基底电位对硫醇自组装膜形成的影响

电化学（中英文） ›› 2006, Vol. 12 ›› Issue (1): 69-73.

基底电位对硫醇自组装膜形成的影响

刁鹏;王晓宁;侯群超;郭敏;项民;张琦;

北京航空航天大学材料科学与工程学院应用化学系,北京航空航天大学材料科学与工程学院应用化学系,北京航空航天大学材料科学与工程学院应用化学系,北京科技大学冶金与生态工程学院物理化学系,北京航空航天大学材料科学与工程学院应用化学系,北京航空航天大学材料科学与工程学院应用化学系北京100083,北京100083,北京100083,北京100083,北京100083,北京100083

收稿日期:2006-02-28 修回日期:2006-02-28 出版日期:2006-02-28 发布日期:2006-02-28

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

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

Received:2006-02-28 Revised:2006-02-28 Published:2006-02-28 Online:2006-02-28

摘要/Abstract

摘要： 应用电位阶跃法,在不同组装电位下制备金/正十二硫醇自组装单分子膜.交流阻抗谱表征该硫醇膜的电化学性质,发现金基底的电位对硫醇自组装膜的形成有重要影响.在-0.8~-0.4 V的电位区间内,随着组装电位的增加,该自组装膜的致密性、有序性增加,缺陷减少,并于0.4 V时达到最佳.组装电位高于0.4 V,膜的致密性、有序性降低,缺陷增多.本文为硫醇及其衍生物的电位调控组装提供了重要依据.

关键词: 电化学, 自组装膜, 电位控制组装, 硫醇

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.

Key words: Electrochemistry, Self-assembled monolayers, Potential-controlled assembly, Alkanethiol

中图分类号:

O646.5

刁鹏;王晓宁;侯群超;郭敏;项民;张琦;. 基底电位对硫醇自组装膜形成的影响[J]. 电化学（中英文）, 2006, 12(1): 69-73.

DIAO Peng~. Effect of Applied Potentials on the Formation of Self-Assembled Monolayers of Alkanethiol[J]. Journal of Electrochemistry, 2006, 12(1): 69-73.

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链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2006/V12/I1/69

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