Close-Packed Arrays of Plasma Jets Emanating From Microchannels in a Transparent Polymer

Sun, Peter P.; Cho, J. H.; Park, C.-H; Park, S.-J; Eden, J. G.

doi:10.1109/tps.2012.2218130

Cited by 28 publications

(20 citation statements)

References 16 publications

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“…Figure B shows voltage‐current curve (V‐I) characteristics of the devices with different microchannel diameters, and higher power loading was achieved for the device with smaller diameter as the same trend as other microcavity plasma devices (Eden et al ., ; Eden and Park, ), while the channel diameter increases the current and the length of the emanating jet into the air. The stability of the microplasma jets was optimized by the gas feed pressures (Sun et al ., ).…”

Section: Resultsmentioning

confidence: 97%

“…Researchers at the University of Illinois and Hallym University have been collaborating for the development of a large‐scale array of microplasma jet devices in the application of non‐invasive clinical treatment, including wound healing (Lee et al ., ; Sun et al ., ). 'Microplasma' or 'microcavity plasma' is a term for the spatial confinement of a non‐equilibrium plasma to micrometer‐scale dimensions operating at atmospheric gas pressure.…”

Section: Introductionmentioning

confidence: 97%

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An experimental burn wound-healing study of non-thermal atmospheric pressure microplasma jet arrays

Lee

Khang

et al. 2015

J Tissue Eng Regen Med

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In contrast with a thermal plasma surgical instrument based on coagulative and ablative properties, low-temperature (non-thermal) non-equilibrium plasmas are known for novel medicinal effects on exposed tissue while minimizing undesirable tissue damage. In this study we demonstrated that arrays of non-thermal microplasma jet devices fabricated from a transparent polymer can efficiently inactivate fungi (Candida albicans) as well as bacteria (Escherichia coli), both in vitro and in vivo, and that this leads to a significant wound-healing effect. Microplasma jet arrays offer several advantages over conventional single-jet devices, including superior packing density, inherent scalability for larger treatment areas, unprecedented material flexibility in a plasma jet device, and the selective generation of medically relevant reactive species at higher plasma densities. The therapeutic effects of our multi-jet device were verified on second-degree burns in animal rat models. Reduction of the wound area and the histology of the wound after treatment have been investigated, and expression of interleukin (IL)-1α, -6 and -10 was verified to evaluate the healing effects. The consistent effectiveness of non-thermal plasma treatment has been observed especially in decreasing wound size and promoting re-epithelialization through collagen arrangement and the regulation of expression of inflammatory genes.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

An experimental burn wound-healing study of non-thermal atmospheric pressure microplasma jet arrays

Lee

Khang

et al. 2015

J Tissue Eng Regen Med

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“…Plasma arrays containing multiple individual jets close to each other are used to increase the treatment area. For instance, one-dimensional (1D) and two-dimensional (2D) jet arrays have been developed [10][11][12][13][14][15][16] and a few of them have been applied in materials processing and plasma biomedicine with satisfactory results. [15][16][17] In a single plasma jet, the effects of fluid field, electrical field, and device structure on the electrical characteristics, propagation dynamics, and plume length have been widely investigated with optical and electrical diagnosis, ICCD imaging, and Schlieren photography.…”

Section: Introductionmentioning

confidence: 99%

Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Liu

Zhang

Fang

et al. 2017

Plasma Processes & Polymers

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Atmospheric Pressure Plasma Jet (APPJ) arrays are considered as one of the most promising methods for uniform plasma processing of large uneven surfaces. To improve the downstream uniformity and enhance the surface treatment effects, it is important to reveal the mechanisms of the jet‐to‐jet interactions of plasma plumes in the jet array. In this paper, the electrical, optical, and fluid characteristics of the He and Ar three‐channel one‐dimensional (1D) plasma jet arrays with cross‐field needle‐ring electrode structure are studied and compared. It is found that there are divergences in the outside plumes of the propagation trajectory by the repellency of the plasma bullets and the spatial uniformity of the He and Ar plasma jet arrays can be improved with a lower applied voltage and a higher gas flow rate. The deflection angle of side plumes with respect to the central one of He is larger than that of Ar jet array due to the lighter molecular weight and better discharge synchronization. The experimental results show that Ar jet array is more controllable and stable and is more suitable for the design of the practical, simpler, and cheaper scalable plasma jet arrays.

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“…Arrays of microplasma jets are generated in a microchannel/electrode structure similar to those described previously [14]. As illustrated in figure 1(a), microchannels 400 μm in diameter are defined by quartz capillaries having a length of 10 mm and a wall thickness of 50 μm.…”

Section: Experimental Methods and Devicesmentioning

confidence: 99%

“…Furthermore, the directed velocity of the atoms in the jets is presumed to be responsible for the narrow spectral response of the filter, in contrast with previous PPCs involving a static gas medium. Based on 5 × 10 arrays of 400 μm diameter microplasma jets [14], these devices are the first of several under development at Illinois in the 150 -160 GHz interval. This spectral region was selected primarily because, for λ ~ 2 mm, solid state oscillators currently generate CW powers from 10 mW to several hundred mW.…”

Section: Introductionmentioning

confidence: 99%

Narrowband attenuation at 157 GHz by a plasma photonic crystal

Yang

Park

Eden³

2017

J. Phys. D: Appl. Phys.

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A plasma photonic crystal operating as a notch filter at 157 GHz ( o) has been demonstrated. Comprising a 5 × 10 array of microplasma jets, having a pitch and jet diameter of 1 mm and 400 μm, respectively, this two-dimensional plasma crystal exhibits an unexpectedly narrow stopband (Δ o = 1.0 GHz FWHM = 0.6 % o) and a maximum, time-averaged attenuation of 5 % at 157.0 GHz. Simulations accurately predict the position of line center, and the assumption of a time-averaged electron density of 3 × 10 13 cm -3 is necessary for the predicted magnitude of peak attenuation (at 157 GHz) to be in agreement with experiment. Reconfigurable plasma photonic crystals, synthesized from microcavity plasmas and providing electromagnetic functionality in the 100 GHz -1 THz spectral region (300 μm ≤ λ ≤ 3 mm), are now feasible.

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Close-Packed Arrays of Plasma Jets Emanating From Microchannels in a Transparent Polymer

Cited by 28 publications

References 16 publications

An experimental burn wound-healing study of non-thermal atmospheric pressure microplasma jet arrays

An experimental burn wound-healing study of non-thermal atmospheric pressure microplasma jet arrays

Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Narrowband attenuation at 157 GHz by a plasma photonic crystal

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