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O: Fachverband Oberflächenphysik

O 34: Poster Session III: Organic molecules on inorganic substrates: Adsorption and growth III

O 34.2: Poster

Dienstag, 2. März 2021, 10:30–12:30, P

Comparison of the adsorptions of ethanol and azobenzene molecules on single-layer hexagonal boron nitride on Rh(111) — •Krisztián Palotás^1,2, Arnold Farkas^2,3, Ádám Szitás², Dániel Jurdi², Richárd Gubó^2,3, Tibor Pásztor², Tibor Ajtai^2,3, László Óvári^2,3, János Kiss², András Berkó², and Zoltán Kónya² — ¹Wigner Research Center for Physics, Budapest, Hungary — ²University of Szeged, Szeged, Hungary — ³ELI-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 [1] and azobenzene [2] 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 [2], but no selectivity for the ethanol adsorption [1]. The latter finding is in line with experimental observations of a very weak interaction between ethanol and the hBN/Rh(111) substrate [1]. Finally, we analyze the trans- and cis-azobenzene adsorption and azobenzene-azobenzene interactions in great details by using theoretical means [2]. These latter results contribute to the understanding of the behavior of photo-switching molecules on nanotemplated surfaces.

[1] A. P. Farkas et al. Appl. Catal. A: Gen. 592, 117440 (2020).

[2] Á. Szitás et al. J. Phys. Chem. C 124, 14182 (2020).