Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.657
Publication date: 16th December 2024
Fast and highly emissive plastic scintillators, usually made of a polymeric scintillating matrix that host a fluorescent dye, are requested for many advanced applications where high signal-to-noise ratio is required in a short time window. For example, to detect high rate events avoiding pile up in high energy physics experiments at the energy and intensity frontiers to face the challenges of unprecedented event rate and severe radiation environment, or to quickly acquire high quality image at low dose in medical applications as in the time-of-flight positron emission tomography (TOF-PET) imaging technique, where coincidence time resolution (CTR) of tents of picoseconds time is desired. Unfortunately, their low density results into a low stopping power of the high energy radiation and their scintillation light yield 𝜙𝐿𝑌, defined as the ratio between the number of emitted photons and the energy deposited in the system, is lower than the one of best inorganic scintillators. This detrimentally reduces the emitted light output and consequently the detector sensitivity.
A common strategy to improve the 𝜙𝐿𝑌 is the loading of polymeric scintillators with high Z elements or dense nanoparticles (NPs) to enhance the stopping power of liquid and polymeric conjugated scintillators [1-3]. Otherwise, to still keep the good emissive properties of conjugated systems, a possible solution is to use scintillating metal-Organic Framework (MOF) crystalline s hybrid system composed of conjugated ligands connected by heavy-element containing linking nodes [4-7].
I will present the most recent results on the development of these system highlighting the main peculiar photophysical of the scintillation process in these materials and the perspectives for their future uses.
[1] Villa et al. Nano Letters, 24 (27), 8248-8256 (2024)
[2] Orfano et al. Nature Photon. 17, 672–678 (2023)
[3] Orfano at al. Adv. Mater. Technol. 2024, 2302075
[4] Perego, Villa, et al. Nature Photonics 15, 393 (2021)
[5] Orfano, M., et al. Nature Photonics 17, 672–678 (2023)
[6] Perego, J., et al. Nature Communications 13, 3504 (2022)
[7] Orfano at al Adv. Funct. Mater. 2404480 (2024)
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