scholarly journals Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

2019 ◽  
Vol 9 (17) ◽  
pp. 3505 ◽  
Author(s):  
Vladislav Gamaleev ◽  
Naoyuki Iwata ◽  
Masaru Hori ◽  
Mineo Hiramatsu ◽  
Masafumi Ito
Keyword(s):  
Biomedical Applications ◽  
Atmospheric Pressure Plasma ◽  
Ambient Air ◽  
Bactericidal Effect ◽  
Plasma Jets ◽  
Dielectric Barrier Discharges ◽  
Operation Costs ◽  
Arc Discharges ◽  
Barrier Discharges ◽  
Production And Operation

In this work, we developed a portable device with low production and operation costs for generating an ambient air low-current arc (AALCA) that is transferred to the surface of a treated liquid. It was possible to generate a stable discharge, irrespective of the conductivity of the treated liquid, as a sequence of corona, repeating spark, and low-current arc discharges. The estimated concentration of reactive oxygen and nitrogen species (RONS) in plasma-treated water (PTW) produced using AALCA treatment was two orders of magnitude higher than that of PTW produced using conventional He nonequilibrium atmospheric pressure plasma jets or dielectric barrier discharges. The strong bactericidal effect of the treatment using AALCA and the water treated using AALCA was confirmed by survival tests of Escherichia coli. Further, the possibility of treating a continuous flow of liquid using AALCA was demonstrated.

scholarly journals Plasma and Nanomaterials: Fabrication and Biomedical Applications

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 98 ◽  
Author(s):  
Nagendra Kaushik ◽  
Neha Kaushik ◽  
Nguyen Linh ◽  
Bhagirath Ghimire ◽  
Anchalee Pengkit ◽  
...  
Keyword(s):  
Thermal Plasma ◽  
Reactive Nitrogen Species ◽  
Biomedical Applications ◽  
Medical Personnel ◽  
Plasma Jets ◽  
Dielectric Barrier Discharges ◽  
Different Types ◽  
Non Thermal Plasma ◽  
Review Reports ◽  
Barrier Discharges

Application of plasma medicine has been actively explored during last several years. Treating every type of cancer remains a difficult task for medical personnel due to the wide variety of cancer cell selectivity. Research in advanced plasma physics has led to the development of different types of non-thermal plasma devices, such as plasma jets, and dielectric barrier discharges. Non-thermal plasma generates many charged particles and reactive species when brought into contact with biological samples. The main constituents include reactive nitrogen species, reactive oxygen species, and plasma ultra-violets. These species can be applied to synthesize biologically important nanomaterials or can be used with nanomaterials for various kinds of biomedical applications to improve human health. This review reports recent updates on plasma-based synthesis of biologically important nanomaterials and synergy of plasma with nanomaterials for various kind of biological applications.

scholarly journals Scalable Treatment of Flowing Organic Liquids Using Ambient-Air Glow Discharge for Agricultural Applications

2020 ◽  
Vol 10 (3) ◽  
pp. 801 ◽  
Author(s):  
Vladislav Gamaleev ◽  
Naoyuki Iwata ◽  
Ginji Ito ◽  
Masaru Hori ◽  
Mineo Hiramatsu ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Growth Promotion ◽  
Ambient Air ◽  
Bactericidal Effect ◽  
Organic Liquids ◽  
Flowing Liquid ◽  
Operation Costs ◽  
Agricultural Applications ◽  
Production And Operation ◽  
Sprout Growth

In this work, we developed a portable device with low production and operation costs for generating ambient-air glow discharge (AAGD) that is transferred to the surface of flowing liquid and demonstrated its applicability to practical use in agriculture. An experiment procedure that ensured the stable treatment of various liquids was established. Additionally, it was found that humidity did not have a significant effect on the treatment process, which makes the use of the developed device possible in various locations. It was found that an L-phenylalanine solution treated with AAGD allows simultaneous 40% hydroponic radish-sprout growth promotion with a bactericidal effect. Further, scalability and practical-application possibilities in hydroponic plant growth were discussed.

scholarly journals Multi-Device Piezoelectric Direct Discharge for Large Area Plasma Treatment

Plasma ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 281-293
Author(s):  
Dariusz Korzec ◽  
Florian Hoppenthaler ◽  
Anatoly Shestakov ◽  
Dominik Burger ◽  
Andrej Shapiro ◽  
...  
Keyword(s):  
Atmospheric Pressure Plasma ◽  
Energy Coupling ◽  
Limiting Factors ◽  
Dielectric Barrier Discharges ◽  
Large Area ◽  
Image Recording ◽  
Cold Atmospheric Pressure Plasma ◽  
Planar Substrates ◽  
Barrier Discharges ◽  
Direct Discharge

The piezoelectric cold plasma generators (PCPG) allow for production of the piezoelectric direct discharge (PDD), which is a kind of cold atmospheric pressure plasma (APP). The subjects of this study are different arrays of PCPGs for large-area treatment of planar substrates. Two limiting factors are crucial for design of such arrays: (i) the parasitic coupling between PCPGs resulting in minimum allowed distance between devices, and (ii) the homogeneity of large area treatment, requiring an overlap of the activation zones resulting from each PCPG. The first limitation is investigated by the use of electric measurements. The minimum distance for operation of 4 cm between two PCPGs is determined by measurement of the energy coupling from an active PCPG to a passive one. The capacitive probe is used to evaluate the interference between signals generated by two neighboring PCPGs. The second limitation is examined by activation image recording (AIR). Two application examples illustrate the compromising these two limiting factors: the treatment of large area planar substrates by PCPG array, and the pretreatment of silicon wafers with an array of PCPG driven dielectric barrier discharges (DBD).

scholarly journals Cold atmospheric pressure plasma jets as sources of singlet delta oxygen for biomedical applications

2011 ◽  
Vol 109 (12) ◽  
pp. 123302 ◽  
Author(s):  
J. S. Sousa ◽  
K. Niemi ◽  
L. J. Cox ◽  
Q. Th. Algwari ◽  
T. Gans ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Biomedical Applications ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jets ◽  
Pressure Plasma ◽  
Cold Atmospheric Pressure Plasma

Mineralization of flexible mesoporous TiO2 photoanodes using two low-temperature dielectric barrier discharges in ambient air

2018 ◽  
Vol 59 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Masoud Shekargoftar ◽  
Petr Dzik ◽  
Zuzana Ďurašová ◽  
Monika Stupavská ◽  
David Pavliňák ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ambient Air ◽  
Mesoporous Tio2 ◽  
Dielectric Barrier Discharges ◽  
Dielectric Barrier ◽  
Barrier Discharges

Mass Spectrometry Analyses of Ions Generated by Atmospheric-Pressure Plasma Jets in Ambient Air

2015 ◽  
Vol 5 (2-4) ◽  
pp. 283-298 ◽  
Author(s):  
Tomoko Ito ◽  
Kensaku Gotoh ◽  
Kanako Sekimoto ◽  
Satoshi Hamaguchi
Keyword(s):  
Mass Spectrometry ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Ambient Air ◽  
Plasma Jets ◽  
Pressure Plasma

scholarly journals Visualization of Activated Area on Polymers for Evaluation of Atmospheric Pressure Plasma Jets

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2711
Author(s):  
Dariusz Korzec ◽  
Thomas Andres ◽  
Eva Brandes ◽  
Stefan Nettesheim
Keyword(s):  
Atmospheric Pressure ◽  
Polymer Surface ◽  
Digital Camera ◽  
Atmospheric Pressure Plasma ◽  
Acrylonitrile Butadiene Styrene ◽  
Ambient Air ◽  
Substrate Material ◽  
Plasma Jets ◽  
Activation Area ◽  
Pressure Plasma

The treatment of a polymer surface using an atmospheric pressure plasma jet (APPJ) causes a local increase of the surface free energy (SFE). The plasma-treated zone can be visualized with the use of a test ink and quantitatively evaluated. However, the inked area is shrinking with time. The shrinkage characteristics are collected using activation image recording (AIR). The recording is conducted by a digital camera. The physical mechanisms of activation area shrinkage are discussed. The error sources are analyzed and methods of error reduction are proposed. The standard deviation of the activation area is less than 3%. Three polymers, acrylonitrile butadiene styrene (ABS), high-density polyethylene (HDPE), and polyoxymethylene (POM), are examined as a test substrate material. Due to a wide variation range of SFE and a small hydrophobic recovery, HDPE is chosen. Since the chemical mixtures tend to temporal changes of the stoichiometry, the pure formamide test ink with 58 mN/m is selected. The method is tested for the characterization of five different types of discharge: (i) pulsed arc APPJ with the power of about 700 W; (ii) piezoelectric direct discharge APPJ; (iii) piezoelectric driven needle corona in ambient air; (iv) piezoelectric driven plasma needle in argon; and (v) piezoelectric driven dielectric barrier discharge (DBD). For piezoelectrically driven discharges, the power was either 4.5 W or 8 W. It is shown how the AIR method can be used to solve different engineering problems.

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