Diagnostics of dielectric barrier discharges in noble gases: atmospheric pressure glow and pseudoglow discharges and spatio-temporal patterns

Radu, I.; Bartnikas, R.; Czeremuszkin, G.; Wertheimer, M. R.

doi:10.1109/tps.2003.811647

Cited by 139 publications

(111 citation statements)

References 31 publications

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“…Here, the required increase in the strength of the electric field can depend upon the presence of helium metastables that are present following the previous activation [55]. Similar behavior has previously been observed in kilohertz-driven atmospheric-pressure barrier discharges [56,57].…”

Section: Characterization Of the Optical Emissionsupporting

confidence: 73%

Microplasma Array Patterning of Reactive Oxygen and Nitrogen Species onto Polystyrene

Szili

Dedrick

et al. 2017

Front. Phys.

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We investigate an approach for the patterning of reactive oxygen and nitrogen species (RONS) onto polystyrene using atmospheric-pressure microplasma arrays. The spectrally integrated and time-resolved optical emission from the array is characterized with respect to the applied voltage, applied-voltage frequency and pressure; and the array is used to achieve spatially resolved modification of polystyrene at three pressures: 500, 760, and 1000 Torr. As determined by time-of-flight secondary ion mass spectrometry (ToF-SIMS), regions over which surface modification occurs are clearly restricted to areas that are exposed to individual microplasma cavities. Analysis of the negative-ion ToF-SIMS mass spectra from the center of the modified microspots shows that the level of oxidation is dependent on the operating pressure, and closely correlated with the spatial distribution of the optical emission. The functional groups that are generated by the microplasma array on the polystyrene surface are shown to readily participate in an oxidative reaction in phosphate buffered saline solution (pH 7.4). Patterns of oxidized and chemically reactive functionalities could potentially be applied to the future development of biomaterial surfaces, where spatial control over biomolecule or cell function is needed.

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Section: Characterization Of the Optical Emissionsupporting

confidence: 73%

Microplasma Array Patterning of Reactive Oxygen and Nitrogen Species onto Polystyrene

Szili

Dedrick

et al. 2017

Front. Phys.

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“…3,8 In contrast, their sinusoidal character is distinctly different from the pulselike current wave form of conventional kilohertz atmospheric DBD. 13,14 Also shown in Fig. 1 barriers, Fig.…”

mentioning

confidence: 89%

Mitigating plasma constriction using dielectric barriers in radio-frequency atmospheric pressure glow discharges

Shi¹,

Liu²,

Kong³

2007

Applied Physics Letters

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It is known that radio-frequency (rf) atmospheric glow discharges with bare electrodes are susceptible to plasma constriction at large discharge currents. This is undesirable for large-scale applications, even though large currents usually lead to abundant plasma reactive species and high application efficiency. In this letter, an experimental investigation is presented to demonstrate that plasma constriction can be mitigated by introducing dielectric barriers to the electrodes. The resulting atmospheric rf dielectric-barrier discharge is shown to operate in the γ mode of large discharge current while maintaining its discharge volume. This improves significantly plasma stability and the application potential.

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“…In the past, dielectric insulation of electrodes has been widely believed to be necessary for APGD at kilohertz but not at megahertz. [4][5][6][7][8][9][10][11][12] Our study is based on a one-dimensional, self-consistent, and continuum model originally developed for rf APGD that has achieved excellent agreement with experimental data. 12 We consider rf DBD in atmospheric helium.…”

mentioning

confidence: 92%

“…[4][5][6][7][8][9][10][11] Of the many recent fundamental APGD studies in literature, a key focus has been different APGD modes 7,9,[12][13][14] and their influence on plasma stability, particularly in radio-frequency ͑rf͒ APGDs. This is important, since atmospheric gas discharges are inherently susceptible to the glow-to-arc transition and an adequate plasma stability in APGDs is often attained at the expense of their application efficiency.…”

mentioning

confidence: 99%

“…This is very different from atmospheric DBD generated at kilohertz frequencies, of which the discharge current and the memory voltage are both distinctively nonsinusoidal. 4,5 In particular, the discharge current in kilohertz DBD is of very short pulses with its pulse width much smaller than the half-period of the applied voltage. 4,5 The peak applied voltage of the rf DBD is 450.0 V in Fig.…”

mentioning

confidence: 99%

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Plasma stability control using dielectric barriers in radio-frequency atmospheric pressure glow discharges

Shi

Liu

Kong

2006

Applied Physics Letters

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It is widely accepted that electrode insulation is unnecessary for generating radio-frequency (rf) atmospheric pressure glow discharges (APGDs). It is also known that rf APGDs with large discharge current are susceptible to the glow-to-arc transition. In this letter, a computational study is presented to demonstrate that dielectric barriers provide an effective control over unlimited current growth and allow rf APGDs to be operated at very high current densities with little danger of the glow-to-arc transition. Characteristics of electrode sheaths are used to show that the stability control is achieved by forcing the plasma-containing electrode unit to acquire positive differential conductivity.

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Diagnostics of dielectric barrier discharges in noble gases: atmospheric pressure glow and pseudoglow discharges and spatio-temporal patterns

Cited by 139 publications

References 31 publications

Microplasma Array Patterning of Reactive Oxygen and Nitrogen Species onto Polystyrene

Microplasma Array Patterning of Reactive Oxygen and Nitrogen Species onto Polystyrene

Mitigating plasma constriction using dielectric barriers in radio-frequency atmospheric pressure glow discharges

Plasma stability control using dielectric barriers in radio-frequency atmospheric pressure glow discharges

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