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P: Fachverband Plasmaphysik
P 19: Poster II
P 19.34: Poster
Thursday, March 31, 2022, 16:00–17:30, P
Studies on the plasma permeability of porous materials using polymers as marker materials — •Martin Leander Marxen1, Luka Hansen1, Armin Reimers2, Fabian Schütt2, Lena Marie Saure2, Erik Greve2, Rainer Adelung2, and Holger Kersten1 — 1Institute for Experimental and Applied Physics, CAU Kiel — 2Institute for Material Science, CAU Kiel
Highly porous materials are of large interest due to their broad potential for application, e. g. as sensors or catalysts making use of their extremly high surface areas. The plasma permeability of highly porous framework materials produced from tetrapodal zinc oxide (t-ZnO) in a low pressure capacitively coupled plasma was studied with a new, indirect approach. The t-ZnO materials have a porosity > 90 %. Furthermore, some of the samples have additional nanomaterial surface layers (e. g. graphene) deposited on the t-ZnO arms, resulting in a change of conductivity. A polymer (EPDM) was covered with the material of interest and then exposed to an oxygen plasma. The covering material was removed afterwards and the surface of the EPDM was investigated by water contact angle measurement and XPS. Changes of the surface can be attributed to plasma species that permeated the covering zinc oxide material and reached the surface. This approach offers an easy and affordable opportunity to get insight in how deep plasma can penetrate into highly porous structures with nano- and microscale features.