Electrical cross-talk in transient mode of scanning electrochemical microscopy

The theoretical and experimental investigations of the electrical cross-talk in a four-electrode configuration without faradaic interference were performed. It was shown that the common resistance shared by the two working electrodes plays a major role in the electrical response of the system. In the particular case of the scanning electrochemical microscopy, the transient response of the probe to a potential step applied to the substrate results in two-time constants and the cell-time constant of the substrate governs the attainable time constant of the whole system.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The electrical cross-talk in a four-electrode electrochemical experiment was investigated. ► Two time constants are observed on the passive electrode. ► A common electrolyte resistance accounts for this electrical cross-talk.