Electron density in surface barrier discharge emerging at argon/water interface: quantification for streamers and leaders

Cvetanović, Nikola; Galmiz, Oleksandr; Synek, Petr; Zemánek, Miroslav; Brablec, Antonı́n; Hoder, Tomáš

doi:10.1088/1361-6595/aaa578

Cited by 14 publications

(16 citation statements)

References 44 publications

(75 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is clear from a comparison of the peak electron densities that the effective pulsed waveform yields an electron density two orders of magnitude higher than that achieved with the sinusoidal waveform. Notably, the densities calculated for the pulsed case are closer to those reported for streamers in an air plasma [36][37][38], compared to those calculated for the sinusoidal case.…”

Section: Sinusoidal Versus Effective Excitation Of the Modelsupporting

confidence: 68%

Dominant heating mechanisms in a surface barrier discharge

Gilbart

Dickenson

Walsh

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

In computational models of atmospheric pressure surface barrier discharges (SBDs) the role of heating of the dielectric material and the quiescent gas is often neglected, impacting the accuracy of the calculated chemical kinetics. In this contribution, a two-dimensional fluid model of an SBD was developed and experimentally validated to determine the relative contribution of the dominant heat transfer mechanisms and to quantify the impact of discharge heating on the resultant chemistry. Three heating mechanisms were examined, including electron heating of the background gas due to inelastic collisions, ion bombardment of the dielectric surface and dielectric heating by the time-varying electric field. It was shown that electron heating of the background gas was not significant enough to account for the experimentally observed increase in temperature of the dielectric material, despite being the dominant heating mechanism of the gas close to the electrode. Dielectric heating was ruled out as the frequency response of typical dielectric materials used in SBD devices does not overlap with the experimentally observed power spectrum of an SBD excited at kHz frequencies. The ionic flux heating was found to be the dominant heating mechanism of the dielectric material and the downstream flow driven by the SBD. The largest impact of plasma heating on discharge chemistry was found in reactive nitrogen species (RNS) production, where the densities of RNSs increased when an appropriate treatment of heating was adopted. This had a marked effect on the discharge chemistry, with the concentration of NO2 increasing by almost 50% compared to the idealized constant temperature case.

show abstract

Section: Sinusoidal Versus Effective Excitation Of the Modelsupporting

confidence: 68%

Dominant heating mechanisms in a surface barrier discharge

Gilbart

Dickenson

Walsh

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…The surface discharge on the liquid surface usually has electron density on the order of 10 16 /cm 3 and electron energy over 10 eV . This strong surface discharge results in the formation of a plasma–liquid interface with a depth on the micrometer scale.…”

Section: Results and Discussionmentioning

confidence: 99%

Plasma Activated Oil: Fast Production, Reactivity, Stability, and Wound Healing Application

Zou

Pan

et al. 2019

ACS Biomater. Sci. Eng.

View full text Add to dashboard Cite

The “third-generation” cooking oil based drug, named plasma activated oil (PAO), is produced in cheap olive oil by a single-step, room temperature, energy-efficient, and environment-friendly dry plasma-enabled process. The streamer-surface discharge generates abundant energetic species, atomic oxygen at the plasma–oil interface. The otherwise challenging dissociation of CC double bonds by energetic species and oxidation by the plasma generated atomic oxygen is the key mechanism to produce the H2O2 active species and carboxylic acid in the PAO. It is shown that the peroxide value and acid value of PAO are 7.5 times and 57% higher than those of the traditional ozonated oil, respectively. Different from plasma activated water whose shelf life was less than 1 week, PAO could be stored at room temperature for at least 3 months, and a shelf life of up to 1 year is expected. We further reveal that the PAO can not only sterilize the wound, but also promote more release of growth factor such as VEGF and CD34; therefore, the wound healing of PAO is 28.5% faster than that of the control group.

show abstract

“…For completeness, other approaches for electrical diagnostics of DBD should be mentioned: for example, statistical methods based on detailed analysis of the shapes of the current pulses measured in a DBD driven by sinusoidal voltage [24,26,27], modeling of the discharge processes [28][29][30], the simulation of the measured characteristics by defining the properties of lumped electrical elements of the equivalent circuit in XCOS/Scilab or the Simulink environment [31][32][33][34], or optical measurements of the electric field [35][36][37] and electron densities [38,39].…”

Section: Discussionmentioning

confidence: 99%

The Equivalent Circuit Approach for the Electrical Diagnostics of Dielectric Barrier Discharges: The Classical Theory and Recent Developments

Pipa

Brandenburg

2019

Atoms

View full text Add to dashboard Cite

Measurements of current and voltage are the basic diagnostics for electrical discharges. However, in the case of dielectric barrier discharges (DBDs), the measured current and voltage waveforms are influenced by the discharge reactor geometry, and thus, interpretation of measured quantities is required to determine the discharge properties. This contribution presents the main stages of the development of electrical diagnostics of DBDs, which are based on lumped electrical elements. The compilation and revision of the contributions to the equivalent circuit approach are targeted to indicate: (1) the interconnection between the stage of development, (2) its applicability, and (3) the current state-of-the-art of this approach.

show abstract

Electron density in surface barrier discharge emerging at argon/water interface: quantification for streamers and leaders

Cited by 14 publications

References 44 publications

Dominant heating mechanisms in a surface barrier discharge

Dominant heating mechanisms in a surface barrier discharge

Plasma Activated Oil: Fast Production, Reactivity, Stability, and Wound Healing Application

The Equivalent Circuit Approach for the Electrical Diagnostics of Dielectric Barrier Discharges: The Classical Theory and Recent Developments

Contact Info

Product

Resources

About