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Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 63: Focus Session: Functional Molecules at Surfaces III

O 63.4: Vortrag

Mittwoch, 18. März 2020, 11:30–11:45, TRE Ma

LT-STM investigation of transmitting rotation between molecular gears on Au(111) — •Kwan Ho Au Yeung1,2, Tim Kühne1,2, Frank Eisenhut1,2, Michael Kleinwächter3, Yohan Gisbert3, Gianaurelio Cuniberti2, Claire Kammerer3, Gwénaël Rapenne3, and Francesca Moresco11Center for Advancing Electronics Dresden, TU Dresden, Germany — 2Institute of Materials Science, TU Dresden, Germany — 3CEMES, Université de Toulouse, CNRS, Toulouse, France

Molecular gear is an essential and elementary component for the construction of planar single-molecule mechanical machines, in which a refined design of molecules, a smart selected surface for anchoring, and a highly controllable rotation are desired. The family of pentaphenylcyclopentadiene (PPCP) molecules shows not only the appearance of macroscopic gears, but also the behavior of transmitting rotation from molecule to molecule. Under the investigation of LT-STM on the Au (111) surface, step-by-step, controlled, and transmitting rotations have been examined by lateral manipulation. Further, in order to achieve concentric rotations, and hence, the anchoring properties of molecules, the pristine and radical states of the molecules after tip-induced cleaving at the cyclopentadiene core have been studied.

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