Two-Dimensional Self-Assembled Structures of Melamine and Melem at the Aqueous Solution鈭扐u(111) Interface

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• 作者：Shinobu Uemura ; Masashi Aono ; Tamikuni Komatsu ; Masashi Kunitake
• 刊名：Langmuir
• 出版年：2011
• 出版时间：February 15, 2011
• 年：2011
• 卷：27
• 期：4
• 页码：1336-1340
• 全文大小：1009K
• 年卷期：v.27,no.4(February 15, 2011)
• ISSN：1520-5827

文摘

Self-assembled structures of melamine and the condensed melamine derivative melem were investigated at aqueous solution鈭扐u(111) interfaces by cyclic voltammetry and in situ scanning tunneling microscopy (STM) observation. The adsorption/desorption behaviors of both molecules on Au(111) surfaces could be controlled by varying the electrochemical potential and solution concentration. In the negative potential region, self-assembled structures of melem and melamine were constructed by double hydrogen bonding systems between nitrogen atoms of triazine rings and amine groups. In addition, melem formed a closely packed structure at potentials of between 鈭?.3 and 鈭?.15 V or in solutions at higher concentrations.