Precise localization of DBD plasma streamers using topographically patterned insulators for maskless structural and chemical modification of surfaces

Polonskyi, Oleksandr; Hartig, Torge; Uzarski, Joshua R.; Gordon, Michael J.

doi:10.1063/5.0071460

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…Electrical and electronic components used in aerospace applications are more susceptible to discharge effects due to lower streamer initiation voltages [6]. Additionally, altering the N 2 /O 2 ratio in air also affects streamer characteristics, and these mixed gases have been applied in fields such as gas cleaning [7,8], ozone generation [9,10], and surface treatment [11,12].…”

Section: Introductionmentioning

confidence: 99%

Study on the effects of medium-low pressure and oxygen concentration on positive streamer based on a two-dimensional fluid model

Chen,

Yang,

Wei

et al. 2024

J. Phys. D: Appl. Phys.

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We studied positive streamers with a 5 mm gap under 20–101 kPa pressure and 1%–31% O2 concentrations conditions using a 2D axisymmetric fluid model based on local field approximation. As the pressure decreases from 101 kPa to 20 kPa, the axial reduced electric field, the mean electron energy and the electron diffusion coefficient increase, which leads to the acceleration of the streamer propagation velocity and the increase of the streamer channel radius. The opposite change of ionization cross section and gas molecular density caused by the decrease of pressure leads to the non-monotonic change of the peak of net ionization rate. At medium-low pressure, there is a wider ionization region at the streamer head. As the O2 concentration decreases from 31% to 1% in N2/O2, the streamer propagation velocity decreases. When the O2 concentration drops to 1%, the streamer velocity decreases with a descent gradient of nearly 4 times, compared to 11% O2. Based on the space charge effect and chemical reaction rate, a possible mechanism is proposed to explain the abrupt change in the streamer velocity.

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Section: Introductionmentioning

confidence: 99%

Study on the effects of medium-low pressure and oxygen concentration on positive streamer based on a two-dimensional fluid model

Chen,

Yang,

Wei

et al. 2024

J. Phys. D: Appl. Phys.

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“…Streamer discharges are used for many plasma chemical applications such as air purification or ozone production [4][5][6][7], removal of nitrogen oxides [8][9][10], * Author to whom any correspondence should be addressed. liquid treatment [11,12], surface modification [13,14], plasma medicine [15,16] and plasma assisted combustion [17,18].…”

Section: Introductionmentioning

confidence: 99%

A computational study on the energy efficiency of species production by single-pulse streamers in air

Guo¹,

Teunissen²

2023

Plasma Sources Sci. Technol.

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We study the energy efficiency of species production by streamer discharges with a single voltage pulse in atmospheric dry air, using a 2D axisymmetric fluid model. Sixty different positive streamers are simulated by varying the electrode geometry, the pulse duration and the applied voltage. Between these cases, the streamer radius and velocity vary by about an order of magnitude, but the variation in the maximal electric field is significantly smaller, about 30%. We find that G-values for the production of N(4S), O(3P), NO and N2O, which have relatively high activation energies, vary by about 30% to 60%. This variation is mainly caused by two factors: differences in the fraction of energy deposited in the streamer head region, and differences in the maximal electric field at the streamer head. When accounting for both factors, our computed G-values are in good agreement with an analytic estimate proposed by Naidis (2012 Plasma Sources Sci. Technol. 21 042001). We also simulate negative streamers and find that their production of N(4S), O(3P) and NO is less energy efficient. The results suggest that energy efficiency can be increased by reducing Joule heating in the streamer channel and by increasing the maximal electric field at the streamer head, for example by using short voltage pulses with a high applied voltage.

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“…Streamer discharges in N 2 /O 2 mixtures at atmospheric pressure have been widely used in various fields [1], including surface treatment [2,3], plasma-assisted combustion [4], plasma biomedicine [5,6], and air purification [7,8]. Most of these applications rely on chemically active species, mostly generated through energetic electron collisions with * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Temporal evolution and mechanism of secondary streamers in N₂/O₂ mixtures at atmospheric pressure under DC voltage

Zheng,

Sun,

et al. 2023

J. Phys. D: Appl. Phys.

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In this work, the temporal evolution of secondary streamers in N2/O2 mixtures at atmospheric pressure under DC voltage were investigated using a two-dimensional axisymmetric fluid model. The effects of voltage amplitude, polarity and oxygen concentration were analyzed. The propagation of secondary streamers is divided into two stages: fast propagation followed by slow propagation. The interior of secondary streamers is filled with positive space charges, while the exterior contains negative space charges. The reduced electric field in the secondary streamer is initially linearly proportional to the applied voltage and decreases linearly with the length of secondary streamers. The length of secondary streamers is primarily determined by the applied voltage, regardless of the oxygen concentration. A reversed propagation direction is simulated under negative applied voltage. We propose a different mechanism for secondary streamers. The high-density positive charge layer near the electrode initiates the propagation of secondary streamers, and the extension of positive charge region dominates the propagation. The distribution of electric field along the channel is mainly determined by the distribution of net space charge. The propagation direction is opposite to the direction of electron drift. The secondary streamer eventually stagnates due to the decrease in electron density in high oxygen concentration, while it is caused by the uniform current density at the front of the secondary streamer in low oxygen concentration.

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Precise localization of DBD plasma streamers using topographically patterned insulators for maskless structural and chemical modification of surfaces

Cited by 10 publications

References 33 publications

Study on the effects of medium-low pressure and oxygen concentration on positive streamer based on a two-dimensional fluid model

Study on the effects of medium-low pressure and oxygen concentration on positive streamer based on a two-dimensional fluid model

A computational study on the energy efficiency of species production by single-pulse streamers in air

Temporal evolution and mechanism of secondary streamers in N₂/O₂ mixtures at atmospheric pressure under DC voltage

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Precise localization of DBD plasma streamers using topographically patterned insulators for maskless structural and chemical modification of surfaces

Cited by 10 publications

References 33 publications

Study on the effects of medium-low pressure and oxygen concentration on positive streamer based on a two-dimensional fluid model

Study on the effects of medium-low pressure and oxygen concentration on positive streamer based on a two-dimensional fluid model

A computational study on the energy efficiency of species production by single-pulse streamers in air

Temporal evolution and mechanism of secondary streamers in N2/O2 mixtures at atmospheric pressure under DC voltage

Contact Info

Product

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Temporal evolution and mechanism of secondary streamers in N₂/O₂ mixtures at atmospheric pressure under DC voltage