Processes in Atmospheric-Pressure Plasmas—2nd Edition

A special issue of Plasma (ISSN 2571-6182).

Deadline for manuscript submissions: 31 March 2026 | Viewed by 615

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Relyon Plasma GmbH, 93055 Regensburg, Germany
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Dear Colleagues,

Different types of atmospheric-pressure plasma are applied not only in classical fields, such as material research, diagnostics, or industrial production, but are also applied in relation to novel approaches in food and seed science, as well as in medicine, in applications including wound healing, dentistry, sterilization, and odor control, among many others. The most frequently used methods for atmospheric-pressure plasma generation include the following:

  • Different atmospheric-pressure plasma jets based on kHz DBD, radio frequency, microwaves, and pulsed arcs, operated with different gases.
  • Dielectric-barrier discharges, including surface-barrier discharges, coplanar surface-barrier discharges, and atmospheric-pressure glow operated with noble gases or their mixtures with oxygen or hydrogen.
  • Piezoelectric direct discharge used both in ambient air and in wall-specified gas mixtures of nitrogen, oxygen, synthetic air, or compressed dried air.
  • Corona discharges, especially positive pulsed corona.

Recent research has focused on the interaction of plasma with liquids or humid environments, including the production of plasma-activated water (PAW) or plasma-activated liquids in general. Despite progress in this area, the mechanisms of interaction of different types of plasma with humidity, liquids, and materials are not fully understood in all cases. Many physical and chemical processes that are crucial for successful implementation require better explanations, modeling, predictions, and clarifications. This Special Issue of Plasma presents an opportunity for both scholars and researchers from various national and international institutions to present their progress in these fields. You are welcome to submit your original papers for peer review. The publications in the first volume, which we believe may be of interest to you, can be found here: https://www.mdpi.com/journal/plasma/special_issues/V8VKI3THK3.

Dr. Dariusz Z. Korzec
Guest Editor

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Keywords

  • atmospheric-pressure plasma
  • cold atmospheric plasma
  • atmospheric-pressure plasma jet (APPJ)
  • dielectric barrier discharge (DBD)
  • pulsed corona
  • ozone
  • nitrogen oxides
  • peroxide
  • humidity
  • plasma-activated water (PAW)

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28 pages, 8047 KiB  
Article
Hybrid Dielectric Barrier Discharge Reactor: Production of Reactive Oxygen–Nitrogen Species in Humid Air
by Dariusz Korzec, Florian Freund, Christian Bäuml, Patrik Penzkofer, Oliver Beier, Andreas Pfuch, Klaus Vogelsang, Frank Froehlich and Stefan Nettesheim
Plasma 2025, 8(3), 27; https://doi.org/10.3390/plasma8030027 - 6 Jul 2025
Viewed by 525
Abstract
Reactive oxygen–nitrogen species (RONS) production in a Peltier-cooled hybrid dielectric barrier discharge (HDBD) reactor operated with humid air is characterized. Fourier-transform infrared spectroscopy (FTIR) is used to determine the RONS in the HDBD-produced gases. The presence of molecules O3, NO2 [...] Read more.
Reactive oxygen–nitrogen species (RONS) production in a Peltier-cooled hybrid dielectric barrier discharge (HDBD) reactor operated with humid air is characterized. Fourier-transform infrared spectroscopy (FTIR) is used to determine the RONS in the HDBD-produced gases. The presence of molecules O3, NO2, N2O, N2O5, and HNO3 is evaluated. The influence of HDBD reactor operation parameters on the FTIR result is discussed. The strongest influence of Peltier cooling on RONS chemistry is reached at conditions related to a high specific energy input (SEI): high voltage and duty cycle of plasma width modulation (PWM), and low gas flow. Both PWM and Peltier cooling can achieve a change in the chemistry from oxygen-based to nitrogen-based. N2O5 and HNO3 are detected at a low humidity of 7% in the reactor input air but not at humidity exceeding 90%. In addition to the FTIR analysis, the plasma-activated water (PAW) is investigated. PAW is produced by bubbling the HDBD plasma gas through 12.5 mL of distilled water in a closed-loop circulation at a high SEI. Despite the absence of N2O5 and HNO3 in the gas phase, the acidity of the PAW is increased. The pH value decreases on average by 0.12 per minute. Full article
(This article belongs to the Special Issue Processes in Atmospheric-Pressure Plasmas—2nd Edition)
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