Figure 3:a) Principle of the wide field ElectroChemical Optical Microscope (ECOM). The presence of the ARA layer brings the sensitivity required for probing local electrochemical phenomena at a molecular level. Simultaneously, the upper space is used for controlling and measuring electrochemical processes. This apparatus will allow to link electrochemical measurements and related physical changes at the electrode surface. b) First stage of the electrochemical transfer of copper on gold using a two electrodes set up; V1 - V2 = 200 mV; The V1 electrode is located in the upper right region of the sample, 500 μm away from the zone represented in the image. The distance of this electrode to the surface is also about 500 μ m.