Characterization and bacterial inactivation application of multiple pin-to-plate electrode-based DBD plasma driven by nanosecond-pulsed high voltage

Physics of Plasmas, Journal Year: 2025, Volume and Issue: 32(2)

Published: Feb. 1, 2025

A diffuse and large-area dielectric barrier discharge (DBD) filled with air helium gas mixtures was generated by a unipolar nanosecond-pulsed high voltage. large-gap multiple pin-to-plate electrode employed to facilitate the insertion of well plates into plasma discharge. The nanosecond high-voltage-pulsed has unique advantages in producing DBD plasma. We examined changes properties upon varying operating parameters such as composition flow rate, pulse Various types liquid (de-ionized, tap, saline water, phosphate buffered LB broth) were exposed physicochemical (pH electrical conductivity) concentrations reactive species treated liquids (such H2O2, NO2−, O3, which play central roles aqueous-phase chemistry plasma-treated for bacterial inactivation) measured function parameters. observed generate significantly higher level various liquid. For investigating treatment containing suspended microorganisms, 1 ml Escherichia coli (E. coli) stock suspension pipetted 9 DW. resulting suspensions selected time. Six-log E. reduction achieved after 19 h incubation. mixture ambient 2 slm exhibited an enhanced inactivation efficacy, correlated RONS concentration pH liquids.

Language: Английский

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Effects of electrohydrodynamic charge transport on surface motion and deformation at a plasma–liquid interface

Applied Mathematical Modelling, Journal Year: 2025, Volume and Issue: unknown, P. 116115 - 116115

Published: March 1, 2025

Language: Английский

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Recent Insights Into Interfacial Transport and Chemical Reactions of Plasma‐Generated Species in Liquid

Plasma Processes and Polymers, Journal Year: 2024, Volume and Issue: 22(1)

Published: Oct. 20, 2024

ABSTRACT The chemistry of plasma–liquid interactions involves a complex interplay physical and chemical processes at the interface. These give rise to generation, transport, transformation various reactive species. Since publication Lorenz Roadmap in 2016, significant progress has been made understanding interfacial transport coupled reactions plasma‐generated species with inorganic organic compounds. However, critical aspects mass transfer still require further investigation. This review summarizes recent work on interface liquid phase. We highlight key findings related involvement O atoms, H radicals, solvated electrons, photons, nitrogen‐derived within bulk liquid.

Language: Английский

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Ultrathin natural biotite crystals as a dielectric layer for van der Waals heterostructure applications

Nanotechnology, Journal Year: 2024, Volume and Issue: 35(50), P. 505703 - 505703

Published: Oct. 1, 2024

Abstract Biotite, an iron-rich mineral belonging to the trioctahedral mica group, is a naturally abundant layered material (LM) exhibiting attractive electronic properties for application in nanodevices. Biotite stands out as non-degradable LM under ambient conditions, featuring high-quality basal cleavage—a significant advantage van der Waals heterostructure (vdWH) applications. In this work, we present micro-mechanical exfoliation of biotite down monolayers (1Ls), yielding ultrathin flakes with large areas and atomically flat surfaces. To identify characterize mineral, conducted multi-elemental analysis using energy-dispersive spectroscopy mapping. Additionally, synchrotron x-ray fluorescence infrared nano-spectroscopy were employed probe its iron content vibrational signature few-layer form, respectively, sensitivity layer number. We have also observed good morphological structural stability time (up 12 months) no important changes their physical after thermal annealing processes flakes. Conductive atomic force microscopy evaluated electrical capacity, revealing breakdown strength approximately 1 V nm −1 . Finally, explore use substrate encapsulating vdWH performed optical magneto-optical measurements at low temperatures. find that work 1L-MoSe 2 , comparable hexagonal boron nitride flakes, but it induces small change g -factor values, most likely due natural impurities on crystal structure. Furthermore, our results show are useful systems protect sensitive LMs such black phosphorus from degradation up 60 days air. Our study introduces promising, cost-effective advancement future nanotechnologies.

Language: Английский

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Plasma Control: A Review of Developments and Applications of Plasma Medicine Control Mechanisms

Plasma, Journal Year: 2024, Volume and Issue: 7(2), P. 386 - 426

Published: May 27, 2024

Cold atmospheric plasmas (CAPs) within recent years have shown great promise in the field of plasma medicine, encompassing a variety treatments from wound healing to treatment cancerous tumors. For each subsequent treatment, different application CAPs has been postulated and attempted best treat target for most effective results. These varied through implementation control parameters such as applied settings, electrode geometries, gas flow, duration treatment. However, with an extensive number variables consider, scientists engineers sought means accurately best-desired effects medical applications. This paper seeks investigate characterize historical precedent use mechanisms medicine. Current strategies, parameters, schemes will be extrapolated developments successes gain better insight into future challenges that are still present overall devices. Proposed approaches, data-driven machine learning, closed-loop feedback controls, showcased next steps toward application.

Language: Английский

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Plasma‐Treated Liquids for Medicine: A Narrative Review on State and Perspectives

Plasma Processes and Polymers, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

ABSTRACT Plasma‐treated liquids and their medical application have gained momentum in the fields of plasma science recent years. Most research has been done field cancer treatment. Another new promising special CAP−liquid interaction is hydrogels, which can serve as localized reservoirs for delivery long‐lived reactive oxygen nitrogen species other active ingredients such chemotherapeutic drugs. Identifying hydrogel compositions optimal treatment, reservoir function, from a regulatory point view use medicine, together with chemical identification biologically molecules interdependencies to operation parameters, are fundamental challenges field.

Language: Английский

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Surface modification of W–Ta–V–Cr multi-component alloy after low-energy He plasma irradiation

Nuclear Fusion, Journal Year: 2024, Volume and Issue: 64(8), P. 086035 - 086035

Published: June 14, 2024

Abstract This study explores a hypothetical scenario where low-activation refractory multi-component alloys (RMCAs) are considered for use as divertor target materials in fusion reactors. To investigate the surface modifications under service conditions, multi-phase W–Ta–V–Cr RMCA is irradiated with low-energy helium (He) plasma at varying temperatures to approximately 5.0 × 10 25 He·m −2 . The W-rich and Cr-rich phases mimic mono-phase segregation grain boundaries, respectively. Following irradiation, fuzz layer formation observed all lower than pure W requires. Additionally, nano He bubbles identified tendrils 920 °C. modified layers exhibit reduced V Cr content increasing temperature, transitioning into W-Ta binary Notably, on phase thinner that While suggests alloy’s potential material, challenges include temperature high sputtering yield, raising concerns contamination during reactor operation. dual perspective highlights both promise of utilizing RMCAs severe environments.

Language: Английский

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Perspectives on Coupling Nonthermal Plasma Generated in Gas–Liquid Water Environments with Microbes

Plasma Chemistry and Plasma Processing, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Language: Английский

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