Reproducibility of ‘COST reference microplasma jets’

Abstract

Atmospheric pressure plasmas have been ground-breaking for plasma science and technologies, due to their significant application potential in many fields, including medicinal, biological, and environmental applications. This is predominantly due to their efficient production and delivery of chemically reactive species under ambient conditions. One of the challenges in progressing the field is comparing plasma sources and results across the community and the literature. To address this a reference plasma source was established during the ‘biomedical applications of atmospheric pressure plasmas’ EU COST Action MP1101. It is crucial that reference sources are reproducible. Here, we present the reproducibility and variance across multiple sources through examining various characteristics, including: absolute atomic oxygen densities, absolute ozone densities, electrical characteristics, optical emission spectroscopy, temperature measurements, and bactericidal activity. The measurements demonstrate that the tested COST jets are mainly reproducible within the intrinsic uncertainty of each measurement technique.

2D spatially resolved O atom density profiles in an atmospheric pressure plasma jet: from the active plasma volume to the effluent

“…Classical µAPPJs are operated at a single radio frequency of 13.56 MHz. A reference source for the generation of reactive species is the COST micro plasma jet [5,32]. It was developed within the European Cooperation for Science and Technology (COST) action MP1101 'Biomedical Applications of Atmospheric Pressure Plasmas' and is used by various working groups worldwide to ensure the comparability of research results.…”

Multi-diagnostic approach to energy transport in an atmospheric pressure helium-oxygen plasma jet

“…Overall, the uncertainty of the rotational temperature seems to be underestimated by the fit. The temperatures at low input powers are slightly higher than in the COST-Jet, which is most likely due to the increased length of the plasma channel and therefore the longer residence time of the gas in the plasma [31,32].…”

Plasma‐driven biocatalysis: In situ hydrogen peroxide production with an atmospheric pressure plasma jet increases the performance of OleTJE when compared to adding the same molar amount of hydrogen peroxide in bolus

“…[30,35,36] To limit the effect of impurities in the discharge, gas delivery was regulated via stainless steel tubing. As a reference jet, the COST-Jet is well studied and previous research has reported its reproducibility, [37] gas-phase densities of reactive species, [34,36,38,39] and liquid phase densities, [30,35,[40][41][42] among others. The nozzle of the COST-Jet was placed 4 mm above the liquid surface, see Figure 1.…”