Multimethods and Underlying Mechanism for Realizing Uniform Discharge From Patterned Structures by Varying Controlling Parameters

Zhang, Tongkai; Li, Ping; Ouyang, Jiting; Li, Ben

doi:10.1109/tps.2019.2905645

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…[3][4][5][6][7] Various luminescent patterns have been obtained, such as square patterns, hexagonal patterns, honeycomb patterns, and stripe patterns. [8][9][10][11][12][13] Among them, the stripe pattern has been extensively investigated owing to its typical symmetry. In 1995, Breazeal et al found stripe patterns in the He gas discharge system.…”

Section: Introductionmentioning

confidence: 99%

Intermittent discharge in a complex stripe pattern in dielectric barrier discharge

Li,

Wang,

Pan

et al. 2024

Physics of Plasmas

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The intermittent discharge that filament only discharges once in a cycle rather than once every half-cycle is observed in all the three substructures of the (bright spots)–(dark spots)-halo stripe pattern (BDHSP) in dielectric barrier discharge. The discharge characteristics are investigated by a high-speed video camera, an intensified charge-coupled device camera, and two photomultiplier tubes. It is found that the direction of the stripe choose to form in BDHSP is determined by the direction in which the surface discharge is stronger in the square pattern. The spatiotemporal dynamics results of BDHSP suggest that bright spot (B) discharges in this half-cycle, and the dark spot (D) and the halo (H) discharge in the next half-cycle of the applied voltage, which is intermittent discharge. Combined with the analysis in the electric field simulation, it can be concluded that the intermittent discharge is the result of the mutual influence between the directional selective surface discharge induced by bright spots and dark spots. Overall, the BDHSP is formed by the self-organization of the wall charge under the interaction between the plasma physical processes and the spatial distribution. The discovery of the intermittent discharge provides insight and enlightenment for the study of plasma physics.

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Section: Introductionmentioning

confidence: 99%

Intermittent discharge in a complex stripe pattern in dielectric barrier discharge

Li,

Wang,

Pan

et al. 2024

Physics of Plasmas

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Study of coaxial-dual-gap dielectric barrier discharge based on capillary: discharge characteristics and Escherichia coli decontamination

Zhu

Liu

Zhao

et al. 2023

Journal of Applied Microbiology

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Aims The medical capillary catheters occupy a high proportion of medical diagnosis, monitoring and treatment devices, and will cause serious cross-infection without being disinfected adequately. This paper presents a new plasma structure for efficient inactivation of harmful microorganisms in medical capillaries. Methods and results An innovative coaxial-dual-gap dielectric barrier discharge (CDG-DBD) reactor powered by nanosecond-pulsed power supply was designed for disinfection of Escherichia Coli (E. coli) inside and outside medical capillary catheters in this work. Atmospheric helium plasma (AHP) and atmospheric air plasma (AAP) were successfully obtained inside and outside capillary (0.6 mm inner diameter and 1.0 mm outer diameter), respectively. The electrical and optical characteristics of AHP and AAP were investigated. As the threshold of applied voltage amplitude (Uamp) was below 7.0 kV, only one helium glow discharge was generated inside the capillary at the rising and falling stages of pulse voltage. As the Uamp exceeded the threshold, two helium glow discharges were generated that further caused generation of air discharge. Under the Uamp of 9.0 kV, the production of AHP lowered the breakdown voltage in air gap, resulting in the formation of high-volume and uniform AAP, which was conducive to the realization of full inactivation. The inactivation rates of E. coli reached 98.13% and 99.99% by 2 min AHP and 0.5 min AAP treatment, respectively. Conclusions The electrical stress of AHP and the reactive oxygen and nitrogen species (RONS) produced by AAP were contributed to the inactivation of E. coli. The results of SEM show that plasma treatment can destroy the cellular structure of E.coli.

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Multimethods and Underlying Mechanism for Realizing Uniform Discharge From Patterned Structures by Varying Controlling Parameters

Cited by 2 publications

References 31 publications

Intermittent discharge in a complex stripe pattern in dielectric barrier discharge

Intermittent discharge in a complex stripe pattern in dielectric barrier discharge

Study of coaxial-dual-gap dielectric barrier discharge based on capillary: discharge characteristics and Escherichia coli decontamination

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