Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma
In this study, plasma gas species and temperature were varied to evaluate the reactive species produced and the bactericidal effect of plasma. Nitrogen, carbon dioxide, oxygen, and argon were used as the gas species, and the gas temperature of each plasma was varied from 30 to 90 °C. Singlet oxygen,...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/24/11674 |
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| author | Yuma Suenaga Toshihiro Takamatsu Toshiki Aizawa Shohei Moriya Yuriko Matsumura Atsuo Iwasawa Akitoshi Okino |
| author_facet | Yuma Suenaga Toshihiro Takamatsu Toshiki Aizawa Shohei Moriya Yuriko Matsumura Atsuo Iwasawa Akitoshi Okino |
| author_sort | Yuma Suenaga |
| collection | DOAJ |
| description | In this study, plasma gas species and temperature were varied to evaluate the reactive species produced and the bactericidal effect of plasma. Nitrogen, carbon dioxide, oxygen, and argon were used as the gas species, and the gas temperature of each plasma was varied from 30 to 90 °C. Singlet oxygen, OH radicals, hydrogen peroxide, and ozone generated by the plasma were trapped in a liquid, and then measured. Nitrogen plasma produced up to 172 µM of the OH radical, which was higher than that of the other plasmas. In carbon dioxide plasma, the concentration of singlet oxygen increased from 77 to 812 µM, as the plasma gas temperature increased from 30 to 90 °C. The bactericidal effect of carbon dioxide and nitrogen plasma was evaluated using bactericidal ability, which indicated the log reduction per minute. In carbon dioxide plasma, the bactericidal ability increased from 5.6 to 38.8, as the temperature of the plasma gas increased from 30 to 90 °C. Conversely, nitrogen plasma did not exhibit a high bactericidal effect. These results demonstrate that the plasma gas type and temperature have a significant influence on the reactive species produced and the bactericidal effect of plasma. |
| first_indexed | 2024-03-10T04:37:34Z |
| format | Article |
| id | doaj.art-52c71d891de0400db1627f90be2adddc |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T04:37:34Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-52c71d891de0400db1627f90be2adddc2023-11-23T03:36:34ZengMDPI AGApplied Sciences2076-34172021-12-0111241167410.3390/app112411674Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the PlasmaYuma Suenaga0Toshihiro Takamatsu1Toshiki Aizawa2Shohei Moriya3Yuriko Matsumura4Atsuo Iwasawa5Akitoshi Okino6Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, JapanResearch Institute for Biomedical Sciences, Tokyo University of Science, 2669 Yamazaki, Noda 278-0022, JapanLaboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, JapanLaboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, JapanDivision of Infection Prevention and Control, Tokyo Healthcare University, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo 141-8648, JapanDivision of Infection Prevention and Control, Tokyo Healthcare University, 4-1-17 Higashi-Gotanda, Shinagawa-ku, Tokyo 141-8648, JapanLaboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, J2-32, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, JapanIn this study, plasma gas species and temperature were varied to evaluate the reactive species produced and the bactericidal effect of plasma. Nitrogen, carbon dioxide, oxygen, and argon were used as the gas species, and the gas temperature of each plasma was varied from 30 to 90 °C. Singlet oxygen, OH radicals, hydrogen peroxide, and ozone generated by the plasma were trapped in a liquid, and then measured. Nitrogen plasma produced up to 172 µM of the OH radical, which was higher than that of the other plasmas. In carbon dioxide plasma, the concentration of singlet oxygen increased from 77 to 812 µM, as the plasma gas temperature increased from 30 to 90 °C. The bactericidal effect of carbon dioxide and nitrogen plasma was evaluated using bactericidal ability, which indicated the log reduction per minute. In carbon dioxide plasma, the bactericidal ability increased from 5.6 to 38.8, as the temperature of the plasma gas increased from 30 to 90 °C. Conversely, nitrogen plasma did not exhibit a high bactericidal effect. These results demonstrate that the plasma gas type and temperature have a significant influence on the reactive species produced and the bactericidal effect of plasma.https://www.mdpi.com/2076-3417/11/24/11674atmospheric low-temperature plasmareactive speciesplasma disinfection |
| spellingShingle | Yuma Suenaga Toshihiro Takamatsu Toshiki Aizawa Shohei Moriya Yuriko Matsumura Atsuo Iwasawa Akitoshi Okino Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma Applied Sciences atmospheric low-temperature plasma reactive species plasma disinfection |
| title | Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma |
| title_full | Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma |
| title_fullStr | Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma |
| title_full_unstemmed | Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma |
| title_short | Influence of Controlling Plasma Gas Species and Temperature on Reactive Species and Bactericidal Effect of the Plasma |
| title_sort | influence of controlling plasma gas species and temperature on reactive species and bactericidal effect of the plasma |
| topic | atmospheric low-temperature plasma reactive species plasma disinfection |
| url | https://www.mdpi.com/2076-3417/11/24/11674 |
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