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

Autor: Seno C; Department of Chemistry, University of Basel, Mattenstrasse 24a, 4058 Basel, Switzerland., Reichholf N; Department of Chemistry, University of Basel, Mattenstrasse 24a, 4058 Basel, Switzerland., Salutari F; Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, 08193 Barcelona, Catalonia, Spain., Spadaro MC; Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, 08193 Barcelona, Catalonia, Spain.; Department of Physics and Astronomy 'Ettore Majorana', University of Catania and CNR-IMM, Via S. Sofia 64, 95123 Catania, Italy., Ivanov YP; Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy., Divitini G; Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy., Gogos A; Laboratory for Particles-Biology Interactions, Department of Materials Meet Life, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.; Nanoparticle Systems Engineering Laboratory, Institute of Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland., Herrmann IK; Laboratory for Particles-Biology Interactions, Department of Materials Meet Life, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.; Nanoparticle Systems Engineering Laboratory, Institute of Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland., Arbiol J; Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, 08193 Barcelona, Catalonia, Spain.; ICREA, 08010 Barcelona, Catalonia, Spain., Smet PF; LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, 9000 Ghent, Belgium., De Roo J; Department of Chemistry, University of Basel, Mattenstrasse 24a, 4058 Basel, Switzerland.
Jazyk: angličtina
Zdroj: Journal of the American Chemical Society [J Am Chem Soc] 2024 Jul 31; Vol. 146 (30), pp. 20550-20555. Date of Electronic Publication: 2024 Jul 22.
DOI: 10.1021/jacs.4c05037
Abstrakt: 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 NaYF 4 systems.
Databáze: MEDLINE