Effects of the electrical parameters and gas flow rate on the generation of reactive species in liquids exposed to atmospheric pressure plasma jets

2016 ◽  
Vol 23 (7) ◽  
pp. 073515 ◽  
Author(s):  
Eun Jeong Baek ◽  
Hea Min Joh ◽  
Sun Ja Kim ◽  
T. H. Chung
Keyword(s):  
Flow Rate ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Atmospheric Pressure Plasma ◽  
Reactive Species ◽  
Plasma Jets ◽  
Gas Flow Rate ◽  
Electrical Parameters ◽  
Pressure Plasma

Atmospheric Pressure Plasma Jets for 2D and 3D Materials Processing

2005 ◽  
Vol 107 ◽  
pp. 119-124 ◽  
Author(s):  
Jacek Kędzierski ◽  
Jürgen Engemann ◽  
Markus Teschke ◽  
Dariusz Korzec
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Atmospheric Pressure Plasma ◽  
Cylindrical Symmetry ◽  
Plasma Jets ◽  
Partial Explanation ◽  
Plasma Gun ◽  
Pressure Plasma ◽  
Model Formation ◽  
2D And 3D

A novel atmospheric pressure plasma jet with a cylindrical symmetry i.e. a tubular dielectric barrier and two tubular electrodes was developed at Microstructure Research Center – fmt, Wuppertal, Germany. The jet was investigated by means of ultra fast (down to tens of nanoseconds exposition time) ICCD photography and regular CCD photography. Some spectacular results were achieved and their partial explanation was presented. The jet acts as a “plasma gun” throwing small “plasma bullets” out of its orifice. The most important findings are: (i) the bullet velocity is approximately 3 orders of magnitude larger than the gas flow velocity, and (ii) the jet dynamics is mainly electrical field controlled. A simple model - formation of a jet in air - based on a Helium metastables core can explain qualitatively reasonably well most of our experimental observations. Some variations of the original cylindrical jet geometry were presented and discussed: microjet and fmt Plasma-Pen, single tube multijet, tube-in-tube single and multijet systems (so-called “Wuppertal-Approach”).

scholarly journals Inactivation by helium cold atmospheric pressure plasma for Escherichia coli and Staphylococcus aureus

2019 ◽  
Vol 14 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Khaled Lotfy ◽  
Sayed Mohammed Khalil ◽  
Hany Abd El-Raheem
Keyword(s):  
Flow Rate ◽  
Atmospheric Pressure ◽  
Plasma Temperature ◽  
Wavelength Region ◽  
Atmospheric Pressure Plasma ◽  
Optical Emission ◽  
Reactive Species ◽  
Pressure Plasma ◽  
Cold Atmospheric Pressure Plasma ◽  
The Impact

AbstractA helium cold atmospheric pressure plasma jet (HCAPPJ) driven by a commercial neon power supply was designed and utilized for inactivation bacteria. The generated reactive spices by HCAPPJ were investigated by optical emission spectroscopy. The reactive species of OH, OI, OI, N21+, N21+ and He were identified in the UV–Vis wavelength region. The reactive species was not detected between 200 nm and 300 nm, as the flow rate of helium gas increased that led to the plasma temperature reducing to a value near to the room temperature. In this work, we studied the impact of HCAPPJ on Gram-positive and Gram-negative bacteria. The survival amounts of the two types of bacteria were decreased vastly when the rate flow rate was equal to 10 L/min.

Interplay of discharge and gas flow in atmospheric pressure plasma jets

2011 ◽  
Vol 109 (9) ◽  
pp. 093305 ◽  
Author(s):  
Nan Jiang ◽  
JingLong Yang ◽  
Feng He ◽  
Zexian Cao
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jets ◽  
Pressure Plasma

Patterns of plasma jet arrays in the gas flow field of non-thermal atmospheric pressure plasma jets

2019 ◽  
Vol 26 (1) ◽  
pp. 013505 ◽  
Author(s):  
M. Hasnain Qaisrani ◽  
Congyun Li ◽  
Pei Xuekai ◽  
M. Khalid ◽  
Xian Yubin ◽  
...  
Keyword(s):  
Flow Field ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Plasma Jets ◽  
Pressure Plasma ◽  
Gas Flow Field

Dynamics of the gas flow turbulent front in atmospheric pressure plasma jets

2016 ◽  
Vol 25 (3) ◽  
pp. 035013 ◽  
Author(s):  
X Pei ◽  
M Ghasemi ◽  
H Xu ◽  
Q Hasnain ◽  
S Wu ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jets ◽  
Pressure Plasma

Investigation of plasma polymerized pyrrole under various gas flow rates and input power using atmospheric pressure plasma jets

2017 ◽  
Vol 651 (1) ◽  
pp. 26-34
Author(s):  
Dong Ha Kim ◽  
Choon-Sang Park ◽  
Won Hyun Kim ◽  
Jung Goo Hong ◽  
Bhum Jae Shin ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Atmospheric Pressure Plasma ◽  
Input Power ◽  
Plasma Jets ◽  
Flow Rates ◽  
Pressure Plasma

scholarly journals Effects of O2 Addition on the Discharge Parameters and Production of Reactive Species of a Transferred Atmospheric Pressure Plasma Jet

2021 ◽  
Vol 11 (14) ◽  
pp. 6311
Author(s):  
Fellype Nascimento ◽  
Kleber Petroski ◽  
Konstantin Kostov
Keyword(s):  
Atmospheric Pressure ◽  
Light Emission ◽  
Noble Gas ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Reactive Species ◽  
Plasma Jets ◽  
Therapeutic Effects ◽  
Plastic Tube ◽  
Pressure Plasma

The therapeutic effects of atmospheric pressure plasma jets (APPJs) have been associated with the presence of reactive species, mainly the reactive oxygen and nitrogen ones, generated in this kind of plasmas. Due to that, many studies attempting to enhance the production of reactive species in APPJs have been performed. The employment of gas admixtures, usually mixing a noble gas with oxygen (O2) or water vapor, is one of the most common methods to achieve such goal. This work presents a study of how the addition of small amounts of O2 affects the electrical parameters and the production of reactive species in a transferred APPJ produced at the tip of a long and flexible plastic tube. The study was carried out employing helium (He) as the working gas and applying a high voltage (HV) in the form of amplitude-modulated sine waveform (burst mode). With this configuration it was possible to verify that the O2 addition reduces the discharge power and effective current, as a result of late ignition and shorter discharge duration. It was also found that the addition of O2 to a certain content in the gas admixture makes the light emission from oxygen atoms increase, indicating an increment in oxygen related reactive species in the plasma jet. However, at the same time the light emitted from hydroxyl (OH) and nitric oxide (NO) exhibits the opposite behavior, i.e., decrease, indicating a reduction of such species in the APPJ. For these reasons, the addition of O2 to the working gas seems to be useful for increasing the effectiveness of the plasma treatment only when the target modification effect is directly dependent on the content of atomic oxygen.

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