热塑性有机金属卤化物闪烁体,ACS Materials Letters

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热塑性有机金属卤化物闪烁体
ACS Materials Letters ( IF 9.6 ) Pub Date : 2023-08-14 , DOI: 10.1021/acsmaterialslett.3c00697
Hao Li _{1,

2} , Zhaowei Teng ₃ , Min Zhou ₄ , Tao Ji ₂ , Yang Yue ₁ , Hui Ying Yang ₅ , Jianbei Qiu ₂ , Qingyuan Wang ₁ , Xuhui Xu ₂ , Xue Yu ₁

Affiliation

X 射线成像的发展具有广泛的工业应用，从医疗诊断、安全、工业检查一直到太空探索。因此，对闪烁体广泛研究的热情一直在稳步增长。然而，通过可行的加工获得具有优越性能的闪烁体，并最大限度地减少闪烁体屏幕和成像物体之间X射线传播的散射，特别是对于具有高度弯曲表面的目标，仍然是挑战。这里，有机金属卤化物闪烁体 [Bmmim] ₂ SbCl ₅（Bmmim = 1-丁基-2,3-甲基咪唑鎓）的开发，在 363 K 下展现出令人着迷的热塑性特性。它允许将所探索的闪烁体用作粘合涂料，解决 X 射线成像的光散射问题从根本上来说。流变特性被证明得益于[SbCl ₅ ] ^2-和通过氢键直接连接的有机基团的结构特征。此外，相应闪烁体的卓越加工性能进一步证实了其在靶材上涂漆/刮擦的回收能力。值得注意的是，X 射线成像具有高分辨率 (∼12.5 lp mm ^–1) 是可以不断实现的。在这里，这些结果不仅弄清楚了弯曲或不规则形状物体的X射线成像的光散射，而且为开发具有可行加工性能的低成本X射线探测器和成像仪开辟了新途径。

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A Thermoplastic Organic Metal Halide Scintillator

X-ray imaging has been developed with widespread industrial applications, from medical diagnostics, security, and industrial inspection all the way to space exploration. Accordingly, enthusiasm for extensive research on scintillators has been steadily growing. However, obtaining scintillators with superior performance via feasible processing and minimizing the scattering of X-ray propagation between the scintillator screen and the imaging object, especially for targets with highly curved surfaces, are still challenges. Here, an organic metal halide scintillator [Bmmim]₂SbCl₅ (Bmmim = 1-butyl-2,3-methylimidazolium) is developed, which reveals a fascinating thermoplastic characteristic at 363 K. It allows the as-explored scintillator to be used as an adhesive paint, addressing the light scattering of X-ray imaging fundamentally. The rheological property is demonstrated to profit from the structural characteristic of [SbCl₅]^2– and organic groups directly connected by hydrogen bonds. Moreover, the exceptional processability of the corresponding scintillator further confirms its recycling capability in painting/scraping onto/from the targets. Notably, X-ray imaging with a high resolution (∼12.5 lp mm^–1) is constantly achievable. Herein, these results not only figure out the light scattering of X-ray imaging for curved or irregularly shaped objects but also open a new avenue to the development of low-cost X-ray detectors and imagers with feasible processability.

更新日期：2023-08-14

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