直流偏压对于在玻碳电极上双层类脂膜成膜过程的影响

doi:10.61558/2993-074X.1773

电化学（中英文） ›› 2007, Vol. 13 ›› Issue (1): 6-11. doi: 10.61558/2993-074X.1773

直流偏压对于在玻碳电极上双层类脂膜成膜过程的影响

李裕辉;张洪伟;宋桂兰;张占军;蔡生民;

中国科学院研究生院化学与化学工程学院,中国科学院研究生院化学与化学工程学院,河北经贸大学,中国科学院研究生院化学与化学工程学院,北京大学化学与分子工程学院北京100049,北京100049,河北石家庄050061,北京100049,北京100871

收稿日期:2007-02-28 修回日期:2007-02-28 出版日期:2007-02-28 发布日期:2007-02-28

Effects of Direct Current Bias Potentials on Lipid Membranes Forming on a Glassy Carbon Electrode

LI Yu-hui1,ZHANG Hong-wei1,SONG Gui-lan3,ZHANG Zhan-jun1*,CAI Sheng-min2

(1.University of Chemistry and Chemical Engineering,Graduate School,Chinese Academy of Sciences,Beijing 100049,China,2.College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China,3.Hebei University of Economics and Business,Shijiazhuang 050061,Hebei,China

Received:2007-02-28 Revised:2007-02-28 Published:2007-02-28 Online:2007-02-28

摘要/Abstract

摘要： 应用循环伏安法和电化学阻抗谱研究了直流偏压对卵磷脂在玻碳电极表面自组装成膜过程及其结构的影响.实验发现:无论在正偏压还是负偏压条件下,卵磷脂在玻碳电极上均可组装成膜.施加正偏压时,由于玻碳电极表面所带的正电荷与卵磷脂端基之间的静电作用,使得卵磷脂在电极表面倾向于形成双层的类脂膜,并在0.4V偏压下电极阻抗达到最大值.继续增大电极正向偏压,s-BLM缺陷增加,以至趋于被击穿.提出了适宜的等效电路,并据此非线性拟合电极过程,求得部分阻抗的模型参数.研究发现:膜电容和电荷传递电阻呈现良好的互补效应.

关键词: 双层类脂膜, 循环伏安, 电化学阻抗谱, 直流偏压

Abstract: The effects of direct current(DC) bias voltage on the structure of lipid membranes forming on a glassy carbon electrode(GCE) was investigated by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).The experiment showed that the lipid membranes can be formed with either positive or negative bias potential exerted.When bias voltage was exerted,bilayer lipid membranes tended to form due to the electrostatic interaction between the superficial positive charges on the polarized electrode and the negative charged part of PC.When the positive bias voltage overrun the range,the lacunas on s-BLMs would increase,and the BLMs would be broken.A proper equivalent circuit was nonlinearly fitted,based on the data obtained from the electrochemical process.The result showed that the values of Ret and Cm represented the nicer state of mutual compensation.

Key words: bilayer lipid membrane, cyclic voltammetry, electrochemical impedance spectroscopy, direct current bias voltage

中图分类号:

O646.54

李裕辉, 张洪伟, 宋桂兰, 张占军, 蔡生民, . 直流偏压对于在玻碳电极上双层类脂膜成膜过程的影响[J]. 电化学（中英文）, 2007, 13(1): 6-11.

LI Yu-hui, ZHANG Hong-wei, SONG Gui-lan, ZHANG Zhan-jun, CAI Sheng-min. Effects of Direct Current Bias Potentials on Lipid Membranes Forming on a Glassy Carbon Electrode[J]. Journal of Electrochemistry, 2007, 13(1): 6-11.

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直流偏压对于在玻碳电极上双层类脂膜成膜过程的影响

Effects of Direct Current Bias Potentials on Lipid Membranes Forming on a Glassy Carbon Electrode

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