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Ferromagnetic stability optimization via oxygen-vacancy control in single-atom Co/TiO2 nanostructures
DC Field | Value | Language |
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dc.contributor.author | Paidi, Vinod K. | - |
dc.contributor.author | Lee, Byoung-Hoon | - |
dc.contributor.author | Lee, Alex Taekyung | - |
dc.contributor.author | Ismail-Beigi, Sohrab | - |
dc.contributor.author | Grishaeva, Elizaveta | - |
dc.contributor.author | Vasala, Sami | - |
dc.contributor.author | Glatzel, Pieter | - |
dc.contributor.author | Ko, Wonjae | - |
dc.contributor.author | Ahn, Docheon | - |
dc.contributor.author | Hyeon, Taeghwan | - |
dc.contributor.author | Kim, Younghak | - |
dc.contributor.author | Lee, Kug-Seung | - |
dc.date.accessioned | 2024-12-11T06:04:25Z | - |
dc.date.available | 2024-12-11T06:04:25Z | - |
dc.date.created | 2024-12-11 | - |
dc.date.created | 2024-12-11 | - |
dc.date.issued | 2024-11 | - |
dc.identifier.citation | Proceedings of the National Academy of Sciences of the United States of America, Vol.121 No.48, p. e2409397121 | - |
dc.identifier.issn | 0027-8424 | - |
dc.identifier.uri | https://hdl.handle.net/10371/213551 | - |
dc.description.abstract | Oxygen vacancies and their correlation with the nanomagnetism and electronic structure are crucial for applications in dilute magnetic semiconductors design applications. Here, we report on cobalt single atom-incorporated titanium dioxide (TiO2) monodispersed nanoparticles synthesized using a thermodynamic redistribution strategy. Using advanced synchrotron-based X-ray techniques and simulations, we find trivalent titanium is absent, indicating trivalent cations do not influence ferromagnetic (FM) stability. Density functional theory calculations show that the FM stability between Co2+ ions is very weak. However, electron doping from additional oxygen vacancies can significantly enhance this FM stability, which explains the observed room-temperature ferromagnetism. Moreover, our calculations illustrate enhanced FM interactions between CoTi + VO complexes with additional oxygen vacancies. This study explores the electronic structure and room-temperature ferromagnetism using monodispersed nanocrystallites with single-atom-incorporated TiO2 nanostructures. The strategies described herein offer promise in revealing magnetism in other single-atom-incorporated nanostructures. | - |
dc.language | 영어 | - |
dc.publisher | National Academy of Sciences | - |
dc.title | Ferromagnetic stability optimization via oxygen-vacancy control in single-atom Co/TiO2 nanostructures | - |
dc.type | Article | - |
dc.identifier.doi | 10.1073/pnas.2409397121 | - |
dc.citation.journaltitle | Proceedings of the National Academy of Sciences of the United States of America | - |
dc.identifier.wosid | 001369446500002 | - |
dc.identifier.scopusid | 2-s2.0-85210049671 | - |
dc.citation.number | 48 | - |
dc.citation.startpage | e2409397121 | - |
dc.citation.volume | 121 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Hyeon, Taeghwan | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | X-RAY-ABSORPTION | - |
dc.subject.keywordPlus | TITANIUM | - |
dc.subject.keywordPlus | TIO2 | - |
dc.subject.keywordPlus | SPECTROSCOPY | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | CE3+ | - |
dc.subject.keywordAuthor | oxygen vacancy | - |
dc.subject.keywordAuthor | room-temperature ferromagnetism | - |
dc.subject.keywordAuthor | single-atom-incorporated TiO2 nanostructures | - |
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