Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 70: 2D materials: Stacking and heterostructures – Poster (joint session O/TT)

O 70.5: Poster

Mittwoch, 11. März 2026, 18:00–20:00, P2

Ordering Phenomena in MoS₂ Nanocrystals on Graphite — •Lukas Nöding¹, Ahmed Hassanien¹, Mashood Tariq Mir¹, Hanna Shirin Pulikkal Hamza¹, Seyedeh Helya Alaei¹, Thomas Baumert¹, Jochen Mikosch¹, Florian Graßme², Claudia Backes², and Arne Senftleben¹ — ¹University of Kassel, Institute of Physics, Kassel, Germany — ²University of Kassel, Institute of Chemistry, Kassel, Germany

Two-dimensional transition-metal dichalcogenides (TMDCs) such as MoS₂ offer a platform for tailoring electronic and optical properties through controlled stacking and orientation. Achieving ordered assemblies of MoS₂ nanocrystals on crystalline substrates is, therefore, of considerable interest. In this work, we study the crystallographic alignment of MoS₂ nanocrystals on a graphite substrate. The samples were prepared using the Langmuir-Schäfer technique, enabling the reproducible deposition of nanocrystals with controlled density. To probe the crystallographic alignment of the deposited nanocrystals with respect to the graphite lattice, we performed wide field static electron diffraction measurements at an acceleration voltage of 35 kV, complemented by selected area electron diffraction at 200 kV.

Our preliminary analysis reveals a pronounced localized and short-range ordered crystallographic alignment of the MoS₂ nanocrystals, extending over at least a few micrometers. A quantitative evaluation of the global ordering behavior, as well as its dependence on crystal size and deposition parameters, is currently underway and will be discussed.

Keywords: Nanocrystals; MoS2; Alignment; Electron diffraction