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 75.7: Poster
Mittwoch, 3. März 2021, 13:30–15:30, P
Uni-directional rotation of molecular motors on Cu(111) — •Monika Schied1, Deborah Prezzi2, Dongdong Liu3, Peter Jacobson1, Elisa Molinari2, James M. Tour3, and Leonhard Grill1 — 1Department of Physical Chemistry, University of Graz, Austria — 2Nanoscience Institute of CNR, S3 Center, Modena, Italy — 3Department of Chemistry, Rice University, USA
Artificial molecular motors that convert external energy 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. However, such a solid support can be advantageous as it offers fixed points of reference as well as confinement in two dimensions, making it easier to study the directionality of their motion.
We have studied single molecules with a so-called Feringa motor [2,3] on a Cu(111) surface by low-temperature scanning tunnelling microscopy (STM). It was found that rotations of individual molecules can be induced over rather long distances by voltage pulses with the STM tip. Importantly, these rotations show high directionality (clockwise or anticlockwise), which will be discussed in view of their specific chemical structure and adsorption.
[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)