Regensburg 2025 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 21: Poster Heterogeneous Catalysis

O 21.4: Poster

Montag, 17. März 2025, 18:00–20:00, P2

Size-selected metal nanoparticles on tungsten: influence of the deposition angle — •Sumanasa Begur Prakash and Mathias Getzlaff — Institute of Applied Physics, University of Düsseldorf

Metal nanoclusters and nanoparticles, especially those composed of iron (Fe), nickel (Ni), and their alloys, are fascinating due to their unique electronic and magnetic properties which vary significantly with particle size. This feature makes them not only interesting for fundamental research but also highly promising for advanced technologies including catalysis, magnetic storage, and sensing. However, interaction with the substrate during and after deposition significantly influences the particle's properties.

Our contribution is focused on size-selected Fe, Ni, and Fe-Ni alloy nanoparticles which are deposited on a W (110) substrate. Using a magnetron sputter source (Haberland-type) we vary the deposition angle to understand how this parameter influences the particle size, structure, and overall distribution of nanoparticles on the substrate surface. This approach allows us to probe the relationship between deposition conditions and particle characteristics. The size and structural properties are investigated by scanning tunneling microscopy (STM) and low energy electron diffraction (LEED) under ultra-high vacuum (UHV) conditions.

Keywords: Nanoparticles; size-selection; adsorption; angle dependence