Examining the Role of Ozone in Surface Plasma Sterilization Using Dielectric Barrier Discharge (<scp>DBD</scp>) Plasma

Mastanaiah, Navya; Banerjee, Poulomi; Johnson, Judith A.; Roy, Subrata

doi:10.1002/ppap.201300108

Cited by 75 publications

(54 citation statements)

References 20 publications

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“…Hence, before using SDBD in any application, the trends of the ozone production and the generation of nitrogen oxides should be characterized. Few works on the ozone production using different SDBD sources under different conditions exist [11,[30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Abdelaziz

Ishijima

Seto

et al. 2016

Plasma Sources Sci. Technol.

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The aim of this study is to investigate the effect of the intermediate frequency (1-10 kHz) of the sinusoidal driving voltage on the characteristics of a developed surface dielectric barrier discharge (SDBD)-based reactor having spikes on its discharge electrode. Moreover, its influence on the production of ozone and nitrogen oxide byproducts is evaluated. The results show that SDBD is operated in the filamentary mode at all the frequencies. Nevertheless, the pulses of the discharge current at high frequencies are much denser and have higher amplitudes than those at low frequencies. The analysis of the power consumed in the reactor shows that a small portion of the input power is dissipated in the dielectric material of SDBD source, whereas the major part of the power is consumed in the plasma discharge. The results of the ozone production show that higher frequencies have a slightly adverse effect on the ozone production at relatively high energy density values, where the ozone concentration is slightly decreased when the frequency is increased at the same energy density. The temperature of the discharge channels and gas is not a crucial factor for the decomposition of ozone in this reactor, while the results of the measurements of nitrogen oxides characteristics 2 indicate that the formation of NO and NO 2 has a significant adverse effect on the production efficiency of ozone due to their oxidation to another nitrogen oxides and their catalytic effect.

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Section: Introductionmentioning

confidence: 99%

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Abdelaziz

Ishijima

Seto

et al. 2016

Plasma Sources Sci. Technol.

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“…14 Plasma devices produce upwards of 100 ppm ozone. 8,9,[15][16][17] Therefore, there is a need for a plasma sterilization system using an alternative delivery method that increases the effective plasma concentration and reduces or counteracts the conversion of plasma into ozone. In particular, such a device should have an ozone production of below 300 ppb ozone, which is the permissible short-term exposure limit set by the Occupational Safety and Health Administration (OSHA).…”

Section: Figmentioning

confidence: 99%

“…7 Plasma can sterilize surfaces in less than 1 min and with a greater degree of bacterial inactivation than soaps. 8,9 When water is used longer than the time required to wash one's hands. Despite its promise, plasma sterilization has not seen widespread implementation in the clinical setting for several reasons.…”

Section: Introductionmentioning

confidence: 99%

Plasma-Activated Vapor for Sanitization of Hands

et al. 2016

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Compliance with established hand hygiene protocols is extremely low in clinical units because these protocols mandate long hand-washing times. This phenomenon results in more numerous healthcare-associated infections and severely compromises the health of patients. Poor compliance is motivated by the hand-washing times required by soaps and sanitizers, which can be as long as 2 minutes. Cold atmospheric plasma is an alternative antimicrobial technology that can reduce the time required for sanitization to approximately 5 s. However, despite many advantages, existing plasma devices generate ozone as a toxic byproduct in high concentrations, so there is a need for a plasma-based hand sterilization system that: (1) produces enough reactive oxygen and nitrogen chemical species to achieve a microbial kill rate that is able to compete with existing hand-sanitizing technology and (2) counteracts the conversion of plasma into ozone. The design presented here used water vapor to perform these functions and to stabilize reactive plasma species. The plasma system delivers a plasma-totype consists of three stages: ultrasonic water vapor generation, dielectric-barrier discharge plasma generation, and a dispensary tubing system. We have shown that the device is capable the use of water vapor.

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“…paper-based electronics | plasma | touch sensors | kirigami | sanitization S tate-of-the-art, plasma generators are capable of manipulating surface chemistries in manufacturing processes (1,2), sterilizing medical devices (3,4), providing thrust for space vehicles (5,6), manipulating lift-to-drag ratios on airfoils (7,8), manipulating heat transfer (9), healing wounds (10), and killing microbes in atmospheric environments (11,12). These plasmabased generators typically use rigid components, which cannot bend or conform to irregularly shaped objects.…”

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confidence: 99%

Paper-based plasma sanitizers

Xie

Chen

Suresh

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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This work describes disposable plasma generators made from metallized paper. The fabricated plasma generators with layered and patterned sheets of paper provide a simple and flexible format for dielectric barrier discharge to create atmospheric plasma without an applied vacuum. The porosity of paper allows gas to permeate its bulk volume and fuel plasma, while plasma-induced forced convection cools the substrate. When electrically driven with oscillating peak-to-peak potentials of ±1 to ±10 kV, the paper-based devices produced both volume and surface plasmas capable of killing microbes. The plasma sanitizers deactivated greater than 99% of Saccharomyces cerevisiae and greater than 99.9% of Escherichia coli cells with 30 s of noncontact treatment. Characterization of plasma generated from the sanitizers revealed a detectable level of UV-C (1.9 nW·cm), modest surface temperature (60°C with 60 s of activation), and a high level of ozone (13 ppm with 60 s of activation). These results deliver insights into the mechanisms and suitability of paper-based substrates for active antimicrobial sanitization with scalable, flexible sheets. In addition, this work shows how paper-based generators are conformable to curved surfaces, appropriate for kirigami-like "stretchy" structures, compatible with user interfaces, and suitable for sanitization of microbes aerosolized onto a surface. In general, these disposable plasma generators represent progress toward biodegradable devices based on flexible renewable materials, which may impact the future design of protective garments, skin-like sensors for robots or prosthetics, and user interfaces in contaminated environments.paper-based electronics | plasma | touch sensors | kirigami | sanitization

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Examining the Role of Ozone in Surface Plasma Sterilization Using Dielectric Barrier Discharge (DBD) Plasma

Cited by 75 publications

References 20 publications

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Plasma-Activated Vapor for Sanitization of Hands

Paper-based plasma sanitizers

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