Epitaxial Core/Shell Nanocrystals of (Europium-Doped) Zirconia and Hafnia

A careful design of the nanocrystal architecture can strongly enhance the nanocrystal function. So far, this strategy has faced a synthetic bottleneck in the case of refractory oxides. Here we demonstrate the epitaxial growth of hafnia shells onto zirconia cores and pure zirconia shells onto europiu...

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Bibliographic Details
Published in:	Journal of the American Chemical Society Vol. 146; no. 30; pp. 20550 - 20555
Main Authors:	Seno, Carlotta, Reichholf, Nico, Salutari, Francesco, Spadaro, Maria Chiara, Ivanov, Yurii P., Divitini, Giorgio, Gogos, Alexander, Herrmann, Inge K., Arbiol, Jordi, Smet, Philippe F., De Roo, Jonathan
Format:	Journal Article
Language:	English
Published:	United States American Chemical Society 31-07-2024 American Chemical Society (ACS)
Subjects:	Chemistry Communication
Online Access:	Get full text
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Summary:	A careful design of the nanocrystal architecture can strongly enhance the nanocrystal function. So far, this strategy has faced a synthetic bottleneck in the case of refractory oxides. Here we demonstrate the epitaxial growth of hafnia shells onto zirconia cores and pure zirconia shells onto europium-doped zirconia cores. The core/shell structures are fully crystalline. Upon shelling, the optical properties of the europium dopant are dramatically improved (featuring a more uniform coordination and a longer photoluminescence lifetime), indicating the suppression of nonradiative pathways. These results launch the stable zirconium and hafnium oxide hosts as alternatives for the established NaYF4 systems.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 AC02-06CH11357 USDOE
ISSN:	0002-7863 1520-5126 1520-5126
DOI:	10.1021/jacs.4c05037