Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 38: Poster 2D Materials: Stacking and Heterostructures (joint session O/HL)

O 38.2: Poster

Tuesday, March 18, 2025, 13:30–15:30, P3

In-depth analysis of stratified MoS2 and WS2 2D heterostructures — •Sebastian Klenk, Nikolas Dominik, Cormac Ó Coileáin, Tanja Stimpel-Lindner, and Georg S. Duesberg — University of the Bundeswehr Munich, Institute of Physics, Germany

Starting with graphene roughly two decades ago, two-dimensional (2D) materials have garnered great interest in the scientific community due to their exceptional electrical, mechanical and optical properties. The broad palette of different 2D materials has allowed for the possibility to change and finetune these parameters to one's own liking by combining several 2D materials in one film. Here, we present the metal-organic chemical vapour deposition (MOCVD) synthesis and analysis of MoS2/WS2 heterostructures. We show the ordering of a high-quality 7-layer combination structure of less than 10 nm. The layered nature is confirmed and discussed using XPS, EDX, ToF-SIMS, TEM, AFM and Raman spectroscopy.

Keywords: 2D Material; MoS2; WS2; Heterostructure; Growth