High-Brightness Colloidal Cu 4 I 4 -Based Microcrystal Scintillators for High-Resolution Rotational Dynamic X-ray Imaging and 3D Reconstruction

作者：Tiantian Sang, Jiacheng Shen, Kun Gang, Le Li, Mingli Liang, Xiaoyu Li, Lei Zhang, Jinbiao Pan, Shujuan Liu, Xiangmei Liu, Qiang Zhao · 发表于：ACS Materials Letters · 年份：2025 · DOI：10.1021/acsmaterialslett.5c00758 · 被引用次数：13 · 研究领域：Nanocluster Synthesis and Applications、Nanoplatforms for cancer theranostics、Lanthanide and Transition Metal Complexes

Copper(I) iodide cluster-derived complexes show great promise for static X-ray imaging but face key challenges in dynamic X-ray imaging, due to difficulties in fabricating scintillator films that combine high brightness, low light scattering, and mechanical flexibility. Herein, electron-rich ligands are introduced to regulate the excited-state behavior and minimize nonradiative transitions in Cu 4 I 4 cluster-derived complexes. Under poly(vinylpyrrolidone) (PVP) micelle confinement, colloidal Cu 4 I 4 cluster-derived microcrystals with a high photoluminescence quantum yield (PLQY) of 92.4% and a steady-state X-ray relative light yield four times than that of Bi 4 Ge 3 O 12 were synthesized. By synergistic integration of ligand regulation, PVP micelle confinement, and precise control of microelectronic printing, uniform scintillator films enabling high-resolution X-ray imaging (exceeding 20 lp mm –1 ) were achieved. These films exhibit outstanding performance in real-time dynamic X-ray imaging and 3D reconstruction of nonplanar objects, representing a significant advancement beyond conventional 2D X-ray imaging toward 3D panoramic and tomographic applications.