Influence of an external magnetic field on the formation of self-assembled monolayers of dodecanethiol on polycrystalline gold electrode

Jiongjia Cheng; Jianyuan Dai; Jing Jin; Zhiguo Li; Yongbo Sun; Shuping Bi

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Influence of an external magnetic field on the formation of self-assembled monolayers of dodecanethiol on polycrystalline gold electrode

Jiongjia Cheng,Jianyuan Dai,Jing Jin #,Zhiguo Li,Yongbo Sun,Shuping Bi *

School of Chemistry and Chemical Engineering,Nanjing University

*Correspondence author

#Submitted by

Subject:

Funding: 教育部博士点基金（No.20050284030）

Opened online:13 January 2009

Accepted by: none

Citation: Jiongjia Cheng,Jianyuan Dai,Jing Jin.Influence of an external magnetic field on the formation of self-assembled monolayers of dodecanethiol on polycrystalline gold electrode[OL]. [13 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27743

This paper reports the preparation of dodecanethiol self-assembled monolayers (C12SH-SAMs) on polycrystalline gold electrodes in a magnetic field. The qualities of C12SH-SAMs were characterized by both cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results show that highly dense and well-ordered SAMs could form in a relatively short time (3 h), which had similar properties as the SAMs formed by common immersing protocol (24 h), indicating that the rate of SAMs formation increased under an external magnetic field compared with the natural self-assembly process. Moreover, the results of CV and EIS measurements also suggested that the presence of a magnetic field had influenced the properties of the SAMs; the stronger magnetic intensity can help to obtain more denser and well-ordered SAMs. This may be due to the magnetohydrodynamic effect and the orientation function of magnetic field on molecules.

Keywords:Dodecanethiol;Polycrystalline gold electrode;Self-assembly;C12SH-SAMs;Magnetic field

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