Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 16: 2D Materials beyond graphene: Growth, structure and substrate interaction (joint session O/HL/TT)
TT 16.7: Vortrag
Montag, 9. März 2026, 16:30–16:45, HSZ/0204
CVD growth and characterization of WSe2 monolayers on Au(111) and their conversion to Janus SeWS — •Julian Picker1, Jonas Brandhoff2, Maximilian Schaal2, Felix Otto2, Christof Neumann1, Torsten Fritz2, and Andrey Turchanin1 — 1Institute of Physical Chemistry, Friedrich Schiller University Jena, Germany — 2Institute of Solid State Physics, Friedrich Schiller University Jena, Germany
Transition metal dichalcogenides (TMDs) exhibit distinctive optical and electronic properties in the two-dimensional monolayer limit. Recently, Janus TMDs have attracted significant attention because their asymmetric chalcogen composition breaks the out-of-plane symmetry and enables properties not attainable in conventional TMDs. In this work, we initially investigate the structural and electronic characteristics of WSe2 monolayers grown on Au(111) via ambient-pressure chemical vapor deposition (CVD). Surface-sensitive techniques - including scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS), and angle-resolved photoelectron spectroscopy (ARPES) - were employed to characterize the properties of these monolayers. Subsequently, the WSe2 monolayers were transformed into Janus SeWS monolayers through selective chalcogen replacement at the WSe2/Au interface. A comparative analysis reveals the structural and electronic differences between the two systems.
Keywords: TMDs; 2D materials; STM; ARPES; CVD