Regensburg 2019 – scientific programme
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O: Fachverband Oberflächenphysik
O 40: Poster Tuesday: Adsorption and Catalysis
O 40.6: Poster
Tuesday, April 2, 2019, 18:00–20:00, Poster D
Lattice formation and binding of metal clusters to hexagonal boron nitride on Ir(111) — •Moritz Will1, Nicolae Atodiresei2, Vasile Caciuc2, Tobias Hartl1, Pantelis Bampoulis1, and Thomas Michely1 — 1II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany — 2Peter Grünberg Institut (PGI) and Institute for Advanced Simulation (IAS), Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
Moirés of two-dimensional materials on metal single crystal surfaces have a templating effect upon metal deposition from the gas phase, which can result in the formation of cluster superlattices. In particular, the moiré of hexagonal boron nitride (h-BN) on Ir(111) has been recently found to template Ir clusters into highly regular arrays with a thermal stability against sintering which far exceeds all other known substrates. [1]
Here we analyze the universality of the templating effect of h-BN/Ir(111) and compare the properties of other metal cluster arrangements to Ir clusters on h-BN/Ir(111). Scanning tunneling microscopy reveals cluster lattices of Pt can be grown with a number density per unit cell of n = 1 at room temperature. Au cluster lattices reach n = 0.7 for room temperature deposition, while for the case of Fe, deposition at 40 K enables superlattice formation with n = 0.7, stable at 300 K. Moreover, we analyze in detail for the case of Ir clusters the binding mechanism through selective hybridization of B and N atoms with the underlying substrate.
[1] Will, M., et al., ACS Nano (2018)