Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 15: Metal Substrates II: Adsorption and Reactivity

O 15.2: Vortrag

Montag, 1. April 2019, 15:15–15:30, Kunsthalle

Inducing the Controlled Rotation of Single o-MeO-DMBI Molecules Anchored to Au(111) — •Frank Eisenhut1,2, Jörg Meyer1,2, Tim Kühne1,2, Jorge Monsalve1,2, Justus Krüger1,2, Robin Ohmann1,2, Gianaurelio Cuniberti1,2,3, and Francesca Moresco1,21Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany — 2Institute for Materials Science, TU Dresden, 01062 Dresden, Germany — 3Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany

A key step towards building single molecule machines is to control the rotation of molecules and nanostructures step by step on a surface. Here, we used the tunneling electrons coming from the tip of a scanning tunneling microscope to achieve the controlled directed rotation of complex o-MeO-DMBI molecules. We studied the adsorption of single o-MeO-DMBI molecules on Au(111) by scanning tunneling microscopy at low temperature and observed by lateral manipulation experiments that the molecules chemisorb on the surface and are anchored on Au(111) with an oxygen-gold bond via their methoxy group. Driven by inelastic tunneling electrons, o-MeO-DMBI molecules can controllably rotate, stepwise and unidirectional, either clockwise or counterclockwise depending on their enantiomeric form. Furthermore, we investigated the temperature-induced rotation of the molecules.

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