Scanning electrochemical microscopy. 38. Application of SECM to the study of charge transfer through bilayer lipid membranes

The use of the scanning electrochemical microscope (SECM) to probe the kine tics of charge-transfer processes at bilayer lipid membranes (BLM) is prese nted. Analysis of the SECM tip response demonstrates that an unmodified BLM behaves as an insulator, whereas a BLM doped with iodine shows some positi ve feedback. The SECM technique thus allows one to probe processes at a BLM and determine the kinetics of the charge-transfer process. The SECM can al so be used to determine the shape of the BLM.