SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 5: Poster Session I: Metal substrates I
O 5.7: Poster
Montag, 1. März 2021, 10:30–12:30, P
LT-STM investigation of transmitting rotation between molecule-gears on Au(111) — •Kwan Ho Au Yeung1,2, Tim Kühne1,2, Frank Eisenhut1,2, Michael Kleinwächter3, Yohan Gisbert3, Roberto Robles4, Nicolas Lorente4,5, Gianaurelio Cuniberti2, Christian Joachim3, Gwénaël Rapenne3,6, Claire Kammerer3, and Francesca Moresco1 — 1Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany — 2Institute for Materials Science, TU Dresden, 01062 Dresden, Germany — 3CEMES, Université de Toulouse, CNRS, 31055 Toulouse, France — 4Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), 20018 Donostia-San Sebastián, Spain — 5Donostia International Physics center, 20018 Donostia-San Sebastian, Spain — 6Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
The realization of a train of molecule-gears working under the tip of a scanning tunneling microscope (STM) requires a stable anchor of each molecule to the surface. Such anchor can be promoted by a radical state of the molecule induced by a dissociation reaction. Our results reveal that such open radical state at the core of star-shaped pentaphenylcyclopentadiene (PPCP) favors the anchoring. Furthermore, to allow the transmission of motion by manipulation, in our case, a tert-butyl group positioned at one tooth end of the gear benefits both the tip-induced manipulation and the monitoring of rotation. With this optimized molecular system, we achieve reproducible rotations of the single gears and transmit rotations up to three interlocked units.