Electrochemical scanning tunneling microscope
The electrochemical scanning tunneling microscope (EC-STM) is a scanning tunneling microscope that measures the structures of surfaces and electrochemical reactions in solid-liquid interfaces at atomic or molecular scales. == Development == Electrochemical reactions occur in electrolytic solutions—for example electroplating, etching, batteries, and so on.
Source: Wikipedia — Electrochemical scanning tunneling microscope (CC BY-SA 4.0)