Study of tunneling electron transfer on Graphene nanoplatelet /Self assembled monolayer modified gold electrode by electrochemical techniques

The electrochemical property of graphene nanoplatelet on self assembled monolayer (SAM) was investigated. A gold electrode was modified by octanethiol to produce SAM, next graphene nanoplatelet adsorbed on SAM to obtain a graphene/SAM electrode. The prepared electrode was characterized by ferrocenemethanol as a redox probe, and cyclic voltamettry (CV) and scanning electrochemical microscopy (SECM) techniques. The experimental results showed that the tunneling electron transfer can be restored by graphene nanopalatelet. The electron transfer rate of ferrocenemethanol on graphene/SAM modified electrode was evaluated quantitatively by SECM, and equal to 4.5× 10-2 cm s -1 .