Experimental approaches for studying non-equilibrium atmospheric plasma jets

Shashurin, Alexey; Keidar, Michael

doi:10.1063/1.4933365

Cited by 55 publications

(43 citation statements)

References 57 publications

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“…, where is the output signal and is the scatter constant 36,37 . The volume of the plasma column was determined from the Intensified Charged-Coupled Device (ICCD) images.…”

Section: /mentioning

confidence: 99%

Cold atmospheric plasma discharged in water and its potential use in cancer therapy

Chen¹,

Cheng²,

Lin³

et al. 2016

J. Phys. D: Appl. Phys.

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Cold atmospheric plasma (CAP) has been emerged as a novel technology for cancer treatment.CAP can directly treat cells and tissue but such direct application is limited to skin or can be invoked as a supplement during open surgery. In this study we report indirect plasma treatment using CAP discharged in DI water using three gases as carriers (argon, helium and nitrogen).Plasma stimulated water was applied to human breast cancer cell line (MDA-MB-231). MTT assay tests showed that using argon plasma had the strongest effect on inducing apoptosis in cultured human breast cancer cells. This result is attributed to the elevated production of the reactive oxygen species and reactive nitrogen species in water in the case of argon plasma.

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“…, where is the output signal and is the scatter constant 36,37 . The volume of the plasma column was determined from the Intensified Charged-Coupled Device (ICCD) images.…”

Section: /mentioning

confidence: 99%

Cold atmospheric plasma discharged in water and its potential use in cancer therapy

Chen¹,

Cheng²,

Lin³

et al. 2016

J. Phys. D: Appl. Phys.

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“…The most typical plasma devices operate at 10-50 kHz frequency with the voltage of 2.5 kV-20 kV, applied to the electrode embedded inside of the dielectric tube. The streamer appears over the positive cycle of the applied voltage and propagates inside and outside of the dielectric tube [3,4]. Usually a noble gas is pumping through the dielectric tube since the critical voltage of the breakdown in the noble gases is essentially lower that in the atmospheric air.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Cold Atmospheric Argon and Helium Plasma Jets with Bio-Target with Grounded Substrate Beneath

et al. 2019

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The cold atmospheric pressure plasma jet interaction with the bio-target is studied in the plasma experiment, 2D fluid model simulations, and with MTT and iCELLigence assays of the viability of cancer cells. It is shown, for the first time, that the use of the grounded substrate under the media with cells considerably amplifies the effect of plasma cancer cell treatment in vitro. Plasma devices with cylindrical and plane geometries generating cold atmospheric plasma jets are developed and tested. The sequence of the streamers which forms the plasma jet is initiated with a voltage of 2.5–6.5 kV applied with the frequency 40 kHz. We suggest using the grounded substrate under the bio-target during the plasma jet treatment of cancer cells. The analysis of the measured plasma spectra and comparison of OH-line intensity for different voltages and gas flow rates allows us to find a range of optimal plasma parameters for the enhanced OH generation. The time-dependent viability is measured for human cell lines, A431 (skin carcinoma), HEK 293 (kidney embryonic cells), and A549 (human lung adenocarcinoma cells) after the plasma jet treatment. The results with cell-based experiments (direct treatment) performed with various plasma jet parameters confirm the maximum efficiency of the treatment with the optimal plasma parameters.

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“…[15][16][17] In a single plasma jet, the effects of fluid field, electrical field, and device structure on the electrical characteristics, propagation dynamics, and plume length have been widely investigated with optical and electrical diagnosis, ICCD imaging, and Schlieren photography. [18][19][20][21][22][23] It has been found that the plasma plume propagates in different modes, [10,24] there are strongly nonlinear coupling effects of ionization waves determining streamer propagation, [25] the gas heating is the dominant factor for the transition of laminar to turbulent of plasma jet and the plume length, [3,26] and the linear-field and cross-field structures APPJs have also been compared and studied. [27] For jet arrays, there are strong jet-to-jet coupling interactions causing by gas flowing and electrical field from adjacent plasma plumes, which leads to plume divergence, [10,28] different discharge modes, [14,29] and thus affects the downstream plume uniformity and treatment effects.…”

Section: Introductionmentioning

confidence: 99%

Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Liu

Zhang

Fang

et al. 2017

Plasma Processes & Polymers

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Atmospheric Pressure Plasma Jet (APPJ) arrays are considered as one of the most promising methods for uniform plasma processing of large uneven surfaces. To improve the downstream uniformity and enhance the surface treatment effects, it is important to reveal the mechanisms of the jet‐to‐jet interactions of plasma plumes in the jet array. In this paper, the electrical, optical, and fluid characteristics of the He and Ar three‐channel one‐dimensional (1D) plasma jet arrays with cross‐field needle‐ring electrode structure are studied and compared. It is found that there are divergences in the outside plumes of the propagation trajectory by the repellency of the plasma bullets and the spatial uniformity of the He and Ar plasma jet arrays can be improved with a lower applied voltage and a higher gas flow rate. The deflection angle of side plumes with respect to the central one of He is larger than that of Ar jet array due to the lighter molecular weight and better discharge synchronization. The experimental results show that Ar jet array is more controllable and stable and is more suitable for the design of the practical, simpler, and cheaper scalable plasma jet arrays.

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Experimental approaches for studying non-equilibrium atmospheric plasma jets

Cited by 55 publications

References 57 publications

Cold atmospheric plasma discharged in water and its potential use in cancer therapy

Cold atmospheric plasma discharged in water and its potential use in cancer therapy

Interaction of Cold Atmospheric Argon and Helium Plasma Jets with Bio-Target with Grounded Substrate Beneath

Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

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