Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 46: Poster Organic Molecules on Inorganic Substrates: Electronic, Optical and Other Properties
O 46.4: Poster
Tuesday, March 18, 2025, 18:00–20:00, P2
STM Investigation of Molecular Double Motors — •Ken Kolar1, Grant Simpson1, Ben Feringa2, and Leonhard Grill1 — 1Dept. of Physical Chemistry, University of Graz, Austria — 2Stratingh Institute for Chemistry, University of Groningen, Netherlands
A molecular motor is a molecule with stator and rotor chemical groups which undergo directional motion relative to each other. They represent potential building blocks for nanoscale machinery and their motion on surfaces is of particular interest. With high-resolution imaging from a scanning tunnelling microscope (STM), we revealed distinct appearances of different conformers of a molecule containing two motor units. Furthermore, motion induced by voltage pulses from the STM tip was studied in detail, investigating unidirectionality. Finally, double motors with additional alkane chains attached to them were deposited, showing distinguishable appearances. The experiments showed that the alkane chain conformation can impact the motion of the molecules.
Keywords: Molecular Motors; STM