Characterization of Ar–O<sub>2</sub>DC Discharge Employing Langmuir Probe in Conjunction With Photodetachment

Legorreta, J.R.; Yousif, F. B.; Fuentes, B.; Vázquez, F.; Rivera, Marco; Valencia, Horacio Martínez

doi:10.1109/tps.2016.2578880

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…This drop in electron temperature with power is assigned to the necessity to balance electron generation and loss, which needs a lower ionization rate and lower electron temperature to compensate for increased density occurring with several electron collisions during oscillation at high power supplies [45]. As pressure increases, the variation of electron density is lower, which results in lower decreases in electron temperature [46].…”

Section: Resultsmentioning

confidence: 99%

Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma

et al. 2022

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Plasma parameters of radiofrequency discharge generated at low pressures in an argon-oxygen mixture addressed for biomedical surface sterilization have been optimized. Numerical results illustrate the density distributions of different species and electron temperatures during the electrical discharge process. The current discharge acting in the abnormal range decreases at higher oxygen gas flow rates. The temperature of electrons drops with pressure while it rises by adding oxygen. Nevertheless, electron density displays an adverse trend, exhibited by the electron’s temperature. The average particle density of the reactive species is enhanced in Ar/O2 compared to He/O2, which ensures a better efficiency of Ar/O2 in sterilizing bacteria than He/O2. The impact of oxygen addition on the discharge mixture reveals raised oxygen atom density and a reduction in metastable oxygen atoms. A pronounced production of oxygen atoms is achieved at higher frequency domains. This makes our findings promising for biomedical surface sterilization and leads to optimal parameter discharges used for sterilization being at 30% of oxygen gas ratio and 0.3 Torr pressure.

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Section: Resultsmentioning

confidence: 99%

Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma

et al. 2022

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“…The curves are used to obtain n e and T e , employing the EEDF method of [13]. The lower discharge power would correspond to lower electron temperature while that of higher discharge power would correspond to higher electron temperature [16][17][18].…”

Section: Electron Density and Temperaturementioning

confidence: 99%

Laser induced photo-detachment of O₂ in DC discharge

Legorreta¹,

Patiño²,

Yousif³

2018

Plasma Sci. Technol.

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Determination of the negative ion number density of O 2 and Oin a DC discharge of oxygen plasma was made employing Langmuir probe in conjunction with eclipse laser photodetachment technique. The temporal evolution of the extra electrons resulting from the photodetachment of O 2 and Owere used to evaluate the negative ion number density. The ratio of O 2 number density to Ovaried from 0.03 to 0.22. Number density of both O 2 and Oincreased with increasing power and decreased as the pressure was increased. Electron number density was evaluated from the electron energy distribution function (EEDF) using the I-V recorded characteristic curves. Electron temperature between 2 and 2.7 eV were obtained. Influence of the a O 2 1 g D ( ) metastable state is discussed.

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Some similarities and/or differences between neon-hydrogen and neon-oxygen mixture discharges

Tanışlı

Şahi̇n

2018

AIP Conference Proceedings

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Characterization of Ar–O₂DC Discharge Employing Langmuir Probe in Conjunction With Photodetachment

Cited by 3 publications

References 23 publications

Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma

Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma

Laser induced photo-detachment of O₂ in DC discharge

Some similarities and/or differences between neon-hydrogen and neon-oxygen mixture discharges

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Characterization of Ar–O2DC Discharge Employing Langmuir Probe in Conjunction With Photodetachment

Cited by 3 publications

References 23 publications

Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma

Optimal Discharge Parameters for Biomedical Surface Sterilization in Radiofrequency AR/O2 Plasma

Laser induced photo-detachment of O2 in DC discharge

Some similarities and/or differences between neon-hydrogen and neon-oxygen mixture discharges

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Characterization of Ar–O₂DC Discharge Employing Langmuir Probe in Conjunction With Photodetachment

Laser induced photo-detachment of O₂ in DC discharge