Greifswald 2024 – scientific programme
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P: Fachverband Plasmaphysik
P 10: Atmospheric Pressure Plasmas and their Applications II
P 10.7: Talk
Tuesday, February 27, 2024, 15:45–16:00, WW 1: HS
Novel methods for determination and manipulation of surface charges in an atmospheric DBD microplasma — •Robin Labenski1, David Steuer1, Henrik van Impel1, Marc Böke2, Volker Schulz-von der Gathen2, and Judith Golda1 — 1Plasma Interface Physics, Ruhr-University Bochum — 2Experimental Physics II, Ruhr-University Bochum
In photo- and electrocatalysis it is already well-established that surface charges can alter the chemical adsorption and reaction paths of the catalyst. However, the novel realm of plasma catalysis lacks experimental exploration regarding the impact of plasma-induced surface charges on catalysis. We pave that way by introducing a straightforward method for precisely charging the dielectric (catalyst) using a microplasma at atmospheric pressure, while also monitoring the level of deposited surface charge over time. Through pre-charging we examine its effect on re-ignition and forming of equilibria in the discharge. Additionally, a laser assisted technique is introduced to further fine-tune the amount of surface charge on the dielectric and assess the plasma's response to this subtle manipulation of surface charge.
Keywords: surface charge; microplasma; catalysis; DBD; atmospheric pressure