Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 17: Poster Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation
O 17.2: Poster
Montag, 17. März 2025, 18:00–20:00, P2
Experimental benchmark for configuration monitoring during scanning-probe-microscope manipulation — •Mong-Wen Gu1, Jonas Lederer2, Joshua Scheidt1,2, Hadi H. Arefi1, Kristof T. Schütt2, Michael Gastegger2, F. Stefan Tautz1, Klaus-Robert Müller2, and Christian Wagner1 — 1Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, Jülich, Germany — 2Machine Learning Group, Technische Universität Berlin, Berlin, Germany
The scanning probe microscope (SPM) allows nano-objects to be manipulated with single-molecule precision. A critical challenge of this SPM-based technique is to simultaneously manipulate molecules and monitor their configuration. Here, an experimental protocol is developed and evaluated that predicts the molecular configuration based on the physical observables continuously acquired by the SPM. A PTCDA (3,4,9,10-perylene tetracarboxylic dianhydride) molecule on the Ag(111) surface is manipulated to move along a predefined tip trajectory. The measured observables (force gradient) are compared with the results of a DFT trained machine learning model. This work paves the way for the fabrication of a wide variety of nanostructures.
Keywords: molecular manipulation; scanning probe microscopy