闪烁体
材料科学
荧光
纳米晶
光电子学
纳米技术
光学
探测器
物理
作者
Jacopo Perego,Irène Villa,Alessandro Pedrini,E. C. Padovani,Roberta Crapanzano,A. Vedda,Christophe Dujardin,Charl X. Bezuidenhout,Silvia Bracco,Piero Sozzani,Angiolina Comotti,L. Gironi,M. Beretta,Naylya Sagidova,N. Kratochwil,S. Gundacker,Etiennette Auffray,Francesco Meinardi,Angelo Monguzzi
出处
期刊:Nature Photonics
[Springer Nature]
日期:2021-03-04
卷期号:15 (5): 393-400
被引量:110
标识
DOI:10.1038/s41566-021-00769-z
摘要
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.
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