A reference protocol for comparing the biocidal properties of gas plasma generating devices

Shaw, Alexander H.; Seri, Paolo; Borghi, C.A.; Shama, Gilbert; Iza, Felipe

doi:10.1088/0022-3727/48/48/484001

Cited by 10 publications

(10 citation statements)

References 33 publications

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“…Although all S-DBDs have the same underlying topology, namely two electrodes separated by a dielectric barrier, a number of different electrode designs, such as square [8], hexagonal [6], circular [11] and spiral [12] have been proposed in recent years. To date, however, limited attention has been paid to the influence of the electrode geometry on the efficacy of these S-DBDs, and here we report experimental results that demonstrate that the electrode pattern of the S-DBD can be used to enhance the transport of reactive species away from the surface discharge and onto the target, thereby having a significant impact on the efficacy of these devices.…”

mentioning

confidence: 99%

EHD-driven mass transport enhancement in surface dielectric barrier discharges

Taglioli

Shaw

Wright

et al. 2016

Plasma Sources Sci. Technol.

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Atmospheric-pressure surface dielectric barrier discharges (S-DBDs) have been widely investigated in the past two decades for airflow manipulation due to their mechanical simplicity, electrical control capability and low power consumption [1]. In these devices, momentum transfer from charged to neutral particles results in an electrohydrodynamic (EHD) body force, a phenomenon also known as ionic wind. In its simplest implementation, the ionic wind imparts momentum to the background gas in the direction parallel to the dielectric surface [1,2]. Electrical and geometrical variations, however, can also produce fluxes in other directions [3,4].In addition to flow control applications, S-DBDs have gained renewed interest in recent years for their potential use in emerging biomedical, environmental and agricultural applications, such as hand cleaning [5], preparation of plasmaactivated water [6], ozone generation [7], seed treatment [8] and food preservation [9]. The plasma treatment in these systems is typically indirect and transport from the surface discharge to the sample being treated is normally assumed to be dominated by diffusion [6,10].Although all S-DBDs have the same underlying topology, namely two electrodes separated by a dielectric barrier, a number of different electrode designs, such as square [8], hexagonal [6], circular [11] and spiral [12] have been proposed in recent years. To date, however, limited attention has been paid to the influence of the electrode geometry on the efficacy of these S-DBDs, and here we report experimental results that demonstrate that the electrode pattern of the S-DBD can be

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mentioning

confidence: 99%

EHD-driven mass transport enhancement in surface dielectric barrier discharges

Taglioli

Shaw

Wright

et al. 2016

Plasma Sources Sci. Technol.

Self Cite

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“…The mixture of plasma-chemical reactions is very complex and the interaction of plasma with living organisms is even more complicated. However, a procedure has at least been proposed for an empirical comparison of the microbicidal activities of different plasma sources ( Shaw et al, 2015 ). The suggestion has also been pursued by our group several years ago ( Khun et al, 2017 ), but unfortunately this idea has not spread to the wider awareness of plasma physicists and this question therefore still remains unanswered.…”

Section: Discussionmentioning

confidence: 99%

Decontamination of High-Efficiency Mask Filters From Respiratory Pathogens Including SARS-CoV-2 by Non-thermal Plasma

Obrova

Vaňková

Sláma

et al. 2022

Front. Bioeng. Biotechnol.

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The current pandemic resulted in a rapidly increasing demand for personal protective equipment (PPE) initially leading to severe shortages of these items. Hence, during an unexpected and fast virus spread, the possibility of reusing highly efficient protective equipment could provide a viable solution for keeping both healthcare professionals and the general public equipped and protected. This requires an efficient decontamination technique that preserves functionality of the sensitive materials used for PPE production. Non-thermal plasma (NTP) is a decontamination technique with documented efficiency against select bacterial and fungal pathogens combined with low damage to exposed materials. We have investigated NTP for decontamination of high-efficiency P3 R filters from viral respiratory pathogens in comparison to other commonly used techniques. We show that NTP treatment completely inactivates SARS-CoV-2 and three other common human respiratory viruses including Influenza A, Rhinovirus and Adenovirus, revealing an efficiency comparable to 90°C dry heat or UVC light. Unlike some of the tested techniques (e.g., autoclaving), NTP neither influenced the filtering efficiency nor the microstructure of the filter. We demonstrate that NTP is a powerful and economic technology for efficient decontamination of protective filters and other sensitive materials from different respiratory pathogens.

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“…This fact is often also pointed out in other works but, so far, it does not seem to be remedied. The works of Shaw et al [ 75 ] and Khun et al [ 76 ] can be considered as one attempt to at least partially unify the methodology, where the authors tried to create a defined protocol enabling this comparison. Unfortunately, these works went unnoticed.…”

Section: Discussionmentioning

confidence: 99%

A Review of Microbial Decontamination of Cereals by Non-Thermal Plasma

Scholtz

Jirešová

Šerá

et al. 2021

Foods

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Cereals, an important food for humans and animals, may carry microbial contamination undesirable to the consumer or to the next generation of plants. Currently, non-thermal plasma (NTP) is often considered a new and safe microbicidal agent without or with very low adverse side effects. NTP is a partially or fully ionized gas at room temperature, typically generated by various electric discharges and rich in reactive particles. This review summarizes the effects of NTP on various types of cereals and products. NTP has undisputed beneficial effects with high potential for future practical use in decontamination and disinfection.

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A reference protocol for comparing the biocidal properties of gas plasma generating devices

Cited by 10 publications

References 33 publications

EHD-driven mass transport enhancement in surface dielectric barrier discharges

EHD-driven mass transport enhancement in surface dielectric barrier discharges

Decontamination of High-Efficiency Mask Filters From Respiratory Pathogens Including SARS-CoV-2 by Non-thermal Plasma

A Review of Microbial Decontamination of Cereals by Non-Thermal Plasma

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