THE ELECTROCHEMICAL STUDY OF SELF-ASSEMBLED 1,3-PROPANEDITHIOL ON GOLD

Yuqing Miao (), Jianrong Chen, Xiaohua Wu and Keming Fang
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Yuqing Miao: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Lab of Bioanalysis and Biosensor, Zhejiang Normal University, Jinhua 321004, China
Jianrong Chen: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Lab of Bioanalysis and Biosensor, Zhejiang Normal University, Jinhua 321004, China
Xiaohua Wu: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Lab of Bioanalysis and Biosensor, Zhejiang Normal University, Jinhua 321004, China
Keming Fang: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Lab of Bioanalysis and Biosensor, Zhejiang Normal University, Jinhua 321004, China

Surface Review and Letters (SRL), 2007, vol. 14, issue 01, 111-115

Abstract: The electrochemical behaviors of bare/dithiol-modified gold electrode were studied in the PBS solution with/without dithiols. A pair of current peaks between -1.4 and -0.5 V is related to dithiol adsorption or re-adsorption. An oxidative peak at 0.37 V accompanied by a slight peak at 0.03 V is observed between -0.5 and 0.7 V for the bare gold electrode in the thiol solution, which is due to the formation of bilayer. When the potential is scanned to a very positive value at 1.2 V, a new oxidative peak at 1.07 V appears for the bare gold electrode in the dithiol solution or the PBS solution. The assembled dithiols are desorbed, and gold surface is exposed. The study indicates that the 1,3-propanedithiol modified electrodes should be used during the potential range of -0.8 to 0.8 V to keep the assembled layer stable.

Keywords: 1; 3-Propanedithiol; self-assembled monolayer; dithiol; thiol; self-assembly (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07009128

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