Articolul precedent |
Articolul urmator |
235 0 |
SM ISO690:2012 LUPAN, Cristian, BÎRNAZ, Adrian, BUZDUGAN, Artur, MAGARIU, Nicolae, LUPAN, Oleg. Gamma Radiation Sensitization of ZnO/Al2O3 Sensors Based on Nanoheterostructures. In: IFMBE Proceedings: . 6th International Conference on Nanotechnologies and Biomedical Engineering , Ed. 6, 20-23 septembrie 2023, Chişinău. Chişinău: Springer Science and Business Media Deutschland GmbH, 2024, Ediția 6, Vol.91, pp. 22-30. ISBN 978-303142774-9. ISSN 16800737. DOI: https://doi.org/10.1007/978-3-031-42775-6_3 |
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IFMBE Proceedings Ediția 6, Vol.91, 2024 |
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Conferința "6th International Conference on Nanotechnologies and Biomedical Engineering" 6, Chişinău, Moldova, 20-23 septembrie 2023 | ||||||
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DOI:https://doi.org/10.1007/978-3-031-42775-6_3 | ||||||
Pag. 22-30 | ||||||
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Rezumat | ||||||
Reliable detection of dangerous gases by using devices based on semiconductor materials in environments, with different influencing factors, such as gamma radiation, is a challenge for a medical facility or space program. A study of the influence of gamma radiation on the electrical and sensing properties of ZnO/Al2O3 core@shell heterostructure has been carried out in this work. Using as radiation source Cs-137, a low level of ionizing radiation was applied. It was observed that gamma irradiation did not affect the electrical resistance in real time measurements, but changes have been observed once comparing I-V characteristics before and after measurements. Initial gas tests showed that ZnO/Al2O3 heterostructure does not detect volatile organic compounds (VOC) gases in the operating temperature range between 150–200 ℃ and gas concentration up to 100 ppm. Further gas sensing tests, after irradiation, showed that the experimental results are of interest for the gas sensors development based on the ZnO/Al2O3 heterostructure, showing an increase in response value by more than 100% and 200% for 100 ppm 2-propanol and n-butanol VOC gases at operating temperature of 200 and 250 ℃, respectively. These findings can be used for further development of gas sensors in environments with gamma radiation field and for biomedical applications too. |
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Cuvinte-cheie aluminum oxide, Gamma Irradiation, gas sensors, Heterostructure, zinc oxide |
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