Atomic Oxygen Maximization in High-Voltage Pulsed Cold Atmospheric Plasma Jets

Georgescu, N; Lungu, C.P.; Lupu, Andreea-Roxana; Osiac, M.

doi:10.1109/tps.2010.2070811

Cited by 24 publications

(32 citation statements)

References 36 publications

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“…In this work, it is assumed that the isotopic exchange (replacement of 16 O by 18 O in 18 O atmospheres) kinetics are far slower (of the order of a few days) than the ones due to the plasma treatment (a few minutes) [25]. This means that the effect of isotopic exchange is always negligible compared with the effect of plasma treatment concerning the quantity of 18 O present in the bacteria cells.…”

Section: Methodsmentioning

confidence: 99%

“…This means that the effect of isotopic exchange is always negligible compared with the effect of plasma treatment concerning the quantity of 18 O present in the bacteria cells.…”

Section: Methodsmentioning

confidence: 99%

“…This means that ROS species are grafted on aliphatic chains (hydroxyl, carboxylic and ketone groups) of lipids or proteins present in bacteria cells during the plasma treatment and then they should be detected by the high-lateral-resolution secondary ion mass spectrometry (NanoSIMS) technique if present in sufficient quantities in the treated bacteria. Then, even if permeation of 18 O 2 in bacteria occurs, those oxygen molecules unreacted with the bacteria structure and just absorbed by the cells are easily removed when the biological material is prepared and put under vacuum for characterization. Consequently, the only oxygen species that can be detected within the cell are those that are chemically bonded.…”

Section: Methodsmentioning

confidence: 99%

“…ROS such as atomic oxygen are probably more likely to build such bonds, whereas molecular oxygen in ground state gets in and out very easily according to the pressure conditions. Before plasma treatment, 18 O is also present in natural abundance in the molecules constituting the bacteria cells (in hydroxyl, ketone, carboxylic acid and other groups) but not as isolated atomic or molecular oxygen. In order to quantify 18 O coming from plasma from that naturally present in the bacteria, quantities of 18 O in non-plasma-treated but exposed to Ar/ 18 O mixture and in plasma-treated bacteria are compared.…”

Section: Methodsmentioning

confidence: 99%

“…By working with different gas mixtures, e.g. Ar, Ar/O 2 or N 2 /O 2 , several authors have noticed decontamination and sterilization effects under post-discharge conditions [18]. Correlations between microbial inactivation and UV photons and oxygen atoms have been proposed [5,9,10].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

NanoSIMS50 analyses of Ar/¹⁸O₂plasma-treatedEscherichia colibacteria

Clément

Lecoq²,

Duday³

et al. 2011

New J. Phys.

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Section: Methodsmentioning

confidence: 99%

“…This means that the effect of isotopic exchange is always negligible compared with the effect of plasma treatment concerning the quantity of 18 O present in the bacteria cells.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

NanoSIMS50 analyses of Ar/¹⁸O₂plasma-treatedEscherichia colibacteria

Clément

Lecoq²,

Duday³

et al. 2011

New J. Phys.

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Study of Reactive Oxygen or/and Nitrogen Species Binding Processes on E. coli Bacteria with Mass Spectrometry Isotopic Nanoimaging

Duday¹,

Clément

Lecoq³

et al. 2013

Plasma Process. Polym.

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Today, it is necessary to better understand the role of reactive species in plasmas on biological objects in order to use plasma processes for biomedical applications. Even when well-known plasma set-ups producing one main reactive species in a controlled environment are used, it is still difficult to understand reactive species interaction processes with biological systems. In this study, nanoimaging with the most sensitive mass spectrometry technology, and the use of isotopic 15 N 2 or/and 18 O 2 containingAr gas mixtures to produce the plasma is proposed in order to obtain isotopic and elemental data on microwave late afterglow treated Escherichia coli bacteria. By this way, new data dealing with reactive species binding processes on plasma treated bacteria by using NanoSIMS50 mass spectrometer are obtained.

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Atmospheric Pressure Non-Equilibrium Plasma Treatment to Improve the Electrospinnability of Poly(L -Lactic Acid) Polymeric Solution

Colombo¹,

Fabiani

Focarete

et al. 2014

Plasma Process. Polym.

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This work is focused on the use of non-thermal plasma to improve the electrospinnability of poly(L-lactic acid) (PLLA). The use of toxic high boiling point solvents is minimized to produce high quality solvent free nanofibrous scaffolds for biomedical applications. PLLA polymeric solutions dissolved in pure dichloromethane are exposed to the plasma plume of a jet developed by some of the authors and driven by high voltage pulses with rise rate of several kV ns À1 . The effects of peak voltage, pulse repetition frequency, volume of the solution and treatment time on the morphology of electrospun fibers are investigated by means of scanning electron microscope. Electrospinning is performed at different time lapses after the plasma treatment to study the durability of the induced effects. Figure 10. Spatially resolved optical emission spectrum of the plasma jet, operating conditions: PV ¼ 20 kV, PRF ¼ 330 Hz, Ar flow rate ¼ 1 slpm. V. Colombo et al.

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Atomic Oxygen Maximization in High-Voltage Pulsed Cold Atmospheric Plasma Jets

Cited by 24 publications

References 36 publications

NanoSIMS50 analyses of Ar/¹⁸O₂plasma-treatedEscherichia colibacteria

NanoSIMS50 analyses of Ar/¹⁸O₂plasma-treatedEscherichia colibacteria

Study of Reactive Oxygen or/and Nitrogen Species Binding Processes on E. coli Bacteria with Mass Spectrometry Isotopic Nanoimaging

Atmospheric Pressure Non-Equilibrium Plasma Treatment to Improve the Electrospinnability of Poly(L -Lactic Acid) Polymeric Solution

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Atomic Oxygen Maximization in High-Voltage Pulsed Cold Atmospheric Plasma Jets

Cited by 24 publications

References 36 publications

NanoSIMS50 analyses of Ar/18O2plasma-treatedEscherichia colibacteria

NanoSIMS50 analyses of Ar/18O2plasma-treatedEscherichia colibacteria

Study of Reactive Oxygen or/and Nitrogen Species Binding Processes on E. coli Bacteria with Mass Spectrometry Isotopic Nanoimaging

Atmospheric Pressure Non-Equilibrium Plasma Treatment to Improve the Electrospinnability of Poly(L -Lactic Acid) Polymeric Solution

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NanoSIMS50 analyses of Ar/¹⁸O₂plasma-treatedEscherichia colibacteria

NanoSIMS50 analyses of Ar/¹⁸O₂plasma-treatedEscherichia colibacteria