Formation of a double electric layer on the metal-plastic boundary

A double electric layer is formed on the boundaries of liquid solutions, of a solution and a metal, of a metal and air, and of a metal and a vacuum. Its structure resembles the structure of a plane capacitor. A layer formed on a metal-plastic boundary was experimentally detected in 1953 [1]. A specimen made of two copper plates with a plastic (dielectric) material between them is rapidly stretched. At the time of its rupture, a peak is observed in the screen of an oscillograph indicating the presence of electric current. The highest peaks are observed at the time of fracture of the plastic near the metallic plate or on its boundary. For different plastics, the oscillograph records the presence of currents of both directions. Thus, it is possible to conclude that a double electric layer (DEL) is formed on the metal-plastic boundary, [6].