Can the distance between the working electrode and the counter electrode reach nanometer level?

The distance between that work electrode and the counter electrode can reach nanometer level. According to the relevant published information, the latest research shows that the distance between the working electrode and the counter electrode can reach the nanometer level, and it is easier to form a continuous conductive line by reducing the distance between two metal electrodes to the nanometer level (that is, the nanometer gap electrode pair). Cui Ajuan of Institute of Chemistry, Chinese Academy of Sciences and others cooperated with the micromachining laboratory of Institute of Physics to develop a simple and large-scale method for preparing nano-gap electrode pairs. A very thin aluminum oxide layer is used to create a nano-gap between the two deposited metals, and then the "gold/aluminum oxide/gold" structure on the horizontal plane is prepared by tape stripping technology. Finally, nano-thick alumina was removed by selective chemical etching, and a large number of nano-gap electrode pairs were obtained.