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• W2623720199 abstract "Non-thermal plasmas (NTP) technologies have received a great attention these last ten years for decontamination of biological and chemical agents. It has been applied in several domains like depollution of industrial effluents, disinfection of water and air, sterilization of various surfaces for food and medical industry and, recently, biomedical applications (wounds disinfection and treatment of diseases). The main interest of NTP is their ability to produce very reactive species (e.g. radicals, excited species, UV ...) without heating the bulk of gas: the energy deposited in the plasma is mainly transferred to electrons that will generate reactive species by inelastic collisions with the gas molecules. The gas temperature is typically a few tens of Celsius degrees, so NTP are suitable for decontamination of thermally sensitive materials.Different NTP technologies have been developed for biological decontamination of surfaces and have shown promising results. Many of them are based on direct exposure of the surface to an electrical discharge: the target must be placed between electrodes and only very thin objects can be treated. Another technique has emerged: atmospheric pressure non-thermal plasma jets. The plasma is not confined between electrodes; it expands toward the target, so that it can be applied to objects with a large volume or a complex shape.In this paper, we present an innovative NTP jet technology based on “plasma bullets” phenomenon: the jet consist of ionization waves that travel through the gas up to the surface. The reactive species are then generated in the vicinity of the microbial target instead of being transported from a remote plasma source. The device developed at ONERA consists of an electrical discharge reactor fed by helium and powered by a high-voltage pulse generator. It allows the propagation of parallel plasma jets over several centimeters in ambient air (see Fig. 1). The aim of this work is to assess the efficiency of our NTP jets in terms of biological decontamination over several kinds of surfaces (steel, plastic, rubber, glass). The samples are contaminated with different bacteria (E. coli, B. cereus, S. aureus), and the survival curves are determined as a function of plasma treatment parameters. A physical characterization of the plasma jet is performed in order to understand and to optimize the biocidal effects.Fig." @default.
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• W2623720199 date "2015-03-16" @default.
• W2623720199 modified "2023-09-24" @default.
• W2623720199 title "JEBBIOS: Atmospheric pressure non-thermal plasma jets. An innovative technology for biological decontamination of surfaces" @default.
• W2623720199 hasPublicationYear "2015" @default.
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