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
Publication Date
2001-08-28
Online Available Date
2001-08-28
Revised Date
2001-08-28
Received Date
2001-08-28
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): Article 9.
DOI: 10.61558/2993-074X.3257
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol7/iss3/9
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