The underwater X-ray imaging technology development is significant to subaqueous target reconnaissance/detection/identification, subfluvial archaeology,submerged resource exploration, etc. As the core of X-ray imaging...The underwater X-ray imaging technology development is significant to subaqueous target reconnaissance/detection/identification, subfluvial archaeology,submerged resource exploration, etc. As the core of X-ray imaging detection, the scintillator has been plagued by inherent moisture absorption and decomposition, and strict requirements for seamless packaging and waterproofing.Here, we designed a manganese-doped two-dimensional(2D) perovskite scintillator modified by hydrophobic longchain organic amine through the combination of component and doping engineering. The modified perovskites show high water repellency that can be used as an underwater X-ray scintillator. X-ray images of aquatic organisms or other objects with a high spatial resolution of10 lp·mm^(-1) at a big view field(32 mm × 32 mm) were obtained by scintillation screen. This hydrophobic perovskite scintillator based on molecular design is of great promise in underwater X-ray nondestructive testing technology development.展开更多
Cu(I)halides have emerged as promising scintillator candidates for underwater x-ray imaging applications,owing to their exceptional stability in water environment and outstanding optical properties.However,the relianc...Cu(I)halides have emerged as promising scintillator candidates for underwater x-ray imaging applications,owing to their exceptional stability in water environment and outstanding optical properties.However,the reliance on toxic organic solvents and low production yield in conventional synthesis methods pose obstacles to practical application.In this work,an aqueous grinding method is presented for the efficient synthesis of Cu(I)-iodine cluster halides powder(C1_(2)H_(24)O_(6))_(2)X_(2)Cu_(m)I_(n)(XCuI,X represents different alkali metals or alkaline earth metals),which exhibits bright luminescence with a high photoluminescence quantum yield(PLQY).The proposed approach is characterized by its simplicity,cost-effectiveness,environmental friendliness and safety.Given its high PLQY of 95.86%and rich photophysical properties,the scintillation performance of NaCuI is systematically investigated.The NaCuI powder achieves a low detection limit of 54.8 nGyair s^(-1)and a high relative light yield of 61986 photons MeV^(-1).Building upon these foundations,we fabricated a large-area and highly flexible NaCuI scintillation screen,which achieves an outstanding spatial resolution of 10.84 lp mm^(-1).Furthermore,integration of the scintillator screen with a thin-film transistor backplane array enabled real-time digital imaging of various test objects.The resulting x-ray flat-panel detector demonstrated exceptional imaging performance,capturing well-defined contours of imaged subjects and remarkably detecting underwater objects with notch defects.This research provides a new strategy for the synthesis and application of highly efficient luminescent scintillators with lowcost,high yield,and environmental friendliness.展开更多
基金financially supported by the National Natural Science Foundation of China (NSFC)(Nos.22175007 and 21975007)the National Natural Science Foundation for Outstanding Youth Foundation+1 种基金the Fundamental Research Funds for the Central Universities (No.YWF-22-K-101)the National Program for Support of Top-notch Young Professionals and the 111project (Nos.B14009)。
文摘The underwater X-ray imaging technology development is significant to subaqueous target reconnaissance/detection/identification, subfluvial archaeology,submerged resource exploration, etc. As the core of X-ray imaging detection, the scintillator has been plagued by inherent moisture absorption and decomposition, and strict requirements for seamless packaging and waterproofing.Here, we designed a manganese-doped two-dimensional(2D) perovskite scintillator modified by hydrophobic longchain organic amine through the combination of component and doping engineering. The modified perovskites show high water repellency that can be used as an underwater X-ray scintillator. X-ray images of aquatic organisms or other objects with a high spatial resolution of10 lp·mm^(-1) at a big view field(32 mm × 32 mm) were obtained by scintillation screen. This hydrophobic perovskite scintillator based on molecular design is of great promise in underwater X-ray nondestructive testing technology development.
基金National Natural Science Foundation of China,Grant/Award Numbers:62461160330,62304021,62404018Hebei Natural Science Foundation,Grant/Award Number:F2024105006+1 种基金China Postdoctoral Science Foundation,Grant/Award Numbers:2024T171120,2023M740232Postdoctoral Fellowship Program of CPSF,Grant/Award Number:GZB20230932。
文摘Cu(I)halides have emerged as promising scintillator candidates for underwater x-ray imaging applications,owing to their exceptional stability in water environment and outstanding optical properties.However,the reliance on toxic organic solvents and low production yield in conventional synthesis methods pose obstacles to practical application.In this work,an aqueous grinding method is presented for the efficient synthesis of Cu(I)-iodine cluster halides powder(C1_(2)H_(24)O_(6))_(2)X_(2)Cu_(m)I_(n)(XCuI,X represents different alkali metals or alkaline earth metals),which exhibits bright luminescence with a high photoluminescence quantum yield(PLQY).The proposed approach is characterized by its simplicity,cost-effectiveness,environmental friendliness and safety.Given its high PLQY of 95.86%and rich photophysical properties,the scintillation performance of NaCuI is systematically investigated.The NaCuI powder achieves a low detection limit of 54.8 nGyair s^(-1)and a high relative light yield of 61986 photons MeV^(-1).Building upon these foundations,we fabricated a large-area and highly flexible NaCuI scintillation screen,which achieves an outstanding spatial resolution of 10.84 lp mm^(-1).Furthermore,integration of the scintillator screen with a thin-film transistor backplane array enabled real-time digital imaging of various test objects.The resulting x-ray flat-panel detector demonstrated exceptional imaging performance,capturing well-defined contours of imaged subjects and remarkably detecting underwater objects with notch defects.This research provides a new strategy for the synthesis and application of highly efficient luminescent scintillators with lowcost,high yield,and environmental friendliness.
