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P: Fachverband Plasmaphysik

P 9: Poster I

P 9.48: Poster

Tuesday, March 29, 2022, 16:00–17:30, P

Atomic oxygen distribution in the interaction zone of a micro atmospheric pressure plasma jet and a surface — •Sascha Chur¹, David Steuer¹, Volker Schulz-von der Gathen¹, Marc Böke¹, and Judith Golda² — ¹EP2 chair Physics, Ruhr University Bochum, Germany — ²Plasma Interface Physics, Ruhr University Bochum, Germany

The efficiency of catalysts is strongly dependent on the characteristics of the used catalytic surface. Key features are the morphology and nanostructure of the surfaces and its chemical composition. The combination of reactive species provided by a micro-scaled atmospheric pressure plasma jet, electric fields and energy input by laser irradiation can lead to very effective functionalisation and structuring of surfaces via complex laser-plasma-surface interactions. Here, we investigate the distribution of atomic oxygen (O) along treated substrates by means of two-dimensional two photon absorption laser induced fluorescence spectroscopy (TALIF) utilizing a red enhanced ICCD camera. The measurements were performed in the emerging gas beam of a micro atmospheric pressure plasma jet operated with a He/O admixture in the interaction zone of a metallic (Cu) surface. The O density (~10^16 m^-3) forms a maximum in front of the surface. Furthermore it could be shown that the size of the observed volume by the detector systems influences results like density or lifetime significantly. Supported by DFG within SFB1316 (TP B2)