Moth-Eye-Engineered Flexible Films for X-Ray Shielding and Persistent Radiation Warning

Developing flexible radiation detectors that maintain high performance under harsh environmental conditions remains a significant materials challenge. Conventional flexible scintillators often sacrifice either performance or stability. This study designed bioinspired SrAl2O4:Eu2+, Dy3+@SiO2 composites, where strong Al-O-Si covalent bonds created a unique moth-eye morphology. Films produced through a scalable electrospinning process demonstrate excellent resistance to water, acids, and alkalis, ensuring stable performance in harsh environments. Comprehensive testing confirms high X-ray shielding efficiency, ultrasensitive detection of low-dose-rate X-rays, high-resolution X-ray imaging, and prolonged radiation-induced visual warning.