Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 14: 2D Materials Beyond Graphene: Growth, Structure and Substrate Interaction (joint session O/HL)
O 14.4: Talk
Monday, March 17, 2025, 15:45–16:00, H11
Spectroscopic and microscopic study of (car)borane based 2D materials — •Martha Frey1, Julian Picker1, Jakub Visnak2, Christof Neumann1, Tomas Base2, and Andrey Turchanin1 — 1Friedrich 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
Boranes are electron-delocalized molecular clusters containing boron and hydrogen. Their electron-deficient bonding and structural diversity as well as their high thermal stability make them attractive for applications ranging from optoelectronics to energy storage. Here we present the fabrication of a novel boron-based, carbon free two-dimensional (2D) material via electron-induced crosslinking of borane-based self-assembled monolayers (SAMs) on silver substrates. The SAMs, crosslinking process and resulting nanomembranes were analyzed using complementary surface-sensitive techniques including X-ray and ultraviolet photoelectron spectroscopy (XPS, UPS), low-energy electron diffraction (LEED) and scanning tunneling and electron microscopies (STM, SEM). Furthermore, the results were compared with carborane-based 2D nanomaterials studied previously in our labs. The results demonstrate that properties of the 2D (car)borane nanosheets can be adjusted and tailored by the respective SAM constituents and that these structurally diverse cluster molecules open up new avenues for engineering novel functional 2D materials.
Keywords: molecular self-assembly; nanomembranes; monolayers; scanning tunneling microscopy