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P: Fachverband Plasmaphysik

P 7: Atmospheric Pressure Plasmas and their Applications III

P 7.2: Vortrag

Dienstag, 21. März 2023, 17:15–17:30, CHE/0089

A comparison of the spatial distribution of H₂O₂ in the effluent of the kINPen-Sci and the COST Reference Microplasma Jet — •Levin Krös¹, Ben Harris², Andy Nave¹, Erik Wagenaars², and Jean-Pierre van Helden¹ — ¹Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany — ²York Plasma Institute, Department of Physics, University of York, UK

Cold atmospheric plasma jets (CAPJs) are utilised in biomedical applications, as they provide important reactive oxygen and nitrogen species (RONS) for the plasma cell interaction, such as H₂O₂. There are still open questions in the physical and chemical field regarding the production of the RONS. Where are they formed and how does the jet-type has an influence on their production? As a first step to resolve that question, the production of H₂O₂ in humidified helium is compared between the kINPen-Sci and the COST Reference Microplasma Jet. The small sample length (about 4 mm) combined with low number densities are a challenge for established absorption spectroscopic techniques. Continuous-wave cavity ring-down spectroscopy (cw-CRDS) is applied in order to increase the path length through the sample. The difference in the spatial distribution of H₂O₂ in the effluent between the jets will be discussed.