Two-dimensional self-assembly of melem and melemium cations at pH-controlled aqueous solution–Au(111) interfaces under electrochemical control

2016, Volume 10, Issue 2

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Frontiers of Chemical Science and Engineering >> 2016, Volume 10, Issue 2 doi: 10.1007/s11705-016-1564-4

Two-dimensional self-assembly of melem and melemium cations at pH-controlled aqueous solution–Au(111) interfaces under electrochemical control

. Department of Advanced Materials Sciences, Faculty of Engineering, Kagawa University, Kagawa 761-0396, Japan.. Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan

Accepted: 2016-03-24 Available online: 2016-05-19

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Abstract

Two-dimensional self-assembly of melem at pH-controlled aqueous solution-Au(111) interfaces has been investigated by electrochemical scanning tunneling microscopy. In the solutions with pH>p of melem, two ordered self-assembled structures (honeycomb and close-packed structures) and one disordered fibrillar structure were observed as a function of the surface coverage of melem controlled by the electrode potential. In contrast, in the acidic solution with pH

Keywords

self-assembly ; scanning tunneling microscopy ; electrochemistry ; structural phase transition ; melem

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