Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 54: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures III

O 54.5: Vortrag

Mittwoch, 14. März 2018, 11:45–12:00, MA 004

Bishop diffusion involving a chiral flip — •Simon Aeschlimann^1,4, Felix Kling¹, Chiara Paris², Andrea Floris^2,3, Lev Kantorovich², Ralf Bechstein¹, and Angelika Kühnle¹ — ¹Institute of Physical Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55099 Mainz, Germany — ²Department of Physics, King's College London, London WC2R 2LS, United Kingdom — ³School of Mathematics and Physics, University of Lincoln, Brayford Pool, Lincoln LN6 7TS, United Kingdom — ⁴Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz, Germany

Molecular surface diffusion is one of the most fundamental process in nature with far-reaching impact on a wide range of fields including, e.g., catalysis, sensing and surface functionalization. So far, molecular surface diffusion studies have mainly been limited to high-symmetry surfaces possessing rotational symmetry. Here, using the low-symmetry (10.4) surface of calcite, we present a novel molecular diffusion mechanism that can be described by the bishop move in chess, meaning that only half of the existing lattice sites are accessible for an individual molecular species. Interestingly, due to the only existing symmetry operation of the surface, a glide reflection symmetry, this bishop movement is inevitably associated with a flip in the chiral adsorption footprint of the molecular species towards the surface. Here, we demonstrate the pivotal influence of the surface symmetry on the detailed diffusion mechanism, including the adsorption chirality.