Citation: Peng DIAO, Min GUO, Ru Ting TONG. Characterization of Formation Kinetics of Self-Assembled Thiol Monolayers on Gold by Electrochemical Impedance Spectroscopy[J]. Chinese Chemical Letters, ;2000, 11(12): 1085-1088. shu

Characterization of Formation Kinetics of Self-Assembled Thiol Monolayers on Gold by Electrochemical Impedance Spectroscopy

1.
Department of Chemistry, Hebei Teacher's University, Shijiazhuang 050016;
2.
Department of Traditional Chinese Pharmacy, Traditional Chinese Medicine College, Hebei Medical University, Shijiazhuang 050091

Received Date: 16 March 2000

Self-assembled monolayers of octadecanethiol (ODT) on gold have been studied by electrochemical impedance spectroscopy (EIS). The fractional coverage has been examined as a function of immersion time of Au in ODT deposition solution. The fractional coverage exhibits two distinct adsorption steps:an initial rapid step followed by a slow one. The fractional coverage of ODT monolayer increases sharply from zero to more than 99% of its maximum within the first minute. However, it takes a day for the fractional coverage to approach its final value.
- Self-assembled thiol monolayer,
- electrochemical impedance spectroscopy,
- adsorption kinetics
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