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Open AccessArticle

Tailoring the Chemistry of Plasma-Activated Water Using a DC-Pulse-Driven Non-Thermal Atmospheric-Pressure Helium Plasma Jet

1
Department of Physical Electronics and Informatics, Osaka City University, Osaka 558-8585, Japan
2
BioMedical Engineering Center (BMEC), Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan
3
Future Industries Institute, University of South Australia, Adelaide, SA 5095, Australia
4
Department of Electronic and Photonic Systems Engineering, Kochi University of Technology, Kami, Kochi 782-8502, Japan
5
Center for Nanotechnology, Research Institute of Kochi University of Technology, Kami, Kochi 782-8502, Japan
6
Department of Electrical and Electronic Engineering, Meijo University, Nagoya 468-8502, Japan
*
Author to whom correspondence should be addressed.
Plasma 2019, 2(2), 127-137; https://doi.org/10.3390/plasma2020010
Received: 29 January 2019 / Revised: 17 April 2019 / Accepted: 17 April 2019 / Published: 23 April 2019
(This article belongs to the Special Issue Latest Developments in Pulsed Low-Temperature Plasmas)
We investigate the use of a DC-pulse-driven non-thermal atmospheric-pressure He plasma jet in the regulation of hydrogen peroxide (H2O2), nitrite (NO2), nitrate (NO3), and oxygen (O2) in deionized (DI) water. The production of these molecules is measured by in situ UV absorption spectroscopy of the plasma-activated water (PAW). Variations in the pulse polarity and pulse width have a significant influence on the resultant PAW chemistry. However, the trends in the concentrations of H2O2, NO2, NO3, and O2 are variable, pointing to the possibility that changes in the pulse polarity and pulse width might influence other plasma variables that also impact on the PAW chemistry. Overall, the results presented in this study highlight the possibility of using DC-pulse-driven plasma jets to tailor the chemistry of PAW, which opens new opportunities for the future development of optimal PAW formulations across diverse applications ranging from agriculture to medicine. View Full-Text
Keywords: atmospheric-pressure plasma jet; dc-pulse; in situ UV absorption spectroscopy; plasma-activated water (PAW); reactive oxygen and nitrogen species (RONS) atmospheric-pressure plasma jet; dc-pulse; in situ UV absorption spectroscopy; plasma-activated water (PAW); reactive oxygen and nitrogen species (RONS)
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Oh, J.-S.; Szili, E.J.; Hatta, A.; Ito, M.; Shirafuji, T. Tailoring the Chemistry of Plasma-Activated Water Using a DC-Pulse-Driven Non-Thermal Atmospheric-Pressure Helium Plasma Jet. Plasma 2019, 2, 127-137.

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