期刊
NANO LETTERS
卷 16, 期 3, 页码 1884-1889出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b05026
关键词
Self-assembly; rotor arrays; scanning tunneling microscopy; dispersion-corrected density-functional tight-binding; silver surface
类别
资金
- ERC Advanced Grant MolArt [247299]
- Marie Curie Intra-European Fellowship (project NASUMECA) [274842]
- Marie Curie International Incoming Fellowship (Project NANOULOP) [302157]
- Alexander von Humboldt Foundation
- Helmholtz-Zentrum Berlin (HZB)
Bisphenol A (BPA) aggregates on Ag(111) shows a polymorphism between two supramolecular motifs leading to formation of distinct networks depending on thermal energy. With rising temperature a dimeric pairing scheme reversibly converts into a trimeric motif, which forms a hexagonal superstructure with complex dynamic characteristics. The trimeric arrangements notably organize spontaneously into a self-assembled one-component array with supramolecular BPA rotors embedded in a two-dimensional stator sublattice. By varying the temperature, the speed of the rotors can be controlled as monitored by direct visualization. A combination of scanning tunneling microscopy and dispersion corrected density-functional tight-binding (DFTB-vdW(surf)) based molecular modeling reveals the exact atomistic position of each molecule within the assembly as well as the driving force for the formation of the supramolecular rotors.
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