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Plasma
Special Issues
Low Temperature Plasma Jets: Physics, Diagnostics and Applications
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Low Temperature Plasma Jets: Physics, Diagnostics and Applications

A special issue of Plasma (ISSN 2571-6182).

Deadline for manuscript submissions: closed (1 September 2019) | Viewed by 44224

Special Issue Editor

Prof. Dr. Mounir Laroussi

E-Mail Website1 Website2
Guest Editor
Electrical & Computer Engineering Department, Old Dominion University, Norfolk, VA 23529, USA
Interests: plasma science; biomedical applications of plasmas; gaseous electronics; EM waves interactions with plasmas; plasma processing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Atmospheric pressure non-thermal plasma jets are playing an ever-increasing role in many plasma processing applications, including surface treatment and in biomedicine. Since the discovery that the generation of these plasma jets is enabled by guided ionization waves (commonly known as plasma bullets) numerous experimental and modeling works have been conducted to elucidate their mechanisms of propagation. In addition, their well-established use in biomedical research has prompted more detailed studies on their physical and chemical characteristics. This Special Issue aims to provide a collection of papers on the fundamental aspects as well as applications of non-thermal plasma jets. These include diagnostics of the jet themselves, their interactions with surfaces, and their use in various industrial and scientific applications. Topics include (but are not limited to):

  • Experimental measurements of the various jet parameters (electric field, charge density, reactive species concentrations, etc.)
  • Interaction of jets with conducting and dielectric surfaces and with liquids
  • Interaction of jets with each other
  • Material processing (deposition, etching, ashing, etc.)
  • Chemical applications
  • Biological applications
  • Medical applications

Prof. Dr. Mounir Laroussi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plasma is an international peer-reviewed open access quarterly journal published by MDPI.

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Related Special Issue

Published Papers (8 papers)

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Editorial

Jump to: Research, Review

2 pages, 196 KiB  
Editorial
Special Issue on Low Temperature Plasma Jets
by Mounir Laroussi
Plasma 2019, 2(3), 339-340; https://doi.org/10.3390/plasma2030025 - 31 Jul 2019
Cited by 2 | Viewed by 3410
Abstract
Low temperature plasma jets are unique plasma sources capable of delivering plasma outside of the confinement of electrodes and away from gas enclosures/chambers [...] Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)

Research

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16 pages, 1325 KiB  
Article
Spatially-Resolved Spectroscopic Diagnostics of a Miniature RF Atmospheric Pressure Plasma Jet in Argon Open to Ambient Air
by Florent P. Sainct, Antoine Durocher-Jean, Reetesh Kumar Gangwar, Norma Yadira Mendoza Gonzalez, Sylvain Coulombe and Luc Stafford
Plasma 2020, 3(2), 38-53; https://doi.org/10.3390/plasma3020005 - 1 Apr 2020
Cited by 11 | Viewed by 4411
Abstract
The spatially-resolved electron temperature, rotational temperature, and number density of the two metastable Ar 1 s levels were investigated in a miniature RF Ar glow discharge jet at atmospheric pressure. The 1 s level population densities were determined from optical absorption spectroscopy (OAS) [...] Read more.
The spatially-resolved electron temperature, rotational temperature, and number density of the two metastable Ar 1 s levels were investigated in a miniature RF Ar glow discharge jet at atmospheric pressure. The 1 s level population densities were determined from optical absorption spectroscopy (OAS) measurements assuming a Voigt profile for the plasma emission and a Gaussian profile for the lamp emission. As for the electron temperature, it was deduced from the comparison of the measured Ar 2 p i → 1 s j emission lines with those simulated using a collisional-radiative model. The Ar 1 s level population higher than 10 18 m − 3 and electron temperature around 2.5 eV were obtained close to the nozzle exit. In addition, both values decreased steadily along the discharge axis. Rotational temperatures determined from OH(A) and N 2 (C) optical emission featured a large difference with the gas temperature found from a thermocouple; a feature ascribed to the population of emitting OH and N 2 states by energy transfer reactions involving the Ar 1 s levels. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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7 pages, 3007 KiB  
Article
Ignition of A Plasma Discharge Inside An Electrodeless Chamber: Methods and Characteristics
by Mounir Laroussi
Plasma 2019, 2(4), 380-386; https://doi.org/10.3390/plasma2040030 - 14 Oct 2019
Cited by 2 | Viewed by 4264
Abstract
In this paper the generation and diagnostics of a reduced pressure (300 mTorr to 3 Torr) plasma generated inside an electrodeless containment vessel/chamber are presented. The plasma is ignited by a guided ionization wave emitted by a low temperature pulsed plasma jet. The [...] Read more.
In this paper the generation and diagnostics of a reduced pressure (300 mTorr to 3 Torr) plasma generated inside an electrodeless containment vessel/chamber are presented. The plasma is ignited by a guided ionization wave emitted by a low temperature pulsed plasma jet. The diagnostics techniques include Intensified Charge Coupled Device (ICCD) imaging, emission spectroscopy, and Langmuir probe. The reduced-pressure discharge parameters measured are the magnitude of the electric field, the plasma electron number density and temperature, and discharge expansion speed. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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11 pages, 2358 KiB  
Article
Experimental Investigation on the Influence of Target Physical Properties on an Impinging Plasma Jet
by Emanuele Simoncelli, Augusto Stancampiano, Marco Boselli, Matteo Gherardi and Vittorio Colombo
Plasma 2019, 2(3), 369-379; https://doi.org/10.3390/plasma2030029 - 16 Sep 2019
Cited by 22 | Viewed by 4583
Abstract
The present work aims to investigate the interaction between a plasma jet and targets with different physical properties. Electrical, morphological and fluid-dynamic characterizations were performed on a plasma jet impinging on metal, dielectric and liquid substrates by means of Intensified Charge-Coupled Device (ICCD) [...] Read more.
The present work aims to investigate the interaction between a plasma jet and targets with different physical properties. Electrical, morphological and fluid-dynamic characterizations were performed on a plasma jet impinging on metal, dielectric and liquid substrates by means of Intensified Charge-Coupled Device (ICCD) and high-speed Schlieren imaging techniques. The results highlight how the light emission of the discharge, its time behavior and morphology, and the plasma-induced turbulence in the flow are affected by the nature of the target. Surprisingly, the liquid target induces the formation of turbulent fronts in the gas flow similar to the metal target, although the dissipated power in the former case is lower than in the latter. On the other hand, the propagation velocity of the turbulent front is independent of the target nature and it is affected only by the working gas flow rate. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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12 pages, 3433 KiB  
Article
Investigation of Power Transmission of a Helium Plasma Jet to Different Dielectric Targets Considering Operating Modes
by Tilman Teschner, Robert Bansemer, Klaus-Dieter Weltmann and Torsten Gerling
Plasma 2019, 2(3), 348-359; https://doi.org/10.3390/plasma2030027 - 22 Aug 2019
Cited by 12 | Viewed by 4371
Abstract
The interaction of an atmospheric pressure plasma jet with different dielectric surfaces is investigated using a setup of two ring electrodes around a ceramic capillary. In this study, in addition to electrical measurement methods such as the determination of voltage and current, special [...] Read more.
The interaction of an atmospheric pressure plasma jet with different dielectric surfaces is investigated using a setup of two ring electrodes around a ceramic capillary. In this study, in addition to electrical measurement methods such as the determination of voltage and current, special emphasis was placed on the power measurements at the electrodes and the effluent. The power dissipation is correlated with Fourier-transform infrared (FTIR) absorption spectroscopy measurements of O3 and NO2 densities. The results show the correlation between the dielectric constant and the dissipated power at the target. The ratio between power dissipation at the grounded ring electrode and the grounded surface shows an increase with increasing dielectric constant of the target. A correlation of the results with bacteria, tissue and water as envisaged dielectric targets shows four times the power dissipation at the treatment spot between bacteria and tissue. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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9 pages, 1807 KiB  
Article
Hydrogen Peroxide Interference in Chemical Oxygen Demand Assessments of Plasma Treated Waters
by Joseph Groele and John Foster
Plasma 2019, 2(3), 294-302; https://doi.org/10.3390/plasma2030021 - 5 Jul 2019
Cited by 14 | Viewed by 7921
Abstract
Plasma-driven advanced oxidation represents a potential technology to safely re-use waters polluted with recalcitrant contaminants by mineralizing organics via reactions with hydroxyl radicals, thus relieving freshwater stress. The process results in some residual hydrogen peroxide, which can interfere with the standard method for [...] Read more.
Plasma-driven advanced oxidation represents a potential technology to safely re-use waters polluted with recalcitrant contaminants by mineralizing organics via reactions with hydroxyl radicals, thus relieving freshwater stress. The process results in some residual hydrogen peroxide, which can interfere with the standard method for assessing contaminant removal. In this work, methylene blue is used as a model contaminant to present a case in which this interference can impact the measured chemical oxygen demand of samples. Next, the magnitude of this interference is investigated by dosing de-ionized water with hydrogen peroxide via dielectric barrier discharge plasma jet and by solution. The chemical oxygen demand increases with increasing concentration of residual hydrogen peroxide. The interference factor should be considered when assessing the effectiveness of plasma to treat various wastewaters. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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11 pages, 2307 KiB  
Article
Emission Spectroscopic Characterization of a Helium Atmospheric Pressure Plasma Jet with Various Mixtures of Argon Gas in the Presence and the Absence of De-Ionized Water as a Target
by Nima Bolouki, Jang-Hsing Hsieh, Chuan Li and Yi-Zheng Yang
Plasma 2019, 2(3), 283-293; https://doi.org/10.3390/plasma2030020 - 4 Jul 2019
Cited by 11 | Viewed by 6620
Abstract
A helium-based atmospheric pressure plasma jet (APPJ) with various flow rates of argon gas as a variable working gas was characterized by utilizing optical emission spectroscopy (OES) alongside the plasma jet. The spectroscopic characterization was performed through plasma exposure in direct and indirect [...] Read more.
A helium-based atmospheric pressure plasma jet (APPJ) with various flow rates of argon gas as a variable working gas was characterized by utilizing optical emission spectroscopy (OES) alongside the plasma jet. The spectroscopic characterization was performed through plasma exposure in direct and indirect interaction with and without de-ionized (DI) water. The electron density and electron temperature, which were estimated by Stark broadening of atomic hydrogen (486.1 nm) and the Boltzmann plot, were investigated as a function of the flow rate of argon gas. The spectra obtained by OES indicate that the hydroxyl concentrations reached a maximum value in the case of direct interaction with DI water as well as upstream of the plasma jet for all cases. The relative intensities of hydroxyl were optimized by changing the flow rate of argon gas. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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Review

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12 pages, 6518 KiB  
Review
Applications of the COST Plasma Jet: More than a Reference Standard
by Yury Gorbanev, Judith Golda, Volker Schulz-von der Gathen and Annemie Bogaerts
Plasma 2019, 2(3), 316-327; https://doi.org/10.3390/plasma2030023 - 12 Jul 2019
Cited by 37 | Viewed by 7165
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
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