Chemical kinetics in an atmospheric pressure helium plasma containing humidity

Schröter, Sandra; Wijaikhum, A.; Gibson, Andrew; West, Andrew; Davies, Helen Louise; Minesi, Nicolas; Dedrick, James; Wagenaars, E.; Oliveira, N. de; Nahon, Laurent; Kushner, Mark J.; Booth, Jean-Paul; Niemi, Kari; Gans, Timo; O’Connell, Deborah

doi:10.1039/c8cp02473a

Cited by 80 publications

(153 citation statements)

References 171 publications

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“…The reactive species found in the early afterglow are definitely Ar metastables, and there could also be some long living chemically reactive species, such as nitric oxides and ozone [10,37]. There is a strong gradient in the concentration of OH radicals at the edge of the plasma jet [38].…”

Section: Resultsmentioning

confidence: 99%

Evolution of the Surface Wettability of PET Polymer upon Treatment with an Atmospheric-Pressure Plasma Jet

2020

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A useful technique for pre-treatment of polymers for improved biocompatibility is surface activation. A method for achieving optimal wettability at a minimal thermal load and unwanted modifications of the polymer properties is elaborated in this paper. Samples of polyethylene terephthalate polymer were exposed to an atmospheric-pressure plasma jet created by a high-impedance low-frequency discharge in wet argon. Different treatment times and distances from the end of the glowing discharge enabled detailed investigation of the evolution of surface activation. A rather fast saturation of the surface wettability over the area of the order of cm2 was observed upon direct treatment with the glowing discharge. At a distance of few mm from the glowing discharge, the activation was already two orders of magnitude lower. Further increase of the distance resulted in negligible surface effects. In the cases of a rapid activation, very sharp interphase between the activated and unaffected surface was observed and explained by peculiarities of high-impedance discharges sustained in argon with the presence of impurities of water vapor. Results obtained by X-ray photoelectron spectroscopy confirmed that the activation was a consequence of functionalization with oxygen functional groups.

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Section: Resultsmentioning

confidence: 99%

Evolution of the Surface Wettability of PET Polymer upon Treatment with an Atmospheric-Pressure Plasma Jet

2020

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“…+ 2H + + 2e À # 2H 2 O). 55,56 The presence of other species, such as hydroxyl radicals, superoxide anion radicals, or nitric oxide can be shown in liquids by electron paramagnetic resonance, 57 assumed from gas phase distributions, 27,58,59 or from the detection of modied organic or inorganic targets by the plasma treatment. 51,60 Given their high reactivity, the contribution of short lived ROS and RNS to the modication of biomolecules is assumingly signicant.…”

Section: Introductionmentioning

confidence: 99%

On a heavy path – determining cold plasma-derived short-lived species chemistry using isotopic labelling

et al. 2020

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“…A set of modified COST jet configurations was developed and characterized that allows the separation of the particle and photons to study their isolated or combined effects [19]. Moreover, accurate computational models have been developed to predict the chemical kinetics in the gas phase [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Applications of the COST Plasma Jet: More than a Reference Standard

Gorbanev

Golda

Gathen

et al. 2019

Plasma

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The rapid advances in the field of cold plasma research led to the development of many plasma jets for various purposes. The COST plasma jet was created to set a comparison standard between different groups in Europe and the world. Its physical and chemical properties are well studied, and diagnostics procedures are developed and benchmarked using this jet. In recent years, it has been used for various research purposes. Here, we present a brief overview of the reported applications of the COST plasma jet. Additionally, we discuss the chemistry of the plasma-liquid systems with this plasma jet, and the properties that make it an indispensable system for plasma research.

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Chemical kinetics in an atmospheric pressure helium plasma containing humidity

Abstract: Investigating the formation and kinetics of O and OH in a He–H2O plasma jet using absorption spectroscopy and 0D modelling.

Cited by 80 publications

References 171 publications

Evolution of the Surface Wettability of PET Polymer upon Treatment with an Atmospheric-Pressure Plasma Jet

Evolution of the Surface Wettability of PET Polymer upon Treatment with an Atmospheric-Pressure Plasma Jet

On a heavy path – determining cold plasma-derived short-lived species chemistry using isotopic labelling

Applications of the COST Plasma Jet: More than a Reference Standard

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