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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 shu

Electrochemical Properties of Thiol Monolayers Prepared by Constant-Potential Assembly

1.
Department of Applied Chemistry, School of Materials Science ＆Engineering, Beijing University of Aeronautics ＆ Astronautics, Beijing　100083

Received Date: 23 September 2004
Available Online: 15 March 2005

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.
- Electrochemistry; Self-assembled monolayers(SAMs); Constant-potential assembly; Thiols; Pinhole defect
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