Greifswald 2024 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 6: Poster I
P 6.15: Poster
Montag, 26. Februar 2024, 16:30–18:30, ELP 6: Foyer
Characterization of millimeter-sized low-pressure plasmas in multi-scale aeromaterials — •Karin Hansen1, Julian Held2, Jonas Lumma3, Lena Marie Saure3, Fabian Schütt3, Rainer Adelung3, and Franko Greiner1 — 1Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany — 2Department of Mechanical Engineering, University of Minnesota, Minneapolis, USA — 3Institute for Materials Science, Kiel University, Kiel, Germany
Environmental protection is pivotal in our daily lives, and catalysis, particularly plasma catalysis, stands as a promising avenue to address these challenges. The efficiency of chemical processes hinges on the interplay between the plasma and catalyst surface. Nanodusty plasmas, comprising nanometer-sized particles spaced at micrometer intervals in a low-pressure plasma, exhibit notable attributes - a high surface-to-volume ratio and exceptional plasma permeability with a filling factor f≈10−5. Multi-scale aeromaterials, micron-sized tetrapodal frameworks with nano-sized walls, share a comparable filling factor. These highly porous and lightweight aeromaterials remain solid and deployable within a plasma environment.
Our investigation centers on probing the interaction between these aeromaterials and low-pressure, radio-frequency argon plasmas. The plasma is ignited in a system of millimeter-sized aeromaterial cylinders with cylindrical cavities, providing a large aeromaterial-surface to plasma-volume ratio. Optical emission spectroscopy and electrostatic double probes as key techniques have been tailored to this millimeter-sized system. Our preliminary studies focus on aeroglass (t-SiO2).
Keywords: double probes; optical emission spectroscopy; multi-scale aeromaterial; plasma-surface interaction