclosed to your shipment. The electrochemical active diameter is determined for every individual electrode by measuring the diffusion limiting current.