1
|
Cadatal-Raduban M, Pope J, Olejníček J, Kohout M, Harrison JA, Hasan SMR. Ultraviolet-C Photoresponsivity Using Fabricated TiO 2 Thin Films and Transimpedance-Amplifier-Based Test Setup. SENSORS (BASEL, SWITZERLAND) 2022; 22:8176. [PMID: 36365873 PMCID: PMC9657381 DOI: 10.3390/s22218176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
We report on fabricated titanium dioxide (TiO2) thin films along with a transimpedance amplifier (TIA) test setup as a photoconductivity detector (sensor) in the ultraviolet-C (UV-C) wavelength region, particularly at 260 nm. TiO2 thin films deposited on high-resistivity undoped silicon-substrate at thicknesses of 100, 500, and 1000 nm exhibited photoresponsivities of 81.6, 55.6, and 19.6 mA/W, respectively, at 30 V bias voltage. Despite improvements in the crystallinity of the thicker films, the decrease in photocurrent, photoconductivity, photoconductance, and photoresponsivity in thicker films is attributed to an increased number of defects. Varying the thickness of the film can, however, be leveraged to control the wavelength response of the detector. Future development of a chip-based portable UV-C detector using TiO2 thin films will open new opportunities for a wide range of applications.
Collapse
Affiliation(s)
- Marilou Cadatal-Raduban
- School of Natural Sciences, Massey University, Auckland 0632, New Zealand
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita 565-0871, Osaka, Japan
| | - Jade Pope
- School of Natural Sciences, Massey University, Auckland 0632, New Zealand
| | - Jiří Olejníček
- Department of Low Temperature Plasma, Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague 8, Czech Republic
| | - Michal Kohout
- Department of Low Temperature Plasma, Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague 8, Czech Republic
| | - John A. Harrison
- School of Natural Sciences, Massey University, Auckland 0632, New Zealand
| | - S. M. Rezaul Hasan
- Center for Research in Analog and VLSI Microsystem Design, Massey University, Auckland 0632, New Zealand
| |
Collapse
|
2
|
Bello-Perez M, Esparza I, De la Encina A, Bartolome T, Molina T, Sanjuan E, Falco A, Enjuanes L, Sola I, Usera F. Pulsed-Xenon Ultraviolet Light Highly Inactivates Human Coronaviruses on Solid Surfaces, Particularly SARS-CoV-2. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph192113780. [PMID: 36360660 PMCID: PMC9653743 DOI: 10.3390/ijerph192113780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 05/27/2023]
Abstract
In the context of ongoing and future pandemics, non-pharmaceutical interventions are critical in reducing viral infections and the emergence of new antigenic variants while the population reaches immunity to limit viral transmission. This study provides information on efficient and fast methods of disinfecting surfaces contaminated with different human coronaviruses (CoVs) in healthcare settings. The ability to disinfect three different human coronaviruses (HCoV-229E, MERS-CoV, and SARS-CoV-2) on dried surfaces with light was determined for a fully characterized pulsed-xenon ultraviolet (PX-UV) source. Thereafter, the effectiveness of this treatment to inactivate SARS-CoV-2 was compared to that of conventional low-pressure mercury UVC lamps by using equivalent irradiances of UVC wavelengths. Under the experimental conditions of this research, PX-UV light completely inactivated the CoVs tested on solid surfaces since the infectivity of the three CoVs was reduced up to 4 orders of magnitude by PX-UV irradiation, with a cumulated dose of as much as 21.162 mJ/cm2 when considering all UV wavelengths (5.402 mJ/cm2 of just UVC light). Furthermore, continuous irradiation with UVC light was less efficient in inactivating SARS-CoV-2 than treatment with PX-UV light. Therefore, PX-UV light postulates as a promising decontamination measure to tackle the propagation of future outbreaks of CoVs.
Collapse
Affiliation(s)
- Melissa Bello-Perez
- Department of Molecular and Cell Biology, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Iris Esparza
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Arancha De la Encina
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Teresa Bartolome
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Teresa Molina
- CandelTEC S.L. Pol. Industrial L’Horta Vella, 8, 6, 46117 Betera, Spain
| | - Elena Sanjuan
- CandelTEC S.L. Pol. Industrial L’Horta Vella, 8, 6, 46117 Betera, Spain
| | - Alberto Falco
- Institute of Research, Development and Innovation in Healthcare Biotechnology in Elche (IDiBE), Miguel Hernández University (UMH), 03202 Elche, Spain
| | - Luis Enjuanes
- Department of Molecular and Cell Biology, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Isabel Sola
- Department of Molecular and Cell Biology, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Fernando Usera
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| |
Collapse
|
3
|
Enaki NA, Paslari T, Bazgan S, Starodub E, Munteanu I, Turcan M, Eremeev V, Profir A, Mihailescu IN. UVC radiation intensity dependence of pathogen decontamination rate: semiclassical theory and experiment. EUROPEAN PHYSICAL JOURNAL PLUS 2022; 137:1047. [PMID: 36123970 PMCID: PMC9476412 DOI: 10.1140/epjp/s13360-022-03252-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
A semiclassical (light classical and molecule quantum) model describing the dependence of DNA/RNA dimerization rate as function of the ultraviolet C (UVC) radiation's intensity is proposed. Particularly, a nonlinear model is developed based on the Raman-like processes in quantum optics. The main result of the theory shows that the process of dimerization in the DNA/RNA depends strongly on the UVC light's intensity, thus proving a possible quantum microscopical mechanism of the interaction of UV light with the DNA. To corroborate the theoretical findings, we realize some experiments, by which want to investigate how the inactivation rate of the yeast colonies depends on the intensity of the UVC irradiation. The experimental results evidence a nonlinear decreasing of the residual yeast colonies as a function of the intensity in the irradiation process. The possibilities to optimize the intensity of UVC radiation in the considered decontamination equipment by using metamaterials are studied. The application of such equipment in disinfection of fluids (air, water, droplets, etc.), as well for the SARS-CoV-2-infected aerosols, is discussed.
Collapse
Affiliation(s)
- Nicolae A. Enaki
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
| | - Tatiana Paslari
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
| | - Sergiu Bazgan
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
| | - Elena Starodub
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
| | - Ion Munteanu
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
| | - Marina Turcan
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
| | - Vitalie Eremeev
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
- Instituto de Ciencias Básicas, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
| | - Aurelia Profir
- Quantum Optics and Kinetic Processes Lab of Institute of Applied Physics of Moldova, Chisinau, MD 2028 Republic of Moldova
- Moldova State University Department of Computer Science, 60 Alexei Mateevici str., Chisinau, MD-2009 Republic of Moldova
| | - Ion N. Mihailescu
- National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG 36, 77125 Bucharest-Magurele, Romania
| |
Collapse
|
4
|
Inactivating SARS-CoV-2 Surrogates on Surfaces Using Engineered Water Nanostructures Incorporated with Nature Derived Antimicrobials. NANOMATERIALS 2022; 12:nano12101735. [PMID: 35630957 PMCID: PMC9146109 DOI: 10.3390/nano12101735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 12/30/2022]
Abstract
The continuing cases of COVID-19 due to emerging strains of the SARS-CoV-2 virus underscore the urgent need to develop effective antiviral technologies. A crucial aspect of reducing transmission of the virus is through environmental disinfection. To this end, a nanotechnology-based antimicrobial platform utilizing engineered water nanostructures (EWNS) was utilized to challenge the human coronavirus 229E (HCoV-229E), a surrogate of SARS-CoV-2, on surfaces. The EWNS were synthesized using electrospray and ionization of aqueous solutions of antimicrobials, had a size in the nanoscale, and contained both antimicrobial agents and reactive oxygen species (ROS). Various EWNS were synthesized using single active ingredients (AI) as well as their combinations. The results of EWNS treatment indicate that EWNS produced with a cocktail of hydrogen peroxide, citric acid, lysozyme, nisin, and triethylene glycol was able to inactivate 3.8 logs of HCoV-229E, in 30 s of treatment. The delivered dose of antimicrobials to the surface was measured to be in pico to nanograms. These results indicate the efficacy of EWNS technology as a nano-carrier for delivering a minuscule dose while inactivating HCoV-229E, making this an attractive technology against SARS-CoV-2.
Collapse
|
5
|
Ezzatpanah H, Gómez‐López VM, Koutchma T, Lavafpour F, Moerman F, Mohammadi M, Raheem D. New food safety challenges of viral contamination from a global perspective: Conventional, emerging, and novel methods of viral control. Compr Rev Food Sci Food Saf 2022; 21:904-941. [DOI: 10.1111/1541-4337.12909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 12/11/2022]
Affiliation(s)
- Hamid Ezzatpanah
- Department of Food Science and Technology, Science and Research Branch Islamic Azad University Tehran Iran
| | | | - Tatiana Koutchma
- Guelph Research and Development Center Agriculture and Agri‐Food Canada Guelph Ontario Canada
| | | | - Frank Moerman
- Department of Chemistry Catholic University of Leuven ‐ KU Leuven Leuven Belgium
| | | | - Dele Raheem
- Arctic Centre (NIEM) University of Lapland Rovaniemi Finland
| |
Collapse
|
6
|
Pulsed Light (PL) Treatments on Almond Kernels: Salmonella enteritidis Inactivation Kinetics and Infrared Thermography Insights. FOOD BIOPROCESS TECH 2021; 14:2323-2335. [PMID: 34751231 PMCID: PMC8566968 DOI: 10.1007/s11947-021-02725-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 10/22/2021] [Indexed: 11/05/2022]
Abstract
Abstract Extending the shelf-life and ensuring microbiological safety of food products while preserving the nutritional properties are key aspects that must be addressed. Heat processing of food matrices has been the golden standard during the last decades, while certain non-thermal processing options have recently gained ground. In the present study, experimental pulsed light (PL) surface inactivation treatments of Salmonella enteritidis on almonds kernels are performed. The PL system is set to test different operative conditions, namely power (1000, 1250, and 1500 W) and frequency (1.8, 3.0, and 100.0 Hz) at different treatment times (from 5 to 250 s), which result in applied fluence doses in the 0–100 J·cm−2 range. Additionally, temperature measurements are collected at each operative condition on the almond surface (using infrared (IR) thermography) and at the superficial layer of the almond (1-mm depth using a thermocouple). The observed PL inactivation kinetics are then modelled using four different models. The best goodness-of-fit is found for the two-parameter Weibull model (R2 > 0.98 and RMSE < 0.33 for all cases). The maximum achieved log-CFU reductions are 6.02 for the 1.8-Hz system, 4.69 for the 3.0-Hz system, and 3.66 for 100.0-Hz system. The offset between the collected temperature readings by the two sensors is contrasted against the inactivation rate (following the two-parameter Weibull model). It was found that the highest inactivation rate corresponds approximately to the point where the infrared camera detects a slowdown in the surface heating. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s11947-021-02725-9.
Collapse
|
7
|
Rybak K, Wiktor A, Pobiega K, Witrowa-Rajchert D, Nowacka M. Impact of pulsed light treatment on the quality properties and microbiological aspects of red bell pepper fresh-cuts. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111906] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|