Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 29: Metal substrates 1
O 29.5: Vortrag
Dienstag, 6. September 2022, 11:30–11:45, S052
LT-STM induced reversible chiral switching of thiophene-based molecule on Au(111) — •Suchetana Sarkar1,2, Kwan Ho Au-Yeung1,2, Tim Kuehne1,2, Dmitry A. Ryndyk2,3, Albrecht Waentig1,4, Xinliang Feng1,4, and Francesca Moresco1,2 — 1Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany — 2Institute for Materials Science, TU Dresden, 01062 Dresden, Germany — 3Theoretical Chemistry, TU Dresden, 01062 Dresden, Germany — 4Chair of Molecular Functional Materials and Faculty of Chemistry & Food Chemistry, TU Dresden, 01062 Dresden, Germany
In the ongoing quest for miniaturization of machines, single molecule machinery holds a plethora of possibilities. Advancements in nanoscale imaging techniques, such as Scanning Tunneling Microscopy and Spectroscopy(STM, STS), allows not only the addressing of single molecules individually but through tunneling electrons/electric field stimulation with an STM tip, one can experimentally study fundamental properties of molecules such as pi-conjugation and charge transfer to a surface, and the effect it has on the switching behavior. We present the design and synthesis of a nanoswitch which exhibits a reversible switching from achiral to chiral mode on Au(111). The electronic states of both conformations have been measured with a high degree of spatial resolution, thereby showing the pathways of the electron-induced isomerization. Furthermore, we demonstrate this effect being suppressed on Ag(111).