Bochum 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
P: Fachverband Plasmaphysik
P 5: Poster Session - Low Temperature Plasmas
P 5.1: Poster
Montag, 2. März 2015, 16:30–18:30, Foyer Audimax
Antibacterial Copper Coating on Temperature Labile Surfaces with an Air-operated DC Plasma Jet — •Jana Kredl1, Steffen Drache2, Juergen Müller1, Rainer Hippler2, Maik Fröhlich1, and Juergen Kolb1 — 1Leibniz-Institute for Plasma Science and Technology (INP Greifswald e.V.) — 2Institute of Physics, Ernst-Moritz-Arndt University Greifswald, 17489 Greifswald
Surfaces can be easily coated, activated or etched with plasmas. But conventional approaches that are utilizing low pressure plasmas cannot be applied towards materials with low melting point. To coat temperature labile materials (e.g. acrylic glass or PVC) the plasma must be cold, i.e. plasma temperature should be close to room temperature. We developed a system for the generation of a 'cold' plasma in a micro hollow cathode geometry that is operated with air. With this geometry a plasma jet is created when applying a dc high voltage of about 2 kV and a current of about 30 mA and a gas flow rate of 8 sLm. The expelled afterglow plasma approaches room temperature within a few millimeters from the orifice of the jet. The jet was used to deposit copper on acrylnitrile-butadiene-styrol (ABS). First studies show a linear dependency of the copper deposition rate on the energy that is dissipated in the plasma. The coatings have demonstrated an antibacterial effect which depends on the amount of copper deposited per area. A reduction of about 95% for the growth of Staphylococcus aureus was achieved accordingly.