Erlangen 2026 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 9: Low Pressure Plasmas III

P 9.2: Vortrag

Mittwoch, 18. März 2026, 11:30–11:45, KH 01.020

Metal-coated plastic spheres in dusty plasmas as active particles — •Andre Melzer, Tobias Marder, Stefan Schütt, Horst-Holger Boltz, Thomas Ihle, Christina Knapek, Daniel Maier, and Daniel Mohr — Institute of Physics, University of Greifswald, Greifswald, Germany

The dynamical properties of metal-coated dust microspheres confined in a gaseous plasma environment have been studied. It has been observed that such particles feature properties of active particles and that the particle activity changes over time and increases with the intensity of laser illumination. The dynamics of single particles as well as of small particle clusters have been analyzed quantitatively with various statistical methods to characterize their activity. Furthermore, clusters of metal-coated microspheres are observed to undergo a phase transition from an ordered to an unordered structure under increased laser illumination intensity due to the increased active motion of the particles.

Keywords: active matter; particle trajectories; non-Gaussian statistics