Two-dimensional self-assembled structures of melamine and melem at the aqueous solution-Au(111) interface

Shinobu Uemura; Masashi Aono; Tamikuni Komatsu; Masashi Kunitake

doi:10.1021/la103948n

Two-dimensional self-assembled structures of melamine and melem at the aqueous solution-Au(111) interface

Langmuir. 2011 Feb 15;27(4):1336-40. doi: 10.1021/la103948n. Epub 2010 Dec 2.

Authors

Shinobu Uemura¹, Masashi Aono, Tamikuni Komatsu, Masashi Kunitake

Affiliation

¹ Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan.

PMID: 21126043
DOI: 10.1021/la103948n

Abstract

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.