SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 75: Poster Session VI: Organic molecules on inorganic substrates: electronic, optical and other properties II
O 75.2: Poster
Mittwoch, 3. März 2021, 13:30–15:30, P
Rotation of Ethoxy and Ethyl Moieties on a Molecular Platform on Au(111) — Torben Jasper-Tönnies1, Manuel Gruber1, Sven Johannsen1, Thomas Frederiksen2, Aran Garcia-Lekue2, Torben Jäkel3, Fynn Roehricht3, Rainer Herges3, and •Richard Berndt1 — 1Institut fur Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098 Kiel — 2Donostia International Physics Center, E-20018 Donostia-San Sebastián; IKERBASQUE, Basque Foundation for Science, E-48013 Bilbao — 3Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität, 24098 Kiel
Molecular rotors have attracted considerable interest for their prospects in nanotechnology. However, their adsorption on supporting substrates, where they may be addressed individually, usually modifies their properties. Here, we investigate the switching of two closely-related three-states rotors mounted on platforms on Au(111) using low-temperature scanning tunneling microscopy and density functional theory calculations. Being physisorbed the platforms retain important gas-phase properties of the rotor. This simplifies a detailed analysis, and permits, for instance, the identification of the vibrational modes involved in the rotation process. The symmetry provided by the platform enables active control of the rotation direction through electrostatic interactions with the tip and charged neighboring adsorbates. The present investigation of two model systems may turn out useful for designing platforms that provide directional rotation and for transferring more sophisticated molecular machines to surfaces.