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O: Fachverband Oberflächenphysik
O 63: Focus Session: Functional Molecules at Surfaces III
O 63.7: Vortrag
Mittwoch, 18. März 2020, 12:15–12:30, TRE Ma
Rotation and translation of molecular motors on a metallic surface — •Monika Schied1, Peter Jacobson1, Dongdong Liu2, James M. Tour2, and Leonhard Grill1 — 1Department of Physical Chemistry, University of Graz, Austria — 2Department of Chemistry, Rice University, USA
Artificial molecular motors that convert an external energy input into controlled motion have seen great developments in the last decades [1]. While many studies exist in solution, little is known how such functional molecules behave on a surface. Molecules on surfaces have the advantage of a fixed point of reference and confinement in two dimensions making it easier to study the directionality of their motion.
The uni-directional rotation of the motors investigated in this study is based on a combination of double bond isomerisation and helix inversion. This so-called Feringa motor has already been implemented into molecular structures to enable or enhance their lateral translation on metal surfaces [2, 3].
Here, we image and manipulate single motor molecules on metallic surfaces by low-temperature scanning tunnelling microscopy (STM). Rotational and translational movements as well as changes in appearance are observed after voltage pulses with the STM tip.
[1] W. R. Browne and B. L. Feringa, Nat. Nanotech. 1, 25 (2006)
[2] T. Kudernac et al., Nature 479, 208 (2011)
[3] A. Saywell et al., ACS Nano 10, 10945 (2016)