Plasma-surface interaction: dielectric and metallic targets and their influence on the electric field profile in a kHz AC-driven He plasma jet

Sobota, Ana; Guaitella, Olivier; Sretenović, Goran B.; Kovačević, Vladimir; Slikboer, Elmar; Krstić, Ivan; Obradović, Bratislav M.; Kuraica, M. M.

doi:10.1088/1361-6595/ab0c6a

Cited by 55 publications

(62 citation statements)

References 79 publications

(154 reference statements)

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“…The same macroscopic behaviors reported in Norberg et al [27] have been observed and their effect on the electron properties have been reported, with electron density close to the target reaching three times higher values with a metallic target than a glass target. Other experimental and numerical works [12,39,51] have found the same tendencies as in Norberg et al [27], in terms of influence of the target on discharge velocity, radial spreading on the target and electric field in the front of propagation.…”

Section: Introductionsupporting

confidence: 71%

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Numerical Study of Jet–Target Interaction: Influence of Dielectric Permittivity on the Electric Field Experienced by the Target

Viegas

Bourdon

2019

Plasma Chem Plasma Process

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This work presents a study of the influence of dielectric permittivity on the interaction between a positive pulsed He plasma jet and a 0.5 mm-thick dielectric target, using a validated two-dimensional numerical model. Six different targets are studied: five targets at floating potential with relative permittivities r = 1, 4, 20, 56 and 80; and one grounded target of permittivity r = 56. The temporal evolution of the charging of the target and of the electric field inside the target are described, during the pulse of applied voltage and after its fall. It is found that the order of magnitude of the electric field inside the dielectric targets is the same for all floating targets with r ≥ 4. For all these targets, during the pulse of applied voltage, the electric field perpendicular to the target and averaged through the target thickness, at the point of discharge impact, is between 1 and 5 kV cm −1. For the two remaining targets (r = 1 and grounded target with r = 56), the field is significantly higher than for all the other floating targets.

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Section: Introductionsupporting

confidence: 71%

“…The interaction of jets with dielectric surfaces of different permittivities has been addressed in several experimental and numerical works [2,5,10,12,15,20,26,27,33,39,45,50,51,53]. In Norberg et al [27] it has been studied numerically in 2D the impact of He jets on dielectric and metallic grounded targets with a −15 kV voltage pulse.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Jet–Target Interaction: Influence of Dielectric Permittivity on the Electric Field Experienced by the Target

Viegas

Bourdon

2019

Plasma Chem Plasma Process

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“…A method called stark polarization spectroscopy is used to detect the electric field by using OES on a forbidden line of He(2 1 P–4 1 F) and the closest allowed line of He (2 1 P–4 1 D) at 492.19 nm. The method is well described in more recent publications . The electric field strength value can be determined from the distance between the allowed and the forbidden He line and is given by the formula:

E (normalk V {c m}^{- 1}) = {(- 58.557 + 18.116 Δ {italicλ}_{F A} + 3130.96 Δ {italicλ}_{F A}^{2} + 845.6 normalΔ λ_{normalF normalA}^{3})}^{0.5},

where Δ λ FA is the shift of the peak of the forbidden line from the allowed line.…”

Section: Resultsmentioning

confidence: 99%

Investigation of mode interconversion for interfacial pattern formation through plasma–surface interaction

Liu

Zhou

et al. 2019

Plasma Processes & Polymers

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The appropriate understanding of the plasma-surface interaction is crucial in optimizing the atmospheric pressure plasma jet (APPJ) to suit a particular application. In this study, we mainly focus on the behavior of mode interconversion for interfacial patterns regarding APPJ interacting with a indium tin oxide (ITO) glass substrate. By regulating the pulse voltage, annular interfacial pattern formation on ITO surface displays two types of modes, that is, the diffuse pattern and the streamer pattern. Furthermore, these two modes are not independent and are trans-2017BSHYDZZ11), the Natural Science Foundation of Shaanxi Province (Grant No. 2019JQ220), and the State F I G U R E 8 A schematic map for the pattern mode interconversion between diffuse and streamer by controlling the voltage and introducing N 2 and O 2 . The time-integrated images of interfacial pattern are taken with 100 µs gating time and 20 accumulations LIU ET AL.

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“…The electric field profile between the nozzle and target over the He plasma jet generated with 30 kHz discharge with 2 kV voltage amplitude was measured in Ref. [9], using optical emission spectroscopy on a forbidden line of Helium (2 1 P4 1 F). The electric field E delivered by the streamer to the metal grounded electrode is shown to be higher than E for the glass target case.…”

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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Plasma-surface interaction: dielectric and metallic targets and their influence on the electric field profile in a kHz AC-driven He plasma jet

Abstract: targets and their influence on the electric field profile in a kHz AC-driven He plasma jet. Plasma Sources Science and Technology, 28(4), [045003].

Cited by 55 publications

References 79 publications

Numerical Study of Jet–Target Interaction: Influence of Dielectric Permittivity on the Electric Field Experienced by the Target

Numerical Study of Jet–Target Interaction: Influence of Dielectric Permittivity on the Electric Field Experienced by the Target

Investigation of mode interconversion for interfacial pattern formation through plasma–surface interaction

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

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