Twin surface dielectric barrier discharge for pulsed atmospheric plasma production using novel interfractal electrodes
L.F.A. Wymenga (TU Delft - Electronic Components, Technology and Materials)
J. van Turnhout (TU Delft - Team Arjan Mol)
M. Ghaffarian Niasar (TU Delft - High Voltage Technology Group)
H.W. van Zeijl (TU Delft - Electronic Components, Technology and Materials)
W.D. van Driel (TU Delft - Electronic Components, Technology and Materials)
Kouchi Zhang (TU Delft - Electronic Components, Technology and Materials)
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Abstract
Cold atmospheric plasma (CAP) is widely used in domains such as disinfection, surface treatment and food preservation. When generated in air, CAP is rich in reactive oxygen and nitrogen species (RONS), such as ozone (O3). A dielectric barrier discharge (DBD) is a reliable method to create CAP. We developed a double-sided (twin) surface DBD with novel ‘interfractal’ electrode geometries. This fractal configuration creates stronger electric fields than the customary interdigital line geometry. So, CAP is produced more effectively, resulting in higher RONS concentrations. The performance of interfractal electrodes was compared to that of interdigital electrodes (IDE) in atmospheric air. Nanopulsed powering was used, since it is the most efficient for powering DBDs. Electrical and chemical characteristics (such as ozone level) were assessed. The results show that interfractal electrodes enhance the electric field, conduction current and ozone yield.
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