Citation: Peng DIAO, Dian Lu JIANG, Xiao Li CUI, Deng Ping GU, Ru Ting TONG, Bing ZHONG. Assessment of Defects and Collapsed Sites in Self-Assembled Alkanethiol Monolayer on Gold by Cyclic Voltammetry and A.C.Impedance[J]. Chinese Chemical Letters, ;1998, 9(12): 1115-1118. shu

Assessment of Defects and Collapsed Sites in Self-Assembled Alkanethiol Monolayer on Gold by Cyclic Voltammetry and A.C.Impedance

1.
Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001;
2.
Department of Chemistry, Hebei Teacher's University, Shijiazhuang 050016

Received Date: 4 May 1998

Fund Project: This work is supported by the Science Foundation of Hebei Province.

Self-assembly of octadecyl mercaptan on gold was investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Results of CV experiments show that there are no structural defects exposed directly to the redox couple in solution, but EIS experiments indicate that collapsed sites exist in the monolayer. A method to estimate the degree of disorder in the Au/thiol monolayer surface is proposed by using admittance plane plot.
- Self-assembled monolayer,
- cyclic voltammetry,
- a.c. impedance,
- ideally polarizable electrode,
- surface roughness
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