Effect of Applied Potentials on the Formation of Self-Assembled Monolayers of Alkanethiol

Authors

DIAO Peng, *1),WANG Xiao-ning~(1),HOU Qun-Chao~(1),GUO Min~(2),XIANG Min~(1),ZHANG Qi~(1)(1.Department of Applied Chemistry,School of Materials Science & Engineering,Beijing University of Aeronautics & Astronautics,Beijing 100083,China,2.Department of Physical Chemistry,School of Metallurgical & Ecological Engineering,University of Science&Technology Beijing,Being 100083,China;

Abstract

The self-assembled monolayers(SAMs)of n-dodecanethiol were prepared on gold substrates under electrochemical conditions using potential step technique.Electrochemical impedance spectroscopy was employed to characterize the SAMs prepared under different substrate potentials.It is found that the potential applied to gold substrate has great influence on the formation of SAMs.Within potential regime-0.8 V to 1.2 V,the increase of applied potential firstly leads to the formation of SAMs with higher packing density,better ordering and less defects.However,after reaching the maximum at 0.4 V,the packing density and the ordering of SAMs begin to deteriorate when the substrate potential is further increased.This work provides solid experimental basis for potential-controlled formation of SAMs from alkanethiols and their derivatives.

Keywords

Electrochemistry, Self-assembled monolayers, Potential-controlled assembly, Alkanethiol

DOI Link

https://doi.org/10.61558/2993-074X.1701

Publication Date

2006-02-28

Online Available Date

2006-02-28

Revised Date

2006-02-28

Received Date

2006-02-28

Recommended Citation

DIAO Peng. Effect of Applied Potentials on the Formation of Self-Assembled Monolayers of Alkanethiol[J]. Journal of Electrochemistry, 2006 , 12(1): 69-73.
DOI: 10.61558/2993-074X.1701
Available at: https://jelectrochem.xmu.edu.cn/journal/vol12/iss1/14