Composite fast scintillators based on high-Z fluorescent metal–organic framework nanocrystals
| Autor: | J Perego, Alessandro Pedrini, L. Gironi, Angelo Monguzzi, E. C. Padovani, Christophe Dujardin, Anna Vedda, Silvia Bracco, Etiennette Auffray, I Villa, Angiolina Comotti, Francesco Meinardi, M Beretta, Piero Sozzani, Matteo Salomoni, R Crapanzano, Charl X. Bezuidenhout, Stefan Gundacker, Nicolaus Kratochwil |
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| Přispěvatelé: | Dipartimento di Scienza dei Materiali = Department of Materials Science [Milano-Bicocca], Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Luminescence (LUMINESCENCE), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], European Organization for Nuclear Research (CERN), University of Vienna [Vienna], Perego, J, Villa, I, Pedrini, A, Padovani, E, Crapanzano, R, Vedda, A, Dujardin, C, Bezuidenhout, C, Bracco, S, Sozzani, P, Comotti, A, Gironi, L, Beretta, M, Salomoni, M, Kratochwil, N, Gundacker, S, Auffray, E, Meinardi, F, Monguzzi, A |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Physics::Instrumentation and Detectors sicintillator fast emitter Nanoparticle Physics::Optics 02 engineering and technology Scintillator 01 natural sciences Particle detector 010309 optics [SPI]Engineering Sciences [physics] met-organic framework 0103 physical sciences X-rays [CHIM]Chemical Sciences MOF chemistry.chemical_classification [PHYS]Physics [physics] Scintillation Nanoscale materials business.industry Photonic devices Polymer composite material 021001 nanoscience & nanotechnology Fluorescence Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry Optics and photonics nnocrystal Picosecond Optoelectronics Nanoparticles 0210 nano-technology business Ultrashort pulse |
| Zdroj: | Nature Photonics Nature Photonics, Nature Publishing Group, 2021, ⟨10.1038/s41566-021-00769-z⟩ |
| ISSN: | 1749-4885 1749-4893 |
| Popis: | Scintillators, materials that produce light pulses upon interaction with ionizing radiation, are widely employed in radiation detectors. In advanced medical-imaging technologies, fast scintillators enabling a time resolution of tens of picoseconds are required to achieve high-resolution imaging at the millimetre length scale. Here we demonstrate that composite materials based on fluorescent metal–organic framework (MOF) nanocrystals can work as fast scintillators. We present a prototype scintillator fabricated by embedding MOF nanocrystals in a polymer. The MOF comprises zirconium oxo-hydroxy clusters, high-Z linking nodes interacting with the ionizing radiation, arranged in an orderly fashion at a nanometric distance from 9,10-diphenylanthracene ligand emitters. Their incorporation in the framework enables fast sensitization of the ligand fluorescence, thus avoiding issues typically arising from the intimate mixing of complementary elements. This proof-of-concept prototype device shows an ultrafast scintillation rise time of ~50 ps, thus supporting the development of new scintillators based on engineered fluorescent MOF nanocrystals. Composites of fluorescent metal–organic framework nanocrystals in a polymer are exploited to create fast scintillators with a rise time of about 50 ps. |
| Databáze: | OpenAIRE |
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