%0 Journal Article
%A Seno, Carlotta
%A Reichholf, Nico
%A Salutari, Francesco
%A Spadaro, Maria Chiara
%A Ivanov, Yurii P.
%A Divitini, Giorgio
%A Gogos, Alexander
%A Herrmann, Inge K.
%A Arbiol, Jordi
%A Smet, Philippe F.
%A De Roo, Jonathan
%T Epitaxial Core/Shell Nanocrystals of (Europium-Doped) Zirconia and Hafnia
%J Journal of the American Chemical Society
%V 146
%N 30
%@ 0002-7863
%C Washington, DC
%I ACS Publications
%M PUBDB-2025-00163
%P 20550-20555
%D 2024
%X 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. 
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:39038812
%U <Go to ISI:>//WOS:001275521800001
%R 10.1021/jacs.4c05037
%U https://bib-pubdb1.desy.de/record/622051