Comparative Studies of Atmospheric Pressure Plasma Characteristics Between He and Ar Working Gases for Sterilization

Seo, Young Sik; Mohamed, Abdel‐Aleam H.; Woo, Kyung Chul; Lee, Hyun‐Wook; Lee, Jae Koo; Kim, Kyong‐Tai

doi:10.1109/tps.2010.2058870

Cited by 84 publications

(57 citation statements)

References 27 publications

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“…The energy conservation is one advantage of Ar plasma jet. [6] It is also noticeable that the difference in the power deposition between He and Ar jet arrays becomes larger when the applied voltage is higher. It seems that the filamentary mode of Ar limits the power coupling into the plasma.…”

Section: Effects Of Flow Rate and Applied Voltage On The Plume Charmentioning

confidence: 99%

“…Therefore, APPJ is suitable for potential applications in materials processing, plasma biomedicine, surface decontamination, and thin film deposition. [5][6][7][8][9] However, the treatment area of a typical single plasma jet is less than 1 cm 2 due to the confinement of the structure of the plasma jet devices. This is one important factor to limit the applications of APPJ.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies also proved that Ar is more energy efficient to produce active species and therefore has a higher efficacy in sterilization. [6,31] The investigation and comparison of He and Ar plasma jet array discharge characteristics and discharge mechanisms, especially the jet-to-jet interaction mechanism at different discharge parameters, are important for the achievement of proper performance in different applications. In this paper, the comparative studies of He and Ar 1D plasma jet arrays with cross-field needle-ring electrode structure are performed using electrical measurements, optical images of the discharges, Schlieren photograph, and ICCD images.…”

Section: Introductionmentioning

confidence: 99%

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Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Liu

Zhang

Fang

et al. 2017

Plasma Processes & Polymers

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Atmospheric Pressure Plasma Jet (APPJ) arrays are considered as one of the most promising methods for uniform plasma processing of large uneven surfaces. To improve the downstream uniformity and enhance the surface treatment effects, it is important to reveal the mechanisms of the jet‐to‐jet interactions of plasma plumes in the jet array. In this paper, the electrical, optical, and fluid characteristics of the He and Ar three‐channel one‐dimensional (1D) plasma jet arrays with cross‐field needle‐ring electrode structure are studied and compared. It is found that there are divergences in the outside plumes of the propagation trajectory by the repellency of the plasma bullets and the spatial uniformity of the He and Ar plasma jet arrays can be improved with a lower applied voltage and a higher gas flow rate. The deflection angle of side plumes with respect to the central one of He is larger than that of Ar jet array due to the lighter molecular weight and better discharge synchronization. The experimental results show that Ar jet array is more controllable and stable and is more suitable for the design of the practical, simpler, and cheaper scalable plasma jet arrays.

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Section: Effects Of Flow Rate and Applied Voltage On The Plume Charmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Liu

Zhang

Fang

et al. 2017

Plasma Processes & Polymers

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“…To generate He and Ar APPJs, a cylindrical aluminum tube with 1.5-mm inner diameter was employed as a power electrode, and it was housed within a Teflon tube [4]. The Teflon tube had a grounded ring electrode at the bottom part.…”

mentioning

confidence: 99%

Correlation of Striated Discharge Patterns With Operating Conditions in Helium and Argon Atmospheric-Pressure Plasma Jets

Seo

Lee

Mohamed

et al. 2011

IEEE Trans. Plasma Sci.

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This paper presents the evolution of striated discharge patterns in helium and argon atmospheric-pressure plasma jets as a function of gas flow rate and driving voltage. The striated patterns have been observed in helium and argon plasma jets at gas flow rates above 5 and 3 L/min, respectively. The striation patterns appear over the entire voltage range used for investigation (from 4 to 8 kV) in the helium plasma jet, whereas in the argon plasma jet, striation patterns appear over a limited voltage range (from 5.5 to 6.5 kV).Index Terms-Atmospheric pressure discharge, ionization propagation wave, striated discharge patterns.

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“…Liquid chemicals are commonly used for disinfection, but ultrasound and UV light are sometimes used. Sterilization methods include autoclaving, gas, dry heat, hydrogen peroxide gas plasma and liquid chemical sterilizations 9,14,15,19. Because inadequate disinfection and sterilization are the main causes of infections at dental clinics, dental instruments and materials should be completely disinfected or sterilized to prevent cross-contamination at dental clinics.…”

Section: Discussionmentioning

confidence: 99%

Sterilization effect of atmospheric pressure non-thermal air plasma on dental instruments

et al. 2013

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PURPOSEAutoclaves and UV sterilizers have been commonly used to prevent cross-infections between dental patients and dental instruments or materials contaminated by saliva and blood. To develop a dental sterilizer which can sterilize most materials, such as metals, rubbers, and plastics, the sterilization effect of an atmospheric pressure non-thermal air plasma device was evaluated.MATERIALS AND METHODSAfter inoculating E. coli and B. subtilis the diamond burs and polyvinyl siloxane materials were sterilized by exposing them to the plasma for different lengths of time (30, 60, 90, 120, 180 and, 240 seconds). The diamond burs and polyvinyl siloxane materials were immersed in PBS solutions, cultured on agar plates and quantified by counting the colony forming units. The data were analyzed using one-way ANOVA and significance was assessed by the LSD post hoc test (α=0.05).RESULTSThe device was effective in killing E. coli contained in the plasma device compared with the UV sterilizer. The atmospheric pressure non-thermal air plasma device contributed greatly to the sterilization of diamond burs and polyvinyl siloxane materials inoculated with E. coli and B. subtilis. Diamond burs and polyvinyl siloxane materials inoculated with E. coli was effective after 60 and 90 seconds. The diamond burs and polyvinyl siloxane materials inoculated with B. subtilis was effective after 120 and 180 seconds.CONCLUSIONThe atmospheric pressure non-thermal air plasma device was effective in killing both E. coli and B. subtilis, and was more effective in killing E. coli than the UV sterilizer.

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Comparative Studies of Atmospheric Pressure Plasma Characteristics Between He and Ar Working Gases for Sterilization

Cited by 84 publications

References 27 publications

Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Jet‐to‐jet interactions in atmospheric‐pressure plasma jet arrays for surface processing

Correlation of Striated Discharge Patterns With Operating Conditions in Helium and Argon Atmospheric-Pressure Plasma Jets

Sterilization effect of atmospheric pressure non-thermal air plasma on dental instruments

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