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Dynamics of Spatially Confined Bisphenol A Trimers in a Unimolecular Network on Ag(111)

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Citation

Lloyd, J. A., Papageorgiou, A. C., Fischer, S., Oh, S. C., Saǧlam, Ö., Diller, K., et al. (2016). Dynamics of Spatially Confined Bisphenol A Trimers in a Unimolecular Network on Ag(111). Nano Letters, 16(3), 1884-1889. doi:/10.1021/acs.nanolett.5b05026.


Cite as: https://hdl.handle.net/21.11116/0000-000A-BB2B-4
Abstract
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-vdWsurf) 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.