Electron temperature and density of non-thermal atmospheric pressure argon plasma jet by convective wave packet model

Suanpoot, Pradoong; Hong, Young June; Ghimire, Bhagirath; Cho, Guangsup; Uhm, Han S.; Kim, Doyoung; Kim, Yun Ji; Choi, Eun Ha

doi:10.3938/jkps.70.979

Cited by 24 publications

(9 citation statements)

References 29 publications

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“…Electron densities of J1, J2, and J3 jets were

, and

electrons/m

, respectively. The collisional radiative model [ 33 ] and the convective wave packet model [ 34 ] were used to compute electron temperature and density, respectively.…”

Section: Experimental Methodsmentioning

confidence: 99%

Influences of Plasma Plume Length on Structural, Optical and Dye Degradation Properties of Citrate-Stabilized Silver Nanoparticles Synthesized by Plasma-Assisted Reduction

2022

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Citrate-capped silver nanoparticles Ag@Cit NPs were synthesized by a simple plasma-assisted reduction method. Homogenous colloidal Ag@Cit NPs solutions were produced by treating a AgNO3-trisodium citrate-deionized water with an atmospheric-pressure argon plasma jet. The plasma-synthesized Ag@Cit NPs exhibited quasi-spherical shape with an average particle diameter of about 5.9−7.5 nm, and their absorption spectra showed surface plasmon resonance peaks at approximately 406 nm. The amount of Ag@Cit NPs increased in a plasma exposure duration-dependent manner. Plasma synthesis of Ag@Cit NPs was more effective in the 8.5 cm plume jet than in the shorter and longer plume jets. A larger amount of Ag@Cit NPs were produced from the 8.5 cm plume jet with a higher pH and a larger number of aqua electrons, indicating that the synergetic effect between plasma electrons and citrate plays an important role in the plasma synthesis of Ag@Cit NPs. Plasma-assisted citrate reduction facilitates the synthesis of Ag@Cit NPs, and citrate-capped nanoparticles are stabilized in an aqueous solution due to their repulsive force. Next, we demonstrated that plasma-synthesized Ag@Cit NPs exhibited a significant degradation of methylene blue dye.

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“…Electron densities of J1, J2, and J3 jets were

, and

electrons/m

, respectively. The collisional radiative model [ 33 ] and the convective wave packet model [ 34 ] were used to compute electron temperature and density, respectively.…”

Section: Experimental Methodsmentioning

confidence: 99%

Influences of Plasma Plume Length on Structural, Optical and Dye Degradation Properties of Citrate-Stabilized Silver Nanoparticles Synthesized by Plasma-Assisted Reduction

2022

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“…[8] This value is consistent with the observations in similar plasmas reported earlier. [25,26] High species density of atmospheric pressure plasma results in rapid loss of energy of the electrons through collision with neutrals and charged species.…”

Section: Plasma Density Measurement At 11 Khzmentioning

confidence: 99%

Investigating the characteristics of 11 kHz excitation of EFCAP and its selective effect on breast cancer cell death

Misra

Bellare

Tiwari

et al. 2023

Plasma Processes & Polymers

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Recently developed excitation frequency‐controlled cold atmospheric pressure plasma has shown its efficacy in producing tunable effects with different excitation frequencies in terms of reactive species generation and cancer cell death. This study investigates the electron number density of plasma produced at 11 kHz excitation from stark broadened Hα line, discharge characteristics through simultaneous recording of voltage‐current signals, and high‐speed images of the discharge zone. Malignant breast cancer cells (MCF‐7) and nonmalignant breast cells (MCF‐10A) were used in selectivity experiments. Proliferation and clonogenic assays revealed selective death of cancer cells. DNA damage and DNA repair kinetics were studied using time‐dependent γ‐H2AX foci formation assessment and the selective killing of cancerous cells was established for the 60 s of plasma treatment.

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“…Changes in emission intensities with power are related to higher energy delivered to the plasma. Higher power probably could lead to an increase in the electron temperature as well as electron density which influences the emission intensity of excited species [62]. From the viewpoint of treatments, higher intensities and concentrations of reactive species are the essential factors in order to degrade organic pollutants [11,44].…”

Section: Solution Analysismentioning

confidence: 99%

Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet

et al. 2022

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In this work, the direct and indirect removal of Acid Blue 25 (AB25) from water by using cold atmospheric pressure plasma jet (APPJ) has been demonstrated. APPJ with a pin electrode type configuration operating with argon as a working gas was used as a plasma source for treatments. In this configuration, argon plasma was formed in the contact with surrounding air over the liquid surface. The plasma was driven by using a high voltage radio frequency (RF) power supply. The system was characterized by the measurement of electrical characteristics and by employing optical emission spectroscopy (OES). The electrical characterization gave information about the voltages and currents, i.e., working points of the discharge, as well as power deposition to the sample. OES recorded the emission spectra and confirmed several existing reactive species in the gas phase of the plasma system. During the direct treatment, AB25-containing solution was directly exposed to APPJ. The direct treatment was performed by modifying various experimental parameters, such as initial AB25 concentrations, treatment times, and input powers. In the indirect treatment, AB25 was treated by using plasma activated water (PAW). The characterization of PAW was performed and various plasma-induced long-lived species, such as nitrate (NO3−), nitrite (NO2−) and hydrogen peroxide (H2O2) have been quantified using colorimetric techniques. Besides, blank experiments have been conducted with main constituents in PAW, where AB25 was treated individually by NO3−, NO2−, and H2O2 and with a mixture of these three species. As expected, with the direct treatment almost complete removal of AB25 was achieved. The measurements also provided an insight into the kinetics of the degradation of AB25. In the indirect treatment, PAW removed a significant amount of AB25 within 17 days. In the blank experiments, H2O2 containing solutions created a favourable influence on removal of AB25 from liquid.

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Electron temperature and density of non-thermal atmospheric pressure argon plasma jet by convective wave packet model

Cited by 24 publications

References 29 publications

Influences of Plasma Plume Length on Structural, Optical and Dye Degradation Properties of Citrate-Stabilized Silver Nanoparticles Synthesized by Plasma-Assisted Reduction

Influences of Plasma Plume Length on Structural, Optical and Dye Degradation Properties of Citrate-Stabilized Silver Nanoparticles Synthesized by Plasma-Assisted Reduction

Investigating the characteristics of 11 kHz excitation of EFCAP and its selective effect on breast cancer cell death

Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet

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