引用本文:
刁鹏, 梅岗, 侯群超, 于峰, 项民, 张琦. 恒电位组装的硫醇单层膜的电化学性质[J]. 物理化学学报,
2005, 21(03): 291-295.
doi:
10.3866/PKU.WHXB20050313
Citation: DIAO Peng, MEI Gang, HOU Qun-Chao, YU Feng, XIANG Min, ZHANG Qi. Electrochemical Properties of Thiol Monolayers Prepared by Constant-Potential Assembly[J]. Acta Physico-Chimica Sinica, 2005, 21(03): 291-295. doi: 10.3866/PKU.WHXB20050313
Citation: DIAO Peng, MEI Gang, HOU Qun-Chao, YU Feng, XIANG Min, ZHANG Qi. Electrochemical Properties of Thiol Monolayers Prepared by Constant-Potential Assembly[J]. Acta Physico-Chimica Sinica, 2005, 21(03): 291-295. doi: 10.3866/PKU.WHXB20050313
恒电位组装的硫醇单层膜的电化学性质
摘要:
采用恒电位组装的方法在金基底上制备了十二硫醇单层膜,用反射傅立叶红外光谱、循环伏安法和电化学阻抗谱对得到的硫醇膜进行了表征.结果表明,恒电位组装1 min即可在金基底上形成没有针孔缺陷的硫醇单层膜.随着恒电位组装时间的增加,硫醇膜上的凹陷点缺陷逐渐减少,致密程度逐渐增加.当恒电位组装时间达到5 min时,得到的硫醇膜与自组装24 h的硫醇膜具有相当的致密度和更少的凹陷点缺陷.
English
Electrochemical Properties of Thiol Monolayers Prepared by Constant-Potential Assembly
Abstract:
The monolayer of dodecanethiol was prepared on ld surface by constant-potential assembly (CPA). The properties of the monolayers were characterized using reflection absorption FT-IR, cyclic voltammetry, and electrochemistry impedance spectroscopy. Experimental results show that monolayers free from pin-hole defects can be obtained after CPA for 1 min. As the assembling time increases, the number of collapsed-site defects decreases and the packing density of the thiol monolayer increases. Compared to the monolayers prepared by self-assembly for 24 h, those obtained by CPA for 5 min have almost identical packing density and less collapsed-site defects.
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