Zhang, Hai-Ming and Xie, Zhao-Xiong and Long, La-Sheng and Zhong, Hui-Ping and Zhao, Wei and Mao, Bing-Wei and Xu, Xin and Zheng, Lan-Sun (2008) One-step preparation of large-scale self-assembled monolayers of cyanuric acid and melamine supramolecular species on Au(111) surfaces. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (11). pp. 4209-4218.
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Official URL: http://pubs.acs.org/doi/full/10.1021/jp076916a
In this paper, a kind of robust self-assembled monolayer (SAM) directed by lateral triple hydrogen bonding interactions was prepared by a one-step reaction of cyanuric acid (CA) and melamine (M) molecules on reconstructed Au(111) surfaces in ambient conditions. The structures of the CA.M SAMs were found to be similar to those of bulk crystals. These physisorbed SAMs, directed by triple hydrogen bonds, were found to be stable at the air/substrate interface and possessed a high thermal stability (up to 400 K). According to the high-resolution STM images, a commensurate structure with respect to the reconstructed Au(111) surfaces was established. Combined with density functional theory (DFT) calculations, the roles of the adsorbate-adsorbate and the adsorbate-substrate interactions, as well as the origin of the high stability of the CA.M SAMs, were discussed. In addition to the preparation of the CA.M SAMs, SAMs of melamine and cyanuric acid molecules alone were also studied on the Au(111) surfaces. Chiral structures were found in both of these SAMs. Structural models of melamine SAMs and cyanuric acid SAMs were established.
|Uncontrolled Keywords:||self assembled monolayers - supramolecular species - microscopy - gold surface|
|Subjects:||Analytical Science > Microscopy and probe methods|
Material Science > Nanochemistry
|Deposited On:||02 Sep 2009 11:29|
|Last Modified:||02 Sep 2009 11:29|
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