A review of the gas and liquid phase interactions in low-temperature plasma jets used for biomedical applications

Morabit, Youssef; Hasan, M. I.; Whalley, Richard D.; Robert, Éric; Modić, Martina; Walsh, James L.

doi:10.1140/epjd/s10053-020-00004-4

Cited by 60 publications

(47 citation statements)

References 226 publications

(269 reference statements)

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“…Critically, the electron kinetics in a non-equilibrium plasma depend on a number of operating parameters (e.g. gas flow, voltage amplitude, frequency, and waveform) and the target characteristics such as the conductivity, grounding arrangement and other material properties 8 – 12 . A comprehensive discussion on these topics can be found in 13 – 16 .…”

Section: Introductionmentioning

confidence: 99%

Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

Slikboer

Walsh

2021

Sci Rep

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The interaction between an argon plasma jet excited using microsecond duration voltage pulses and a liquid target was examined using Thomson scattering to quantify the temporal evolution of the electron density and temperature. The electrical resistance between a liquid target and the electrical ground was varied from 1 to $$680\, \text {k}\Omega $$ 680 k Ω to mimic different conductivity liquids while the influence of the varying electrical properties on the electron dynamics within the plasma were examined. It was demonstrated that the interaction between the plasma jet and a liquid target grounded via a high resistance resulted in typical dielectric barrier discharge behaviour, with two discharge events per applied voltage pulse. Under such conditions, the electron density and temperature reached a peak of $$1\cdot 10^{15}\, \text {cm}^{-3}$$ 1 · 10 15 cm - 3 and 3.4 eV, respectively; with both rapidly decaying over several hundreds of nanoseconds. For liquid targets grounded via a low resistance, the jet behaviour transitioned to a DC-like discharge, with a single breakdown event being observed and sustained throughout the duration of each applied voltage pulse. Under such conditions, electron densities of $$2{-}3 \cdot 10^{15}\, \text {cm}^{-3}$$ 2 - 3 · 10 15 cm - 3 were detected for several microseconds. The results demonstrate that the electron dynamics in a pulsed argon plasma jet are extremely sensitive to the electrical characteristics of the target, which in the case of water, can evolve during exposure to the plasma.

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Section: Introductionmentioning

confidence: 99%

Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

Slikboer

Walsh

2021

Sci Rep

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“…The plasma jet is in a single-electrode geometry, which is one of the most common structures of the atmospheric pressure plasma jet. [22,42,43] A 7.0 cm long tungsten needle with a diameter of 1.0 mm and a tip radius of 0.4 mm is fixed at the axis of a glass tube with inner and outer diameters of 6.0 mm and 7.0 mm, respectively. The needle tip stretches out 8.0 mm from the tube end (jet nozzle).…”

Section: Methodsmentioning

confidence: 99%

Complicated streamer dynamics in petal‐like patterns formed on the substrate downstream of an argon plasma jet

Zhao

et al. 2022

Plasma Processes & Polymers

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Streamer behaviors, related to discharge patterns, can determine the distribution of active species, which play an important role in the applications of the plasma jet. In this article, petal-like patterns formed on the substrate are observed for the first time downstream of an argon plasma jet. The penta-petalous pattern is taken as an example to discuss the pattern formation mechanism, which results from two positive discharges (D p1 and D p2 ) and one negative discharge (D n ) in every voltage cycle. Fast photography is implemented to reveal the complicated streamer dynamics of D p2 . Results indicate that D p2 with a low Q undergoes a stripe phase, a homogeneous phase, and a branch phase. The complicated streamer dynamics of D p2 are analyzed based on optical emission spectra.

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“…Plasma jets are other type of reactors used in Plasma Medicine for the treatment of non-healing wounds and ulcers of the human skin [23]. Lately, researchers have investigated the use of plasma jet arrays to increase the jet intensity and electric efficiency [24][25][26][27], as well as the flow characteristics of the jet and how it influences the action on the skin tissue [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Advances on aerodynamic actuation induced by surface dielectric barrier discharges

2022

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Surface Dielectric Barrier Discharge (SDBD) is a well-known technology for active aerodynamic flow control with low power consumption. It is a type of plasma actuation for flow control with no moving parts and very fast response times. Research on SDBD flow control over the years has shown great potential for flow separation, boundary layer transition, drag reductions and suppression of local heating. A major area of research on SDBD flow control lies in increasing the effectiveness of SDBD actuators with new electrode configurations, surface materials, and plasma array designs. This review aims to provide a comprehensive report of research performed on SDBD flow control over the last 2 decades with a focus on SDBD reactor designs. Aspects of SDBD flow control including discharge morphology and actuation mechanism through momentum and energy transfer have been discussed in depth. Additionally, the future of research in SDBD actuated flow control has been explored. This review can serve as the baseline to develop new SDBD reactor designs for specific applications with improved effectiveness and advanced systems.

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A review of the gas and liquid phase interactions in low-temperature plasma jets used for biomedical applications

Cited by 60 publications

References 226 publications

Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

Complicated streamer dynamics in petal‐like patterns formed on the substrate downstream of an argon plasma jet

Advances on aerodynamic actuation induced by surface dielectric barrier discharges

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