Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 54: Nanostructured surfaces and thin films
O 54.7: Vortrag
Mittwoch, 11. März 2026, 12:00–12:15, HSZ/0201
Self-assembly of linear three-ring aromatic thiols on Au(111) and their conversion into 2D molecular materials — •Verena Müller1, Anna-Laurine Gaus2, Daniel Hüger1, Julian Picker1, Christof Neumann1, Max von Delius2, and Andrey Turchanin1 — 1Friedrich Schiller University Jena, Institute of Physical Chemistry, Lessingstrasse 10, 07743 Jena, Germany — 2Ulm University, Institute of Organic Chemistry, Albert Einstein Allee 11, 89081 Ulm, Germany
Self-assembled monolayers (SAMs) allow surface modification at the molecular level and moreover have the ability of crosslinking with low-energy electrons to form mechanically stable and transferable 2D materials, so-called carbon nanomembranes (CNMs).
We investigate the self-assembly of linear, three-ring aromatic thiols on Au(111) and their subsequent electron-induced conversion into carbon nanomembranes (CNMs). Our study examines terphenylthiol (TPT) derivatives with distinct terminal groups (-F, -CF3, -NO2) as well as a pyridinebiphenyl compound. Utilizing complementary surface science techniques - X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction (LEED), and scanning tunneling microscopy (STM) - we elucidate the structural properties of the resulting self-assembled monolayers (SAMs) and investigate their transformation into CNMs. The resulting CNMs exhibit tunable gas permeation characteristics, governed by the chemistry of the precursor molecules and the SAM structure.
Keywords: Self-assembled monolayer (SAM); Carbon nanomembrane (CNM); Low-energy electron diffraction (LEED); Scanning tunneling microscopy (STM); X-ray photoelectron spectroscopy (XPS)