Hybrid and Fluid Modeling of Ion Activation Energy and Reactive Fluxes to Particulates Suspended in Air and Residing on Surfaces

Babaeva, Natalia Yu

doi:10.1002/ppap.201600165

Cited by 3 publications

(3 citation statements)

References 128 publications

(183 reference statements)

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“…In our prior studies [25][26][27] we showed that atmospheric pressure DBDs can produce pulses of energetic ions with energies reaching many tens of eV. For plasma jets it was generally assumed that the incident ions have near thermal energies.…”

Section: Discussionmentioning

confidence: 99%

“…Investigations aimed at the evaluation of the range of ion energies delivered by atmospheric pressure dielectric barrier discharges (DBDs) to surfaces [25][26][27] revealed that DBDs are able to deliver ions with energies of a few tens of eV. These large values mainly correspond to the treated surfaces having large ε/ε 0 and high conductivity.…”

Section: Introductionmentioning

confidence: 99%

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Ion energies delivered by negative and positive ionization waves to flat dielectric surfaces

Babaeva

Naidis

2020

Plasma Sources Sci. Technol.

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The information on typical values of ion energy and angular distributions (IEADs) on surfaces delivered by plasma jets is equally important for the plasma processing and plasma medicine. In this paper, we report on results from a 2D computational investigation of the IEADs when plasma jet interacts with a weakly conductive dielectric surface. The IEADs are computed using Monte Carlo techniques. The ion fluxes to surfaces are recorded simultaneously with IEADs. The results of this investigation suggest that ion energies on surfaces delivered by plasma jets can be rather high. In particular, we demonstrate that an ionization wave (IW) in plasma jets of positive cycle or pulse can produce ions with energies of a few eV. In case of negative IW the ions are almost thermalized.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ion energies delivered by negative and positive ionization waves to flat dielectric surfaces

Babaeva

Naidis

2020

Plasma Sources Sci. Technol.

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“…Babaeva (also Joint Institute for High Temperatures in Moscow) applies both hybrid and fluid modelling, using the nonPDPSIM modelling platform, to study the intersection of plasma filaments in a DBD with small polymer particulates, either suspended in air or residing on surfaces . The study might be relevant for applications in plasma medicine as well as plasma‐based surface treatment.…”

mentioning

confidence: 99%

Special issue on numerical modelling of low‐temperature plasmas for various applications — part II: Research papers on numerical modelling for various plasma applications

Bogaerts

Alves

2017

Plasma Processes & Polymers

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We present here part II of the special issue on "Numerical Modelling of Low-temperature Plasmas for Various Applications", which was divided in two parts, with each part organized as a double issue. The first double issue contained review and tutorial papers on the various modelling approaches and closely related topics, like model verification and validation, plasma-surface interaction modelling and input data for modelling. [1] In the present double issue, we give illustrations of the different modelling approaches for various applications.Low-temperature plasmas are extensively used for microelectronic applications. The two main plasma sources used for this purpose are inductively coupled plasmas (ICP) and capacitively coupled plasmas (CCP). This special issue contains a number of papers describing these two different plasma sources. Wen and colleagues from Dalian University of Technology, University of California and University of Antwerp apply a global (i.e., volume-averaged) bulk plasma model, coupled bi-directionally with a Monte Carlo (MC)/ fluid sheath model for an ICP operating in Ar/O 2 gas mixtures. [2] The model calculates the ion energy and angular distribution functions bombarding the rf-biased electrode for different bias voltages, pressures and coil powers. Mouchtouris and Kokkoris (National Center for Scientific Research (NCSR) "Demokritos" in Attica) present a multi-scale model for a low pressure ICP in Ar, based on a reactor scale model for describing the plasma behaviour, a MC particle tracing model to calculate the ion energy and angular distributions, and a MC surface model to calculate the evolution of surface morphology during the etching of a polymeric substrate. [3] This model allows linking the operating parameters of the plasma reactor with the evolution of the surface roughness. Stratakos, Zeniou and Gogolides, also working at NCSR "Demokritos", perform a full-wave three-dimensional electromagnetic analysis in vacuum to calculate and compare the electric/magnetic field components of different helical and helicon antennas used to generate ICPs. [4] This is important to select the appropriate antenna type for a plasma source.Large scale CCPs, operating at high frequencies, are studied by Eremin, Brinkmann and Mussenbrock (Ruhr-University

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Dielectric Barrier Plasma Discharge Exsolution of Nanoparticles at Room Temperature and Atmospheric Pressure

ul Haq,

Fanelli,

Bekris

et al. 2024

Advanced Science

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Exsolution of metal nanoparticles (NPs) on perovskite oxides has been demonstrated as a reliable strategy for producing catalyst‐support systems. Conventional exsolution requires high temperatures for long periods of time, limiting the selection of support materials. Plasma direct exsolution is reported at room temperature and atmospheric pressure of Ni NPs from a model A‐site deficient perovskite oxide (La0.43Ca0.37Ni0.06Ti0.94O2.955). Plasma exsolution is carried out within minutes (up to 15 min) using a dielectric barrier discharge configuration both with He‐only gas as well as with He/H2 gas mixtures, yielding small NPs (<30 nm diameter). To prove the practical utility of exsolved NPs, various experiments aimed at assessing their catalytic performance for methanation from synthesis gas, CO, and CH4 oxidation are carried out. Low‐temperature and atmospheric pressure plasma exsolution are successfully demonstrated and suggest that this approach could contribute to the practical deployment of exsolution‐based stable catalyst systems.

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Hybrid and Fluid Modeling of Ion Activation Energy and Reactive Fluxes to Particulates Suspended in Air and Residing on Surfaces

Cited by 3 publications

References 128 publications

Ion energies delivered by negative and positive ionization waves to flat dielectric surfaces

Ion energies delivered by negative and positive ionization waves to flat dielectric surfaces

Special issue on numerical modelling of low‐temperature plasmas for various applications — part II: Research papers on numerical modelling for various plasma applications

Dielectric Barrier Plasma Discharge Exsolution of Nanoparticles at Room Temperature and Atmospheric Pressure

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