SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 47: 2D Materials II: Growth, Structure and Substrate Interaction I

O 47.8: Vortrag

Mittwoch, 29. März 2023, 12:15–12:30, GER 37

Preparation and characterization of carborane based nanomembranes — •Martha Frey1, Julian Picker1, Jakub Višňáḱ2, Christof Neumann1, Tomáš Baše2, and Andrey Turchanin11Friedrich Schiller University Jena, Institute of Physical Chemistry, Lessingstraße 10, 07743 Jena, Germany — 2The Czech Academy of Sciences, Institute of Inorganic Chemistry, 250 68 Husinec-Rez, c.p. 1001, Czech Republic

Carboranes are electron-delocalized molecular clusters containing boron, carbon, and hydrogen. Because of their high chemical and thermal stability as well as their structural variability, they are interesting for a wide range of applications including nanoscale engineering, catalysis, and boron neutron capture therapy. Here, we present the fabrication of a novel boron-based two-dimensional (2D) material via electron irradiation induced cross-linking of carborane self-assembled monolayers (SAMs) on silver substrates. Using the double-cage molecule 1,2-dicarba-closo-dodecaborane-9,12-dithiol, the fabrication of a mechanically stable and continuous ∼1 nm thin membrane was achieved. The self-assembly, cross-linking and transfer of the resulting nanomembranes onto grids have been characterized with different complementary surface-sensitive techniques including X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction (LEED), ultraviolet photoelectron spectroscopy (UPS) and scanning electron microscopy (SEM).

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