CHARACTERISTICS OF REDOX SYSTEMS ON SELF-ASSEMBLED MONOLAYER-COVERED ELECTRODES

Electrochemical studies on gold electrodes covered with self-assembled monolayers (SAM) of aminoethane thiol (AET), mercaptobenzothiazole (M ET) and octadecyl mercaptan (ODM) have been carried out using cyclic v oltammetry. Study of the influence of these monolayers on the double l ayer capacity of the interfaces involving the Au/SAM electrodes and of the electron transfer kinetics of chosen redox reaction probes, viz., Fe(CN)(6)(4-/3-), Fe2+/3+, hydroquinone/ quinone(H(2)Q/Q) and Cu unde rpotential deposition, offers a wealth of information that can throw l ight on the role of SAMs in allowing/moderating/blocking the electron transfer at such interfaces. These derails are presented and discussed in the paper.