Ultraviolet Luminescence of ZnO Whiskers, Nanowalls, Multipods, and Ceramics as Potential Materials for Fast Scintillators
| Autor: | Piotr A. Rodnyi, E. I. Gorokhova, L. A. Zadorozhnaya, A. E. Muslimov, Andrey P. Tarasov, V. M. Kanevsky, I. D. Venevtsev |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Photoluminescence near-band-edge luminescence Whiskers whiskers 02 engineering and technology ceramics medicine.disease_cause 01 natural sciences Article multipods radioluminescence 0103 physical sciences Transmittance medicine General Materials Science Ceramic fast scintillators 010302 applied physics Microscopy QC120-168.85 X-ray induced luminescence business.industry Doping QH201-278.5 zinc oxide Radioluminescence 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) TK1-9971 nanowalls Descriptive and experimental mechanics visual_art visual_art.visual_art_medium Optoelectronics total optical transmittance photoluminescence Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology business Luminescence Ultraviolet |
| Zdroj: | Materials, Vol 14, Iss 2001, p 2001 (2021) Materials Volume 14 Issue 8 |
| ISSN: | 1996-1944 |
| Popis: | The presented work is dedicated to the study and comparison of scintillating properties of zinc oxide samples prepared in different morphologies: whiskers, nanowalls, multipods, and ceramics. It was shown that total transmittance, photo- and radioluminescence spectra, and radioluminescence kinetics can vary significantly depending on sample structure and preparation conditions. The highest total transmittance was registered for ZnO ceramics (> 50% at 0.5 mm thickness). Differences in the transmittance of whiskers, nanowalls, and multipods can be attributed to their shape and thickness which affects the amount of light refraction and scattering. The study of radioluminescence demonstrated that all samples, except undoped ceramics and air annealed whiskers, have predominantly fast luminescence with a decay time < 1 ns. High transmittance of ceramics opens the way for their use in the registration of high energy X-ray and gamma radiation, where a large volume of scintillators is required. In cases, where large scintillator thickness is not a necessity, one may prefer to use other ZnO structures, such as ensembles of whiskers and nanowalls. Studies of near-band-edge luminescence components at low temperatures showed that the structure is quite similar in all samples except Ga doped ceramics. |
| Databáze: | OpenAIRE |
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