Investigation on Atmospheric Pressure Plasma Jet of DBD and its Application on Bacteria Inactivation

Abstract:

Two kinds of multiple-pulse were reported on atmospheric plasma jet (APPJ) of dielectric barrier discharge (DBD) configurations in this study. Meanwhile, the investigation on electrical characteristics of APPJ in helium and helium/air was carried out with the aim of shedding light on the electrode parameters for dissipated power and jet length. The typical bacteria, E. coil, were employed to study the effect by the two APPJ devices (PJ-1 and PJ-2). For PJ-1, multiple-pulse appears in both sides of every half-cycle, but only in the positive half-cycle for PJ-2. A wider power electrode of PJ-1 and further distance from the nozzle to grounding electrode of PJ-2, whether in ambient helium or helium/air, are all conducive to improvement of dissipated power. With the increase of gas flow rate, the jet length will become longer at laminar flow mode, then get shorter, and a permanent to the end. Generally, the introduction of air leads a better sterilization effect, especially for PJ-1. Keywords: Atmospheric Pressure, multiple-pulse, Electrode parameters, dissipated power, jet length, plasma jet. PACS: 52.80.-s, 52.77.-j

• Periodical: Applied Mechanics and Materials (Volumes 719-720)
• Pages: 221-230
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.719-720.221
• Online since: January 2015
• Authors: Tao Liang*, Shi Ying Hou
• Keywords: Atmospheric Pressure, Dissipated Power, Electrode Parameters, Jet Length, Multiple-Pulse, Plasma Jet

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