Study of Electron transfer kinetics on Self-assembled monolayers of alkanethiols in non-aqueous solvents

摘要

We find from literature that relatively less attention has been paid to the study of blocking properties of alkanethiol SAMs in non-aqueous solvents primarily due to their perceived instability in these solvents.In this study we investigate by cyclic voltammetry and Electrochemical Impedance Spectroscopy the barrier properties of alkanethiol SAMs to the ferrocene electron transfer reaction in different non-aqueous solvents.We find that the electron transfer through the monolayer is facilitated by the ability of the solvent molecules to interact with the alkanethiol molecule and disorganize the monolayer.We have also evaluated the barrier properties of alkanethiol SAMs formed in different non-aqueous solvents.Our impedance results show that the barrier properties of the SAMs depend to a large extent on the solvent used as adsorption medium.