The Bright X‐Ray Stimulated Luminescence of HfO 2 Nanocrystals Activated by Ti Ions
| العنوان: | The Bright X‐Ray Stimulated Luminescence of HfO 2 Nanocrystals Activated by Ti Ions |
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| المؤلفون: | Bodo Hattendorf, Christophe Dujardin, Mauro Fasoli, F. Moretti, I Villa, Antonella Rossi, Alessandro Lauria, Markus Niederberger, Anna Vedda |
| المساهمون: | Dipartimento di Scienza dei Materiali = Department of Materials Science [Milano-Bicocca], Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Universita degli Studi di Cagliari [Cagliari], Department of Materials [ETH Zürich] (D-MATL), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Laboratory of Inorganic Chemistry [ETH Zürich] (LAC), Department of Chemistry and Applied Biosciences [ETH Zürich] (D-CHAB), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Villa, I, Moretti, F, Fasoli, M, Rossi, A, Hattendorf, B, Dujardin, C, Niederberger, M, Vedda, A, Lauria, A |
| المصدر: | Advanced Optical Materials Advanced Optical Materials, Wiley, 2019, pp.1901348. ⟨10.1002/adom.201901348⟩ |
| بيانات النشر: | HAL CCSD, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, Radioluminescence efficiency, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, Photochemistry, 01 natural sciences, Ion, [SPI]Engineering Sciences [physics], [CHIM]Chemical Sciences, Scintillation, Decay time, Titanium, [PHYS]Physics [physics], X-ray, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Hafnium oxide nanoparticles, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, FIS/01 - FISICA SPERIMENTALE, Nanocrystal, chemistry, 0210 nano-technology, Luminescence, hafnium oxide nanoparticle |
| الوصف: | International audience; The recent trends in scintillator technologies stimulate research efforts toward the development of novel materials morphologies, such as nanoparticles, able to efficiently convert ionizing radiations into light. For example, scintillating nanoparticles attract great interest in medical oncological therapies. In this work, the structural and morphological properties of HfO2:Ti nanoparticles with Ti concentrations from 0.03 to 10 mol% and subjected to calcination up to 1000 °C are thoroughly characterized; moreover, X‐ray photoelectron spectroscopy reveals the incorporation of Ti in both Ti (III) and Ti (IV) chemical states in as prepared samples, while the exclusive presence of Ti(IV) is unambiguously identified in calcined nanoparticles. The optical emission under X‐ray excitation evidences an intense Ti (IV)‐related luminescence at 2.5 eV in high temperature calcined samples with a few microseconds scintillation lifetime, and efficiency comparable to that of Bi4Ge3O12 reference scintillator. Finally, the competitive role of defects in charge carriers capture is demonstrated by the monotonic increase of the 2.5 eV band during prolonged X‐ray irradiation, more evident for nanoparticles with titanium concentration below 1 mol%. HfO2:Ti may also find application in X‐ray triggered oncological therapies by using the Ti (IV)‐related bright radioluminescence to excite photosensitizer molecules for singlet oxygen generation. |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| تدمد: | 2195-1071 |
| DOI: | 10.1002/adom.201901348⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d72da9b569c8105c3d8cfd35626a6edb https://hal.archives-ouvertes.fr/hal-02389154 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....d72da9b569c8105c3d8cfd35626a6edb |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 21951071 |
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| DOI: | 10.1002/adom.201901348⟩ |