Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 69: Poster Wednesday: Organic Molecules on Inorganic Surfaces
O 69.10: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B2
Motorized molecules studied by scanning tunneling microscopy — •Peter Jacobson1, James Tour2, and Leonhard Grill1 — 1Department of Physical Chemistry, University of Graz, 8010 Graz, Austria — 2Department of Chemistry, Rice University, Houston, Texas 77005, USA
Motorized molecules are envisioned as cargo carriers at the nanoscale. Critical to their success is the controlled activation of motion using external stimuli. In Feringa type motors, UV light triggers a sequence of isomerization and helical inversion steps leading to the unidirectional rotation of the motor. When incorporated into larger molecules, these motors are a potential source of unidirectional translation at surfaces. Scanning probe microscopy is an ideal tool to investigate the single molecule dynamics of these molecular machines, but commonly used metal substrates have drawbacks, such as the quenching of excited states by conduction electrons. An alternate approach is to deposit them on semiconducting substrates, thereby reducing the adsorption strength of the molecule on the surface and removing a potential path for quenching. Here, I will present initial results on motorized molecules containing a Feringa motor on semiconducting surfaces.