The Influence of Membrane Resistance on the Electrochemical Behavior of Gold Electrode Modified by Self-assembled Monolayer

Authors

Xiao-li CUI, Dept. of Chem., Fudan Univ., Shanghai 200433, China
Zhi-yu JIANG, Dept. of Chem., Fudan Univ., Shanghai 200433, ChinaFollow

Corresponding Author

Zhi-yu JIANG(zyjiang@fudan.ac.cn)

Abstract

The electrochemical behavior of gold electrode modified by hexadecanethiol self-assembled monolayer (SAM) in the solution of Fe(CN)₆^3-/Fe(CN)₆^4- was investigated by cyclic voltammetry and ac impedance spectroscopy. The pinhole-free SAM-modified gold electrode has excellent blocking properties to the interfacial electron transfer from redox couple in solution to the substrate. The current increased exponentially with the overpotential at the high potential region. A good linear relationship between ln(I/η) and η_1/2 was observed. A model system Au/SAM/Hg was constructed and its I～V curve was measured. Similar phenomena were observed. There was also a linear relationship between ln(I/V) and V_1/2 at high voltage region. It is proposed that the characteristic of pinhole-free SAM-modified gold electrode in solution of Fe(CN)₆^3-/Fe(CN)₆^4- mainly belongs to the resistance of the self-assembled monolayer itself.

Keywords

Self-assembled monolayers, Modified electrode, Resistance of membrane, Resistance polarization

DOI Link

https://doi.org/10.61558/2993-074X.3257

Publication Date

2001-08-28

Online Available Date

2001-08-28

Revised Date

2001-08-20

Received Date

2000-11-13

Recommended Citation

Xiao-li CUI, Zhi-yu JIANG. The Influence of Membrane Resistance on the Electrochemical Behavior of Gold Electrode Modified by Self-assembled Monolayer[J]. Journal of Electrochemistry, 2001 , 7(3): 270-275.
DOI: 10.61558/2993-074X.3257
Available at: https://jelectrochem.xmu.edu.cn/journal/vol7/iss3/9