study of tunneling electron transfer on graphene nanoplatelet /self assembled monolayer modified gold electrode by electrochemical techniques

The electrochemical property of graphenenanoplatelet on self assembled monolayer(sam) was investigated. a gold electrodewas modified by octanethiol to producesam, next graphene nanoplateletadsorbed on sam to obtain agraphene/sam electrode. the preparedelectrode was characterized byferrocenemethanol as a redox probe, andcyclic voltamettry (cv) and scanningelectrochemical microscopy (secm)techniques. the experimental resultsshowed that the tunneling electron transfercan be restored by graphene nanopalatelet.the electron transfer rate offerrocenemethanol on graphene/sammodified electrode was evaluatedquantitatively by secm, and equal to 4.5×10-2cm s-1.