Influence of Gas Flow Rate on Plasma Parameters Produced by a Plasma Jet and its Spectroscopic Diagnosis Using the OES Technique

Aadim, Kadhim A.; Mazhir, Sabah N.; Abdalameer, Nisreen Kh.; Ali, Alyaa H.

doi:10.1088/1757-899x/987/1/012020

Cited by 26 publications

(13 citation statements)

References 20 publications

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“…The plasma glow volume was observed to increase with flow velocities in the experiments (less than 10 mm along the plasma tube). Although the plasma parameters listed in table 1 were not sensitive to flow velocities in the Langmuir probe measurement, several studies on atmospheric pressure plasma jet have observed that flow velocity can affect plasma geometry and plasma parameters in the plasma bulk [42][43][44]. As illustrated by figures 7 and S4, when plasma parameters are changed, simulated particle charge distributions differ given a constant residence time.…”

Section: Numerical Modeling Resultsmentioning

confidence: 98%

Particle charge distributions in the effluent of a flow-through atmospheric pressure low temperature plasma

Husmann¹,

Thimsen²,

Chen³

2021

Plasma Sources Sci. Technol.

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Atmospheric pressure low-temperature plasmas are often utilized to perform particle synthesis, treatment, and removal. It is well-known that dust particles are highly negatively charged in these plasmas; however, little is known about dust particle charging behavior as particles leave the plasma volume and pass through the spatial afterglow region. In this work, monodisperse particles of various sizes and work functions were introduced into an atmospheric pressure radiofrequency capacitively coupled flow-through plasma. Dust particle electrical mobility distributions downstream of the flow-through plasma were measured utilizing a differential mobility analyzer in conjunction with a condensation particle counter at various gas flow velocities. Charge distributions were determined from the measured electrical mobility distributions. Experiments confirm that particles become less negatively charged, and even net-positively charged after leaving the plasma volume, with a distribution that follows a shifted Boltzmann charge distribution. Additionally, particle charge in the effluent of the flow-through plasma is negligibly dependent on work function but highly size and flow velocity dependent. Larger particles were shown to have a higher magnitude of charge under all studied conditions; however, particle polarity was switchable by varying gas flow velocity. The charging dynamics were simulated utilizing a constant number Monte Carlo model that accounts for electron temperature decay and the transition from ambipolar to free diffusion of electrons and ions in the spatial afterglow. Simulation results also suggest that, at the same flow velocity, larger particles obtain a greater magnitude of charge, negative or positive. The decrease in electron mobility and the difference between ion and electron convective loss rates create an ion-rich region in the plasma effluent that promotes ion–particle collisions and drives particle charge removal and even reversal of polarity. Larger particles more favorably collide with energetic species in these environments, which results in higher charge states.

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Section: Numerical Modeling Resultsmentioning

confidence: 98%

Particle charge distributions in the effluent of a flow-through atmospheric pressure low temperature plasma

Husmann¹,

Thimsen²,

Chen³

2021

Plasma Sources Sci. Technol.

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“…The bandgap energy of films near the absorption edge was determined using the Tauce method through the following formula 17 where α is the linear absorption coefficient, B is a constant, hν is the photon energy, and Eg is the bandgap energy for NPs with direct and indirect bandgap energy. It is possible to calculate Eg of the film by plotting (αhν)2 versus hν and extrapolating the straight line to the photon energy axis.…”

Section: Ultra Violet Spectroscopic Analysis Of Znsementioning

confidence: 99%

Cytotoxic activity of Green Zinc Selenide Nanoparticles Against Hep-G2 Cell Lines

2021

IJFMT

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In the current study a new technique between the plasma physics, nanoparticle and Biotechnology,structured (ZnSe) prepared by cold plasma technique using atmospheric pressure plasmajet system, Znse NPs were prepared from selenium nitrate and zinc metal sheets to reduce selenium toxicity. The structural and optical properties were characterized by X-ray diffraction (XRD) and absorbance measurements of ZnSe green NPs. The liver cancer cell line (hepG2) was exposed to the ZnSe nanoparticles, and The percentage of cytotoxicity was suppressed after 24, and48 from exposure, induced cytotoxicity is found to be 70.3% in hepG2 after exposed 48h ZnSe green nanoparticle, and the maximum cytotoxicity of the normal cell line (REF) was also examined 42.62% when exposure ZnSe nanoparticles and 16.6% when exposure ZnSe green nanoparticles.

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“…The primary mechanism for PLAL nanomaterial fabrication can be illustrated as follows: laser-matter interaction (absorption of a laser pulse by a material); the formation, expansion, and cooling of a plasma plume; the generation of shock waves; and the formation, expansion, and collapse of bubbles in a liquid medium 14 – 17 . While in the plasma jet technique a wide range of reactive oxygen and nitrogen species (RONS) produced by atmospheric pressure non-thermal plasma sources is crucial to this application 22 , 29 . Since plasma-generated RONS alter the chemical makeup of a liquid, plasma-liquid interactions are crucial in the production of nanomaterials 29 – 33 .…”

Section: Introductionmentioning

confidence: 99%

“…While in the plasma jet technique a wide range of reactive oxygen and nitrogen species (RONS) produced by atmospheric pressure non-thermal plasma sources is crucial to this application 22 , 29 . Since plasma-generated RONS alter the chemical makeup of a liquid, plasma-liquid interactions are crucial in the production of nanomaterials 29 – 33 . Ozone, singlet oxygen, hydrogen peroxide, hydroxyl radicals, and nitric oxide are just a few of the common RONS that are created during plasma-liquid interactions 8 , 34 .…”

Section: Introductionmentioning

confidence: 99%

A novel method for ZnO@NiO core–shell nanoparticle synthesis using pulse laser ablation in liquid and plasma jet techniques

Imran

Hubeatir

Aadim

2023

Sci Rep

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Given their versatile nature and wide range of possible applications, core–shell nanoparticles (NPs) have received considerable attention. This paper proposes a novel method for synthesizing ZnO@NiO core–shell nanoparticles using a hybrid technique. The characterization demonstrates the successful formation of ZnO@NiO core–shell nanoparticles, which have an average crystal size of 13.059 nm. The results indicate that the prepared NPs have excellent antibacterial activity against both Gram-negative and Gram-positive bacteria. This behavior is primarily caused by the accumulation of ZnO@NiO NPs on the bacteria's surface, which results in cytotoxic bacteria and a relatively increased ZnO, resulting in cell death. Moreover, the use of a ZnO@NiO core–shell material will prevent the bacteria from nourishing themselves in the culture medium, among many other reasons. Finally, the PLAL is an easily scalable, cost-effective, and environmentally friendly method for the synthesis of NPs, and the prepared core–shell NPs could be used in other biological applications such as drug delivery, cancer treatment, and further biomedical functionalization.

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Influence of Gas Flow Rate on Plasma Parameters Produced by a Plasma Jet and its Spectroscopic Diagnosis Using the OES Technique

Cited by 26 publications

References 20 publications

Particle charge distributions in the effluent of a flow-through atmospheric pressure low temperature plasma

Particle charge distributions in the effluent of a flow-through atmospheric pressure low temperature plasma

Cytotoxic activity of Green Zinc Selenide Nanoparticles Against Hep-G2 Cell Lines

A novel method for ZnO@NiO core–shell nanoparticle synthesis using pulse laser ablation in liquid and plasma jet techniques

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