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O: Fachverband Oberflächenphysik
O 73: Organic Molecules on Inorganic Substrates V: Adsorption, Growth and Networks
O 73.1: Vortrag
Mittwoch, 18. März 2020, 15:00–15:15, TRE Phy
Comparison of the adsorptions of ethanol and azobenzene molecules on single-layer hexagonal boron nitride on Rh(111) — •Krisztián Palotás1,2,3, Arnold Farkas3,4, Ádám Szitás3, Dániel Jurdi3, Richárd Gubó3,4, Tibor Pásztor3, László Óvári3,4, János Kiss3, András Berkó3, and Zoltán Kónya3 — 1Budapest University of Technology and Economics, Budapest, Hungary — 2Wigner Research Center for Physics, Budapest, Hungary — 3University of Szeged, Szeged, Hungary — 4ELI-ALPS, Szeged, Hungary
The nanomesh structure of single-layer hexagonal boron nitride (hBN) on various metal surfaces can be used as a nanotemplate for molecular adsorption. Possible applications can be molecular electronics, heterogeneous catalysis, sensing, or light harvesting. We investigate the adsorption properties of ethanol and azobenzene molecules on the hBN/Rh(111) surface by density functional theory calculations and experimental methods. We find high selectivity of the nanomesh structure for the azobenzene adsorption, but no selectivity for the ethanol adsorption. The latter finding is in line with experimental observations of a very weak interaction between ethanol and the hBN/Rh(111) substrate. Finally, we analyze the trans- and cis-azobenzene adsorption and azobenzene-azobenzene interactions in great details by using theoretical means. These results contribute to the understanding of the behavior of photo-switching molecules on nanotemplated surfaces.