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.
Highlights
The Cooperation for Science and Technology (COST) jet is driven with a radio frequency waveform, capacitively coupled with parallel stainless steel electrodes, sandwiched between glass panes to confine the gas flow between the electrodes
Since the electric field between the electrodes is perpendicular to the gas flow, the charged particles and electric field rapidly decay outside the core plasma, leaving the jet region devoid of charged particles and electric fields [48]
We focus on measuring intensity ratios of the dominant atomic emission lines, He(706 nm), O(777 nm), and O(844 nm), for comparing the four different COST jets
Summary
Atmospheric pressure plasma jets have attracted significant interest due to their application potential, such as in potential cancer treatments and wound healing [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15], plasma chemical [16,17,18] and material synthesis [19, 20], and surface modifications like thin film deposition [21, 22], etching of photoresist [23], and pre-treatment of plastic surfaces [24]. Both RONS and electric fields individually are already known to play vital roles in existing therapeutics [27,28,29], and the ability of plasmas to directly generate and simultaneously deliver these offers significant advantages and potential In this context, it is crucial to elucidate mechanisms, and to that end efficient and accurate transfer of knowledge across the community is critical in order to accelerate the pace of research. This can, result in a lot of redundancy of research, but more critically, without correlation of plasma parameters, causation mechanisms of plasma-induced biological processes is extremely difficult—if not impossible To help overcome these difficulties, within the European Cooperation for Science and Technology (COST) Action MP1101 ‘biomedical applications of atmospheric pressure plasmas’ [30], a reference plasma source for atmospheric pressure plasmas, the COST reference microplasma jet, or the socalled ‘COST jet’ was introduced [31]. This should serve as an aid for plasma source developers to help better understand the origin of variability in various plasma parameters
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
