Effect of cold atmospheric plasmas on bacteria in liquid: The role of gas composition

Kaupe, J.; Tschang, Chen-Yon Tobias; Birk, Florian; Coenen, D; Thoma, Markus H.; Mitic, Slobodan

doi:10.1002/ppap.201800196

Cited by 14 publications

(24 citation statements)

References 50 publications

(98 reference statements)

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“…Atmospheric pressure gas–liquid discharges have been widely applied in materials processing, water purification, and biomedicine, in great part due to the abundance of reactive chemical species . In these applications, the chemical activity of gas–liquid discharge plasma is crucial, and many efforts have been made to better serve the applications.…”

Section: Introductionmentioning

confidence: 99%

Mode transition and plasma characteristics of nanosecond pulse gas–liquid discharge: Effect of grounding configuration

Wang

Yang

Zhou

et al. 2019

Plasma Processes & Polymers

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Transitions between the streamer and spark modes affect the stability of gas–liquid discharges, limiting their practical applications, while the nature of such transitions is poorly understood. Here we clarify the often neglected effect of a dielectric on the gas–liquid discharge stability, using direct and indirect grounding configurations. Discharge modes and plasma characteristics in these two configurations are investigated. The discharge appears in a transient spark mode in the direct grounding while in a streamer mode in the indirect case. It is shown that the dielectric significantly improves the discharge stability. The gas temperature and electron density in the transient spark are 380 K and 1017/cm3 with a 30 kV pulse voltage, respectively, which are higher than those in the streamer mode.

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Section: Introductionmentioning

confidence: 99%

Mode transition and plasma characteristics of nanosecond pulse gas–liquid discharge: Effect of grounding configuration

Wang

Yang

Zhou

et al. 2019

Plasma Processes & Polymers

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“…The concentrations of H 2 O 2 , nitrate, and nitrite in PTH were measured using a microplate reader (Thermo Scientific Varioskan ® Flash Reader) [30,31]. For the measurement of H 2 O 2 , the Amplex Red Hydrogen Peroxide Assay Kit (Invitrogen, Carlsbad, CA, USA) was used.…”

Section: Measurements Of the Aqueous Reactive Speciesmentioning

confidence: 99%

The addition of hydrogen peroxide and the incorporation of fluorides by surface plasma jointly promote the bactericidal effects of plasma-treated water

Xi¹,

Wang²,

Guo³

et al. 2022

J. Phys. D: Appl. Phys.

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The antibacterial ability of plasma-treated water (PTW) is affected by many factors, such as the type of equipment and operating conditions. These factors hinder the application of plasma technology, making it necessary to develop new methods that could prepare PTW with high efficiency for disinfection. In this study, a surface discharge plasma with a dielectric layer of polytetrafluorethylene (PTFE) was used to treat 110 mM H2O2 solution to prepare plasma-treated H2O2 solution (PTH). The bactericidal ability of PTW was evaluated by the inactivation of methicillin-resistant Staphylococcus aureus (MRSA). The results show that the PTH treated by surface plasma for 3 minutes inactivated more than 6.3 orders of magnitude MRSA. Importantly, bubbles were produced when the MRSA suspension was incubated with untreated H2O2 solution, while no bubbles were observed when it was treated by PAH. Further experiments show the amounts of bubbles produced in this process were negatively correlated with the bactericidal effects. The concentrations of several reactive species in PTH were measured to provide useful information for antibacterial mechanism analysis. We suggested that the synergism among hydrogen peroxide, peroxynitrite, as well as unstable reactive fluorides, derived from the gaseous fluorides from the etching of the PTFE dielectric, might play a key role in the bactericidal process. This work provides a new strategy to produce potent disinfectants with low irritation for the disinfection of the environment, object surfaces, and body surfaces.

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“…Cold atmospheric plasmas (CAPs) have been widely used in the biomedical field in recent years. [ 9–15 ] Due to the high‐energy charged particles, active oxides and nitrides, free radicals, electric fields, ultraviolet rays, and others, CAPs have been proved to be beneficial for disinfection, [ 16 ] wound treatment, [ 17 ] cancer treatment, [ 18 ] material modification, [ 19 ] stem cell differentiation, [ 20 ] cytoprotection, [ 21 ] and dentistry applications. [ 22 ] CAPs also have potential in tissue engineering and regenerative medicine.…”

Section: Introductionmentioning

confidence: 99%

Investigation of air plasma generated by surface microdischarge for decellularized porcine aortic valve leaflets modification

Dai

Dong

et al. 2020

Plasma Processes & Polymers

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In this study, the surface microdischarge (SMD) device was used to modify the mechanical properties of decellularized porcine aortic valve leaflets (DPAVL). It was found that SMD treatment under NOx mode considerably improved the ultimate tensile strength and the Young's modulus of DPAVL, whereas treatment under O3 mode had no effect. The absorbance band peak at ~1,375 cm−1, measured by Fourier‐transform infrared spectrometer, increased with treatment time in the freeze‐dried DPAVL group under NOx mode treatment. The microstructure was not destroyed and blood compatibility test showed no toxicity. The reaction between plasma‐activated species and the DPAVL and the pH change, other than temperature/UV irradiation, plays a major role. All of the results indicate that cold atmospheric plasma treatment seems to be a potential alternative for DPAVL modification.

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Effect of cold atmospheric plasmas on bacteria in liquid: The role of gas composition

Cited by 14 publications

References 50 publications

Mode transition and plasma characteristics of nanosecond pulse gas–liquid discharge: Effect of grounding configuration

Mode transition and plasma characteristics of nanosecond pulse gas–liquid discharge: Effect of grounding configuration

The addition of hydrogen peroxide and the incorporation of fluorides by surface plasma jointly promote the bactericidal effects of plasma-treated water

Investigation of air plasma generated by surface microdischarge for decellularized porcine aortic valve leaflets modification

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