Characteristics of Portable Air Floating-Electrode Dielectric-Barrier-Discharge Plasmas Used for Biomedicine

Zhao, Lu-Xiang; Zhao, Heng-Xin; Chen, Hao; Hu, Chang; Zhang, Yu; Li, He-Ping

doi:10.1007/s11090-023-10384-1

Cited by 4 publications

(1 citation statement)

References 60 publications

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“…The dielectric barrier layer(s) between electrodes is critical important to keep DBD plasma in good uniformity by limiting discharge current and preventing arc formation [4]. Therefore, DBD has broad application prospects in various fields, including material surface treatment [5,6], ozone synthesis [7,8], environmental protection [9,10], and plasma biomedicine [11,12]. To treat the material surface more evenly and further improve the energy efficiency of DBD, it is important to enhance the discharge uniformity of DBD further.…”

Section: Introductionmentioning

confidence: 99%

Effect of dielectric material on the uniformity of nanosecond pulsed dielectric barrier discharge

ZHOU 周,

ZHANG 张,

DUAN 段

et al. 2024

Plasma Sci. Technol.

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Dielectric barrier discharge (DBD) is considered as a promising technique to produce large volume uniform plasma at atmospheric pressure, and the dielectric barrier layer between the electrodes plays a key role in the DBD processes and enhancing discharge uniformity. In this work, the uniformity and discharge characteristics of the nanosecond (ns) pulsed DBD with dielectric barrier layers made of alumina, quartz glass, polycarbonate (PC), and polypropylene (PP) are investigated via discharge image observation, voltage-current waveform measurement and optical emission spectral diagnosis. Through analyzing discharge image by gray value standard deviation method, the discharge uniformity is quantitatively calculated. The effects of the space electric field intensity, the electron density (Ne), and the space reactive species on the uniformity are studied with quantifying the gap voltage Ug and the discharge current Ig, analyzing the recorded optical emission spectra, and simulating the temporal distribution of Ne with a one-dimensional fluid model. It is found that as the relative permittivity of the dielectric materials increases, the space electric field intensity is enhanced, which results in a higher Ne and electron temperature (Te). Therefore, an appropriate value of space electric field intensity can promote electron avalanches, resulting in uniform and stable plasma by the merging of electron avalanches. However, an excessive value of space electric field intensity leads to the aggregation of space charges and the distortion of the space electric field, which reduce the discharge uniformity. The surface roughness and the surface charge decay are measured to explain the influences of the surface properties and the second electron emission on the discharge uniformity. The results in this work give a comprehensive understanding of the effect of the dielectric materials on the DBD uniformity, and contribute to the selection of dielectric materials for DBD reactor and the realization of atmospheric pressure uniform, stable, and reactive plasma sources.

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Section: Introductionmentioning

confidence: 99%

Effect of dielectric material on the uniformity of nanosecond pulsed dielectric barrier discharge

ZHOU 周,

ZHANG 张,

DUAN 段

et al. 2024

Plasma Sci. Technol.

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The dynamics and transport of ozone in the gas and liquid phase generated by air surface microdischarge plasma at atmospheric pressure

Wang,

Liu,

Feng

et al. 2024

Plasma Processes & Polymers

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This contribution focuses on the spatial‐temporal behavior and reactive pathways of O3 produced by a surface air microdischarge in the gas and liquid phase using ultraviolet absorption spectroscopy. The findings demonstrate that mode transition from ozone to nitrogen oxide over time is observed at a constant input power higher than ~0.60 W/cm2. Due to the long‐lived characteristic and ionic wind, the perpendicular distribution of O3 is almost uniform. The maximum penetration depth is around 5 mm, and the gas–liquid mass transfer efficiency is approximately 0.4‱ at a depth of 1 mm, when the treatment time is 10 min. The mass transfer of O3 between gas and liquid phases is dominated by the liquid convention induced by ionic wind.

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Special Issue on “Dielectric Barrier Discharges and their Applications” in Commemoration of the 20th Anniversary of Dr. Ulrich Kogelschatz’s Work

Bogaerts

2023

Plasma Chem Plasma Process

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Characteristics of Portable Air Floating-Electrode Dielectric-Barrier-Discharge Plasmas Used for Biomedicine

Cited by 4 publications

References 60 publications

Effect of dielectric material on the uniformity of nanosecond pulsed dielectric barrier discharge

Effect of dielectric material on the uniformity of nanosecond pulsed dielectric barrier discharge

The dynamics and transport of ozone in the gas and liquid phase generated by air surface microdischarge plasma at atmospheric pressure

Special Issue on “Dielectric Barrier Discharges and their Applications” in Commemoration of the 20th Anniversary of Dr. Ulrich Kogelschatz’s Work

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