Properties of Atmospheric Pressure Glow Discharge With Liquid Electrolyte Cathode

Титов, В. А.; Рыбкин, В. В.; Smirnov, S. A.; Kulentsan, A. L.; Choi, Ho‐Suk

doi:10.1615/hightempmatproc.v11.i4.40

Cited by 9 publications

(7 citation statements)

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“…Titov et al also used measurements of the cathode fall to estimate a γ between 10 −5 and 10 −4 in pure water, which increased to 10 −3 at high salt concentrations. 49 Our measurements and analysis indicate that not many emitted electrons are required to sustain the plasma and that very few electrons are emitted for each positive ion that bombards the aqueous solution. This result follows the trend of lower γ values when the band gap of the cathode grows larger from metals to semiconductors to dielectrics, where the most similar would be a dielectric.…”

Section: ■ Results and Discussionmentioning

confidence: 87%

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Chemical Analysis of Secondary Electron Emission from a Water Cathode at the Interface with a Nonthermal Plasma

et al. 2020

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When a nonthermal plasma and a liquid form part of the same circuit, the liquid may function as a cathode, in which case electrons are emitted from the liquid into the gas to sustain the plasma. As opposed to solid electrodes, the mechanism of this emission has not been established for a liquid, even though various theories have attempted to explain it via chemical processes in the liquid phase. In this work, we tested the effects of the interfacial chemistry on electron emission from water, including the role of pH as well as the hydroxyl radical, the hydrogen atom, the solvated electron, and the presolvated electron; it was found that none of these species are critical to sustain the plasma. We propose an emission mechanism where electrons, generated from ionized water molecules in the uppermost monolayers of solution, are emitted into the plasma directly from the conduction band of the water.

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Section: ■ Results and Discussionmentioning

confidence: 87%

“…They reported γ ∼ 10 –4 , something much closer to our result. Titov et al also used measurements of the cathode fall to estimate a γ between 10 –5 and 10 –4 in pure water, which increased to 10 –3 at high salt concentrations …”

Section: Resultsmentioning

confidence: 94%

Chemical Analysis of Secondary Electron Emission from a Water Cathode at the Interface with a Nonthermal Plasma

et al. 2020

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“…For aqueous solutions, the ion-induced secondary electron emission coefficient can be found in a few reports for the case of glow discharge electrolysis. 57,[317][318][319][320] In the review, 57 for instance, Bruggeman et al mention a value range around c % 10 À3 À 10 À4 , which is 2 to 3 orders of magnitude smaller than for metal electrodes. These values are calculated from the cathode potential drop, by applying the standard model of glow discharge between metal electrodes.…”

Section: B Surface Ion Release: Surfing On Capillary Waves and Taylomentioning

confidence: 99%

Plasma physics of liquids—A focused review

Vanraes

Bogaerts

2018

Applied Physics Reviews

181

118

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The interaction of plasma with liquids has led to various established industrial implementations as well as promising applications, including high-voltage switching, chemical analysis, nanomaterial synthesis, and plasma medicine. Along with these numerous accomplishments, the physics of plasma in liquid or in contact with a liquid surface has emerged as a bipartite research field, for which we introduce here the term "plasma physics of liquids." Despite the intensive research investments during the recent decennia, this field is plagued by some controversies and gaps in knowledge, which might restrict further progress. The main difficulties in understanding revolve around the basic mechanisms of plasma initiation in the liquid phase and the electrical interactions at a plasma-liquid interface, which require an interdisciplinary approach. This review aims to provide the wide applied physics community with a general overview of the field, as well as the opportunities for interdisciplinary research on topics, such as nanobubbles and the floating water bridge, and involving the research domains of amorphous semiconductors, solid state physics, thermodynamics, material science, analytical chemistry, electrochemistry, and molecular dynamics simulations. In addition, we provoke awareness of experts in the field on yet underappreciated question marks. Accordingly, a strategy for future experimental and simulation work is proposed.

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“…Liquid cathode discharge glowing suggests emission of electrons from the electrolyte solution. Measurement of electrolyte cathode potentials and evaluation of electron gemission coefficients in terms of the classical theory of cathode voltage drop showed that the emission coefficients for such cathodes lower by an order of magnitude compared to the respective values for metal cathodes under low-pressure glow discharge conditions [80][81][82][83]; however, ion bombardment of the surface of an electrolyte cathode gives rise to cathode sputtering, a process involving nonequilibrium transfer of solution components to the plasma zone. The transfer coefficients of solvents and solutes from aqueous salt solutions are reported in [83][84][85].…”

Section: Influence Of Processes At the Discharge-solution Interface Imentioning

confidence: 99%

Influence of heterogeneous physicochemical processes on the parameters of low-temperature plasma

2015

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Properties of Atmospheric Pressure Glow Discharge With Liquid Electrolyte Cathode

Cited by 9 publications

References 0 publications

Chemical Analysis of Secondary Electron Emission from a Water Cathode at the Interface with a Nonthermal Plasma

Chemical Analysis of Secondary Electron Emission from a Water Cathode at the Interface with a Nonthermal Plasma

Plasma physics of liquids—A focused review

Influence of heterogeneous physicochemical processes on the parameters of low-temperature plasma

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