Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Volume 67, Number 9
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session EF1: Plasma Medical & Agricultural Application I
8:00 AM–9:30 AM,
Friday, October 7, 2022
Sendai International Center
Room: Hagi
Chair: Kazunori Koga, Kyushu University
Abstract: EF1.00004 : Characterization of Novel Flexible Surface Dielectric Barrier Discharge Electrodes for the Purpose of In-Package Microbe Deactivation on the Surface of Fresh Produce*
9:00 AM–9:15 AM
Presenter:
Duncan P Trosan
(North Carolina State University)
Authors:
Duncan P Trosan
(North Carolina State University)
Patrick D Walther
(North Carolina State University)
Qingyang Wang
(North Carolina State University)
Stephen D Mclaughlin
(Rutgers University)
Aaron Mazzeo
(Rutgers University)
Deepti Salvi
(North Carolina State University)
Katharina Stapelmann
(North Carolina State University)
Surface dielectric barrier discharges have been gaining interest due to applications in flow control, plasma medicine, and food processing. A low-cost flexible electrode has been developed which allows in-package plasma treatment of fresh produce.[1] Plasma treatment was shown to deactivate microbes both in vitro and on the surface of cut white mushrooms. The operation parameters of these electrodes were also extensively analyzed. Voltage and current measurements were performed and an adapted SDBD circuit model was used to determine plasma power, dielectric capacitance, and plasma resistance. The capacitance of the on-cycle measurements increases linearly with applied voltage and plasma resistance decreases with increasing voltage. Different electrode geometries were used and it was found that the plasma power increases linearly with respect to plasma perimeter. Optical emission spectroscopy was used to determine the reduced electric field using a collisional radiative model [2]. The reduced electric field was determined to be constant with increasing voltage but varied based on electrode geometry. Finally, ICCD imaging was used to visualize the plasma extent within the positive and negative halfwave of the discharge.
[1] A. D. Mazzeo et al., Proceedings of the National Academy of Sciences 14 (2019)
[2] Kogelheide et al. Plasma Processes and Polymers, 2019.
*United States Department of Agriculture, National Institute of Food and Agriculture, Agriculture and Food Research Initiative (USDA NIFA AFRI). September 2020Award # 2020-67017-31260
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