Inactivation characteristics of a 280 nm Deep-UV irradiation dose on aerosolized SARS-CoV-2

Takamure, Kotaro; Iwatani, Yoshinori; Amano, Hiroshi; Yagi, Tetsuya; Uchiyama, Tomomi

doi:10.1016/j.envint.2023.108022

Cited by 2 publications

(1 citation statement)

References 55 publications

(76 reference statements)

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“…Although they suggest further experiments are needed to establish a firm dose–response curve, this measurement would imply a UV susceptibility of > 1.3 m 2 /J. Only a few other studies on the sensitivity of aerosolized SARS-CoV-2 to different UV-C wavelengths (222 nm, 265 nm, and 280 nm) have been published 17 , 18 , 20 , 32 , 33 . For the relatively close wavelength of 265 nm, Ueki et al 18 reported a reduction of 90%, 99% and 99.9% for doses of 2.3 J/m 2 , 4.0 J/m 2 and 10.4 J/m 2 respectively.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

van der Schans,

Yu,

de Vries

et al. 2024

Sci Rep

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The recent COVID-19 pandemic has raised interest in efficient air disinfection solutions. The application of germicidal ultraviolet (GUV) irradiation is an excellent contender to prevent airborne transmission of COVID-19, as well as other existing and future infectious airborne diseases. While GUV has already been proven effective in inactivating SARS-CoV-2, quantitative data on UV susceptibility and dose requirements, needed to predict and optimize the performance of GUV solutions, is still limited. In this study, the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm ultraviolet (UV) irradiation is investigated. This is done by employing 3D computational fluid dynamics based simulations of SARS-CoV-2 inactivation in a test chamber equipped with an upper-room UV-C luminaire and comparing the results to previously published measurements performed in the same test chamber. The UV susceptibility found in this study is (0.6 ± 0.2) m2/J, which is equivalent to a D90 dose between 3 and 6 J/m2. These values are in the same range as previous estimations based on other corona viruses and inactivation data reported in literature.

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Section: Introductionmentioning

confidence: 99%

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

van der Schans,

Yu,

de Vries

et al. 2024

Sci Rep

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A Review of Recent Research Advances on AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

Huang,

Li,

Xiang

2024

IEEE Access

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Due to environmental friendliness, small size, long lifetime, and adjustable light-emitting wavelength, AlGaN-based deep ultraviolet light-emitting diodes (DUV-LEDs) have great development potential in the fields of biochemical detection, sterilization and disinfection, and non-line-of-sight communication. After decades of research, AlGaN-based DUV-LEDs have significantly improved in the direction of luminous efficiency. However, the luminous efficiency of the present AlGaN-based DUV-LEDs is still at a low level compared with that of the fully commercialised nitride blue LEDs, making it difficult to meet the market demand. This paper first introduces the present development status of AlGaN-based DUV-LEDs and the reasons for the low luminous efficiency. Then from the preparation of AlGaN-based, AlGaN doping and the design of AlGaN-based DUV-LEDs structure to elaborate the research progress in recent years in the direction of improving the luminous efficiency of AlGaN-based DUV-LEDs. Finally discusses the challenges that the AlGaN-based DUV-LEDs are presently faced with, and their future opportunities for development. INDEX TERMS AlGaN-based DUV-LEDs;luminous efficiency;AlGaN-based;AlGaN doping;AlGaNbased DUV-LEDs structure I. INTRODUCTION

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Inactivation characteristics of a 280 nm Deep-UV irradiation dose on aerosolized SARS-CoV-2

Cited by 2 publications

References 55 publications

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

Estimation of the UV susceptibility of aerosolized SARS-CoV-2 to 254 nm irradiation using CFD-based room disinfection simulations

A Review of Recent Research Advances on AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

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