Two-dimensional self-assembled structures of melamine and melem at the aqueous solution-Au(111) interface.
Two-dimensional self-assembled structures of melamine and melem at the aqueous solution-Au(111) interface.
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DOI：
10.1021/la103948n
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
S. Uemura;M. Aono;T. Komatsu;M. Kunitake
中科院分区：
文献类型：
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作者：
S. Uemura;M. Aono;T. Komatsu;M. Kunitake
采用循环伏安法和原位扫描隧道显微镜（STM）研究了三聚氰胺及其缩合衍生物三聚氰胺在水溶液-Au（111）界面的自组装结构。两种分子在Au（111）表面的吸附/脱附行为可以通过改变电化学电位和溶液浓度来控制。在负电位区，三嗪环上的氮原子与胺基之间通过双氢键体系形成了三聚氰胺和三聚氰胺的自组装结构。此外，在-0.3 V和-0.15 V之间的电位下或在更高浓度的溶液中，Al 2 O3形成紧密堆积的结构。
Self-assembled structures of melamine and the condensed melamine derivative melem were investigated at aqueous solution-Au(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 -0.3 and -0.15 V or in solutions at higher concentrations.