Harnessing self-sensitized scintillation by supramolecular engineering of CsPbBr3 nanocrystals in dense mesoporous template nanospheres
Harnessing self-sensitized scintillation by supramolecular engineering of CsPbBr3 nanocrystals in dense mesoporous template nanospheres
Perovskite-based nanoscintillators, such as CsPbBr3 nanocrystals (NCs), are emerging as promising candidates for ionizing radiation detection, thanks to their high emission efficiency, rapid response, and facile synthesis. However, their nanoscale dimensions - smaller than the mean free path of secondary carriers - and relatively low emitter density per unit volume, limited by their high molecular weight and reabsorption losses, restrict efficient secondary carrier conversion and hamper their practical deployment. In this work, we introduce a strategy to enhance scintillation performance by organizing NCs into densely packed domains within porous SiO2 mesospheres (MSNs). This engineered architecture achieves up to a 40-fold increase in radioluminescence intensity compared to colloidal NCs, driven by improved retention and conversion of secondary charges, as corroborated by electron release measurements. This approach offers a promising pathway toward developing next-generation nanoscintillators with enhanced performance, with potential applications in high-energy physics, medical imaging, and space technologies.
Xiaohe Zhou、Matteo L. Zaffalon、Emanuele Mazzola、Andrea Fratelli、Francesco Carulli、Chenger Wang、Mengda He、Francesco Bruni、Saptarshi Chakraborty、Leonardo Poletti、Francesca Rossi、Luca Gironi、Francesco Meinardi、Liang Li、Sergio Brovelli
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyDipartimento di Fisica, Università degli Studi di Milano-Bicocca, Milan, ItalyDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalySchool of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, ChinaDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyIMEM-CNR, Parma, ItalyIMEM-CNR, Parma, ItalyDipartimento di Fisica, Università degli Studi di Milano-Bicocca, Milan, ItalyDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, ItalyMacao Institute of Materials Science and EngineeringDipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, Milano, Italy
粒子探测技术、辐射探测技术、核仪器仪表
Xiaohe Zhou,Matteo L. Zaffalon,Emanuele Mazzola,Andrea Fratelli,Francesco Carulli,Chenger Wang,Mengda He,Francesco Bruni,Saptarshi Chakraborty,Leonardo Poletti,Francesca Rossi,Luca Gironi,Francesco Meinardi,Liang Li,Sergio Brovelli.Harnessing self-sensitized scintillation by supramolecular engineering of CsPbBr3 nanocrystals in dense mesoporous template nanospheres[EB/OL].(2025-05-14)[2025-07-21].https://arxiv.org/abs/2505.09210.点此复制
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