DETECTION OF ELECTRON-TRANSFER BETWEEN SINGLE MONOLAYERS BY A MAXWELL-DISPLACEMENT-CURRENT MEASURING TECHNIQUE

Electron transport between adjacent single monolayers in a two-monolayer system was first detected in the absence of an external electric field by the displacement-current measuring technique. We fabricated junctions incorporating a two-layer system, i.e., a monolayer of sensitizer (S) and a monolayer of electron acceptor (A), and an air gap. We then examined the displacement-current generation in the two-layer system with the application of visible light. It was found that the displacement current was generated in the direction predicted by the motion of electrons, i.e., in a direction from monlayers S to A. Finally, we concluded that the displacement-current measuring technique is very useful for the detection of electron transport in multilayer systems.