Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays
Some medical and industry workers using ionizing radiation sources have potential risks of accidental high-dose exposure of their extremities, particularly their hands. While practical dosimeters suitable for on-site real-time monitoring of hand exposure are not yet available, they are desirable to...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/6/2959 |
| _version_ | 1797472987744567296 |
|---|---|
| author | Hiroshi Yasuda Hirokazu Miyoshi |
| author_facet | Hiroshi Yasuda Hirokazu Miyoshi |
| author_sort | Hiroshi Yasuda |
| collection | DOAJ |
| description | Some medical and industry workers using ionizing radiation sources have potential risks of accidental high-dose exposure of their extremities, particularly their hands. While practical dosimeters suitable for on-site real-time monitoring of hand exposure are not yet available, they are desirable to be developed. Thus, the authors focused on the application of a reusable radiochromic complex composed of polyvinyl alcohol, iodide and silica nanoparticles, named “PAISiN”, and examined their dose responses and thermal stabilities of radiochromic reactions. Three PAISiN samples each were irradiated with 5, 10 and 20 Gy of <sup>137</sup>Cs γ-rays, and time changes of the radiation-induced colors were observed at different temperatures: 20 °C (in a laboratory), 40 °C (in an oven) and 5.5 °C (in a refrigerator). It was confirmed that the PAISiN samples presented a red color that was easily detectable by the naked eyesight immediately after irradiation. The coloration was cleared within 24 h for 5 Gy irradiation at room temperature. The decolorization process was remarkably accelerated at 40 °C; it was erased in just 2 h. In contrast, storing in the refrigerator (5.5 °C) kept the color persistently for at least 4 days. These findings indicate that we could flexibly control the decolorization process of PAISiN in accordance with the objective of radiation monitoring. |
| first_indexed | 2024-03-09T20:09:50Z |
| format | Article |
| id | doaj.art-8b6ad42ee90d41d29873b396019dd61a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T20:09:50Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-8b6ad42ee90d41d29873b396019dd61a2023-11-24T00:21:42ZengMDPI AGApplied Sciences2076-34172022-03-01126295910.3390/app12062959Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-raysHiroshi Yasuda0Hirokazu Miyoshi1Department of Radiation Biophysics, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, JapanAdvance Radiation Research, Education, and Management Center, Tokushima University, Tokushima 770-8501, JapanSome medical and industry workers using ionizing radiation sources have potential risks of accidental high-dose exposure of their extremities, particularly their hands. While practical dosimeters suitable for on-site real-time monitoring of hand exposure are not yet available, they are desirable to be developed. Thus, the authors focused on the application of a reusable radiochromic complex composed of polyvinyl alcohol, iodide and silica nanoparticles, named “PAISiN”, and examined their dose responses and thermal stabilities of radiochromic reactions. Three PAISiN samples each were irradiated with 5, 10 and 20 Gy of <sup>137</sup>Cs γ-rays, and time changes of the radiation-induced colors were observed at different temperatures: 20 °C (in a laboratory), 40 °C (in an oven) and 5.5 °C (in a refrigerator). It was confirmed that the PAISiN samples presented a red color that was easily detectable by the naked eyesight immediately after irradiation. The coloration was cleared within 24 h for 5 Gy irradiation at room temperature. The decolorization process was remarkably accelerated at 40 °C; it was erased in just 2 h. In contrast, storing in the refrigerator (5.5 °C) kept the color persistently for at least 4 days. These findings indicate that we could flexibly control the decolorization process of PAISiN in accordance with the objective of radiation monitoring.https://www.mdpi.com/2076-3417/12/6/2959radiochromicpolyvinyl alcoholiodinesilica nanoparticlesreusablegel dosimeter |
| spellingShingle | Hiroshi Yasuda Hirokazu Miyoshi Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays Applied Sciences radiochromic polyvinyl alcohol iodine silica nanoparticles reusable gel dosimeter |
| title | Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays |
| title_full | Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays |
| title_fullStr | Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays |
| title_full_unstemmed | Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays |
| title_short | Thermally Controllable Decolorization of Reusable Radiochromic Complex of Polyvinyl Alcohol, Iodine and Silica Nanoparticles (PAISiN) Irradiated with γ-rays |
| title_sort | thermally controllable decolorization of reusable radiochromic complex of polyvinyl alcohol iodine and silica nanoparticles paisin irradiated with γ rays |
| topic | radiochromic polyvinyl alcohol iodine silica nanoparticles reusable gel dosimeter |
| url | https://www.mdpi.com/2076-3417/12/6/2959 |
| work_keys_str_mv | AT hiroshiyasuda thermallycontrollabledecolorizationofreusableradiochromiccomplexofpolyvinylalcoholiodineandsilicananoparticlespaisinirradiatedwithgrays AT hirokazumiyoshi thermallycontrollabledecolorizationofreusableradiochromiccomplexofpolyvinylalcoholiodineandsilicananoparticlespaisinirradiatedwithgrays |