Salvato in:
| Autori principali: | , , , , , , , , |
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| Natura: | Recurso digital |
| Lingua: | |
| Pubblicazione: |
Zenodo
2026
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| Accesso online: | https://doi.org/10.1557/s43577-025-00973-0 |
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Sommario:
- <p><span>Zinc oxide nanoparticles were successfully synthesized in poly(vinyl alcohol) (PVA) media using a modified coprecipitation method and a green chemistry approach. Singlephase ZnO samples with wurtzite structure were formed already at 400°C. The polymer media forms agglomerating clouds around the ZnO nanoparticles. Average nanoparticle size has a tendency to decrease with the PVA content. Visible photoluminescence and radioluminescence emission spectra of the pure ZnO and ZnO-</span><em><span>x</span></em><span>PVA revealed strong differences. The spectra of pure ZnO samples contain components at 385 and 510 nm corresponded to excitonic and defect-related emission, respectively. Spectra of the ZnO-xPVA samples are dominated by a band peaked in the red spectral region. This band consists of two components at 630 and 720 nm that are assigned to recombination transitions from Zn</span><span>i </span><span>and H</span><span>i </span><span>to O</span><span>i </span><span>defect energy levels, respectively. These results demonstrate that</span><span> </span><span>luminescence of ZnO can be tailored by manipulating defect configurations, even without high-temperature processing.</span></p>