Generation of neutral pH high‐strength plasma‐activated water from a pin to water discharge and its bactericidal activity on multidrug‐resistant pathogens

Punith, N.; Singh, Ashish; Ananthanarasimhan, J; Boopathy, Bhavadharini; Chatterjee, Ritika; Moger, Hemanth; Chakravortty, Dipshikha; Rao, Lakshminarayana

doi:10.1002/ppap.202200133

Cited by 8 publications

(3 citation statements)

References 46 publications

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“…Thus, the original hydrogen bond of chitosan is broken, resulting in the dissolution of chitosan in ionic liquid. Plasma can dissolve chitosan, which is also due to the plasma discharge process generating a large number of reactive groups (HNO 2 , HNO 3 , and so on), which can react with water molecules and generate H + through a series of reactions, forming the acidic environment [31]. Chitosan dispersed in water will gradually dissolve in the acidic environment generated by the reaction between plasma and water.…”

Section: Plasma-assisted Dissolution Of Chitosan Under Different Trea...mentioning

confidence: 99%

Dielectric Barrier Discharge Plasma-Assisted Preparation of Chitosan-Based Hydrogels

Liang,

Zhang,

Guo

et al. 2024

IJMS

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Chitosan is widely used in the production of various hydrogels due to its non-biological toxicity, good biocompatibility, and strong biodegradability. However, chitosan-based hydrogels have not been widely used in tissue engineering due to their poor mechanical strength, poor stability and high biotoxicity of cross-linking agents. As a green technology, low temperature plasma is rich in active groups that can be involved in various chemical reactions, such as replacing the components on the chitosan chain, contributing to the cross-linking of chitosan. In this study, a plasma-assisted preparation method of chitosan-based hydrogels was developed and the properties, including mechanics, water absorption, and degradation (or stability), were characterized and analyzed. It is proved that plasma treatment plays a significant role in improving the mechanical strength and stability of hydrogels.

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Section: Plasma-assisted Dissolution Of Chitosan Under Different Trea...mentioning

confidence: 99%

Dielectric Barrier Discharge Plasma-Assisted Preparation of Chitosan-Based Hydrogels

Liang,

Zhang,

Guo

et al. 2024

IJMS

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“…Moreover, 3D objects (like seeds or small samples) can be placed inside the funnel and treated on all sides simultaneously [ 26 , 27 ]. The beneficial properties of this jet device can be explained by the effective trapping of the reactive species inside the conical horn that can be achieved at very short (few mm) sample-to-horn exit distances and moderate gas flow rates [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Study of a Conical Plasma Jet with a Cloth-Covered Nozzle for Polymer Treatment

et al. 2023

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Although atmospheric pressure plasma jets (APPJs) have been widely employed for materials modification, they have some drawbacks, such as the small treatment area (couple of cm2). To overcome this limitation, a funnel-like APPJ with a wide exit has been proposed. In this work, a gas-permeable cotton cloth covered the nozzle of the device to improve the gas flow dynamics and increase its range of operation. The funnel jet was flushed with Ar, and the plasma was ignited in a wide range of gas flow rates and the gap distances between the exit nozzle and the sample holder. The device characterization included electric measurements and optical emission spectroscopy (OES). To evaluate the size of the treatment and the degree of surface modification, large samples of high-density polyethylene (PE) were exposed to plasma for 5 min. Afterward, the samples were analyzed via water contact angle WCA measurements, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). It was found that surface modification occurs simultaneously on the top and bottom faces of the samples. However, the treatment incorporated different functional groups on each side.

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“…Plasma was generated in the form of multiple filaments that emerged from the pin electrode, propagated along the funnel wall until reaching the glass substrate. The reactive species generated by the plasma are trapped inside the conical horn [35] and therefore can efficiently modify a dielectric target placed on the glass. The device was able to perform uniform surface modification over the entire area covered by the funnel exit without any target/jet manipulation [34].…”

Section: Introductionmentioning

confidence: 99%

Plasma Electrode Dielectric Barrier Discharge: Development, Characterization and Preliminary Assessment for Large Surface Decontamination

do Nascimento,

Stancampiano,

Trebulová

et al. 2023

Plasma Chem Plasma Process

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The paper gives the detailed information about a newly developed plasma system applicable for conductive target non-thermal plasma indirect treatment. High voltage microsecond duration pulses delivered in the kHz range are used to ignite a discharge in a glass funnel vessel flushed with argon and equipped with a needle electrode. An air dielectric barrier discharge (DBD) can subsequently be generated if a grounded grid is set a few millimeters apart from the thin glass plate constituting the funnel base, in the funnel-DBD setup. Thus, this air DBD operates with its powered electrode consisting in the transient argon streamer discharge spreading inside the funnel and over the glass plate. This "plasma electrode DBD" is characterized using time-resolved ICCD imaging together with voltage and current probes. This work reports for the first time the funnel-DBD proof of concept operation and its potentialities for large surface decontamination. Argon and air plasma temporal and spatial development is documented and analyzed while electrical characterization using Lissajous plots provide key information on the power and capacitances of the funnel-DBD setup. It is reported that the funnel-DBD operates as a large surface and low power discharge. As with any air-DBD plasma, the modulation of the power density delivered across the air-DBD, processed with changing the pulse repetition rate, results in the control of the ozone concentration. Beyond the plasma electrode-DBD development and characterization, the main motivation of this work is the treatment of conductive samples with the perspective of large surface decontamination. Preliminary demonstrations of the bacterial and yeast inhibition are thus reported for in vitro cultivations through indirect treatment with the funnel-DBD delivering reactive nitrogen and oxygen species.

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Generation of neutral pH high‐strength plasma‐activated water from a pin to water discharge and its bactericidal activity on multidrug‐resistant pathogens

Cited by 8 publications

References 46 publications

Dielectric Barrier Discharge Plasma-Assisted Preparation of Chitosan-Based Hydrogels

Dielectric Barrier Discharge Plasma-Assisted Preparation of Chitosan-Based Hydrogels

Study of a Conical Plasma Jet with a Cloth-Covered Nozzle for Polymer Treatment

Plasma Electrode Dielectric Barrier Discharge: Development, Characterization and Preliminary Assessment for Large Surface Decontamination

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