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Tailoring the Self-assembly of Melamine on Au (111) via Doping with Cu Atoms
He-xia Shi, Wen-yuan Wang, Zhe Li, Li Wang, Xiang Shao
Department of Chemical Physics, CAS Key Laboratory of Urban Pollutant Conversion, Synergetic, Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
Abstract:
The doping effect of Cu on the self-assembly film of melamine on an Au(111) surface has been investigated with scanning tunneling microscopy (STM). The evaporated Cu adatoms occupy the positions underneath the amino groups and change the hydrogen bonding pattern between the melamine molecules. Accordingly, the self-assembly structure has changed stepwise from a well-defined honeycomb into a track-like and then a triangular structure depending on the amount of Cu adatoms. The interaction between Cu adatom and melamine is moderate thus the Cu adatoms can be released upon mild heating to around 100℃. These findings are different from previous observations of either the coordination assembly or the physically trapped metal adatoms.
Key words:  Melamine  Self-assembly  Scanning tunneling microscopy  Cu adatoms  Hydrogen bonding
FundProject:This work was supported by the National Natural Science Foundation of China (No.91545128,No.21333001,No.91227117) and Ministry of Science and Technology of China (No.2011CB808702),the Fundamental Research Funds for the Central Universities and the Thousand Talent Program for Young Outstanding Scientists of the Chinese Government,and the "Strategic Priority Research Program" of the Chinese Academy of Sciences (XDB01020100).
Cu原子掺杂调控三聚氰胺在Au(111)表面自组装结构
石何霞, 王文元, 李喆, 王利, 邵翔
中国科学技术大学化学物理系, 中国科学院城市污染物转化重点实验室, 中国科学技术大学量子信息与量子科技前沿协同创新中心, 合肥 230026
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DOI:10.1063/1674-0068/30/cjcp1704078
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