Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties
This research work describes the synthesis of ZnO nanostructures doped with Ho<sup>3+</sup> ions using a conventional sol–gel synthesis method. The nanostructured produced exhibited a wurtzite hexagonal structure in both ZnO and ZnO:Ho<sup>3+</sup> (0.25, 0.5, 0.75 mol%) samp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/10/2611 |
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| author | Guy L. Kabongo Gugu H. Mhlongo Mokhotjwa S. Dhlamini |
| author_facet | Guy L. Kabongo Gugu H. Mhlongo Mokhotjwa S. Dhlamini |
| author_sort | Guy L. Kabongo |
| collection | DOAJ |
| description | This research work describes the synthesis of ZnO nanostructures doped with Ho<sup>3+</sup> ions using a conventional sol–gel synthesis method. The nanostructured produced exhibited a wurtzite hexagonal structure in both ZnO and ZnO:Ho<sup>3+</sup> (0.25, 0.5, 0.75 mol%) samples. The change in morphology with addition of Ho<sup>3+</sup> dopants was observed, which was assigned to Ostwald ripening effect occurring during the nanoparticles’ growth. The photoluminescence emission properties of the doped samples revealed that Ho<sup>3+</sup> was emitting through its electronic transitions. Moreover, reduced surface defects were observed in the Holmium doped samples whose analysis was undertaken using an X-ray Photoelectron Spectroscopy (XPS) technique. Finally, enhanced room temperature ferromagnetism (RT-FM) for Ho<sup>3+</sup>-doped ZnO (0.5 mol%) samples with a peak-to-peak line width of 452 G was detected and found to be highly correlated to the UV–VIS transmittance results. |
| first_indexed | 2024-03-10T06:19:22Z |
| format | Article |
| id | doaj.art-936ec9f1ff5442f7bece4bbceba50338 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T06:19:22Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-936ec9f1ff5442f7bece4bbceba503382023-11-22T19:23:59ZengMDPI AGNanomaterials2079-49912021-10-011110261110.3390/nano11102611Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic PropertiesGuy L. Kabongo0Gugu H. Mhlongo1Mokhotjwa S. Dhlamini2Department of Physics, University of South Africa, P.O. Box 392, Pretoria 0003, South AfricaCSIR-National Centre for Nano-Structured Materials, P.O. Box 395, Pretoria 0001, South AfricaDepartment of Physics, University of South Africa, P.O. Box 392, Pretoria 0003, South AfricaThis research work describes the synthesis of ZnO nanostructures doped with Ho<sup>3+</sup> ions using a conventional sol–gel synthesis method. The nanostructured produced exhibited a wurtzite hexagonal structure in both ZnO and ZnO:Ho<sup>3+</sup> (0.25, 0.5, 0.75 mol%) samples. The change in morphology with addition of Ho<sup>3+</sup> dopants was observed, which was assigned to Ostwald ripening effect occurring during the nanoparticles’ growth. The photoluminescence emission properties of the doped samples revealed that Ho<sup>3+</sup> was emitting through its electronic transitions. Moreover, reduced surface defects were observed in the Holmium doped samples whose analysis was undertaken using an X-ray Photoelectron Spectroscopy (XPS) technique. Finally, enhanced room temperature ferromagnetism (RT-FM) for Ho<sup>3+</sup>-doped ZnO (0.5 mol%) samples with a peak-to-peak line width of 452 G was detected and found to be highly correlated to the UV–VIS transmittance results.https://www.mdpi.com/2079-4991/11/10/2611ZnOholmiumnanostructuresferromagnetismXPS |
| spellingShingle | Guy L. Kabongo Gugu H. Mhlongo Mokhotjwa S. Dhlamini Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties Nanomaterials ZnO holmium nanostructures ferromagnetism XPS |
| title | Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties |
| title_full | Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties |
| title_fullStr | Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties |
| title_full_unstemmed | Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties |
| title_short | Unveiling Semiconductor Nanostructured Based Holmium-Doped ZnO: Structural, Luminescent and Room Temperature Ferromagnetic Properties |
| title_sort | unveiling semiconductor nanostructured based holmium doped zno structural luminescent and room temperature ferromagnetic properties |
| topic | ZnO holmium nanostructures ferromagnetism XPS |
| url | https://www.mdpi.com/2079-4991/11/10/2611 |
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