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学者姓名：陈秋水
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Abstract ：
Flexible scintillator screens characterized by high spatial resolution, low cost, and a simple fabrication process are in significant demand for applications in medical diagnosis and industrial detection. Here, we have demonstrated a new Mn2+-doped two-dimensional (2D) Ruddlesden-Popper type perovskite, (4-tert-butylbenzylamine)(2)PbBr4:Mn, serving as a highly efficient scintillator candidate. Doping with Mn2+ induces a spin-forbidden internal transition (T-4(1g) -> (6)A(1g)) that enhances the energy-transfer efficiency from the strongly bound excitons of the host material to the d electrons of the Mn2+ ions, ultimately leading to intense orange-red emission. This process enhances the photoluminescence quantum yield of (4-tert-butylbenzylamine)(2)PbBr4 (1) and decreases its self-absorption. Therefore, at the optimal Mn2+-doping concentration, 1:8.4%Mn2+ demonstrates a high light yield of 21,532 Ph/MeV and a low detection limit of 198.19 nGy(air) s(-1), exceeding the performance of a commercial bismuth germanium oxide (BGO) scintillator. Furthermore, we combined ultrafine powders of 1:8.4%Mn2+ with poly(dimethylsiloxane) to fabricate flexible scintillator films. With the optimal film thickness and mass percentage of 1:8.4%Mn2+, the scintillator films achieve their maximum spatial resolution of 17.3 lp mm(-1). The above results indicate that the exceptional flexible scintillation imaging performance of 1:8.4%Mn2+ effectively addresses the shortcomings of current commercial scintillators, thereby providing a new option for the scintillator family.
Keyword ：
2D perovskite 2D perovskite flexible scintillator screen flexible scintillator screen imaging imaging Mn2+ doping Mn2+ doping scintillator scintillator
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| GB/T 7714 | Rong, Hao , Xu, Xinqi , Yao, Jia-Yu et al. High-Resolution Flexible X-ray Imaging in a Two-Dimensional Mn2+-Doped Perovskite Scintillator [J]. | ACS APPLIED MATERIALS & INTERFACES , 2025 . |
| MLA | Rong, Hao et al. "High-Resolution Flexible X-ray Imaging in a Two-Dimensional Mn2+-Doped Perovskite Scintillator" . | ACS APPLIED MATERIALS & INTERFACES (2025) . |
| APA | Rong, Hao , Xu, Xinqi , Yao, Jia-Yu , Fan, Qingshun , Zhang, Haoyu , Xu, Haojie et al. High-Resolution Flexible X-ray Imaging in a Two-Dimensional Mn2+-Doped Perovskite Scintillator . | ACS APPLIED MATERIALS & INTERFACES , 2025 . |
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Abstract ：
The development of high-performance metal-free organic X-ray scintillators (OXSTs), characterized by a synergistic combination of robust X-ray absorption, efficient exciton utilization, and short luminescence lifetimes, poses a considerable challenge. Here we present an effective strategy for achieving augmented X-ray scintillation through the utilization of halogenated open-shell organic radical scintillators. Our experimental results demonstrate that the synthesized scintillators exhibit strong X-ray absorption derived from halogen atoms, display efficacious X-ray stability, and theoretically achieve 100% exciton utilization efficiency with a short lifetime (∼18 ns) due to spin-allowed doublet transitions. The superior X-ray scintillation performance exhibited by these organic radicals is not only exploitable in X-ray radiography for contrast imaging of various objects but also applicable in a medical high-resolution micro-computer-tomography system for the clear visualization of fibrous veins within a bamboo stick. Our study substantiates the promise of organic radicals as prospective candidates for OXSTs, offering valuable insights and a roadmap for the development of advanced organic radical scintillators geared towards achieving high-quality X-ray radiography. © The Author(s) 2024.
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| GB/T 7714 | Luo, A. , Zhang, J. , Xiao, D. et al. Efficient metal free organic radical scintillators [J]. | Nature Communications , 2024 , 15 (1) . |
| MLA | Luo, A. et al. "Efficient metal free organic radical scintillators" . | Nature Communications 15 . 1 (2024) . |
| APA | Luo, A. , Zhang, J. , Xiao, D. , Xie, G. , Xu, X. , Zhao, Q. et al. Efficient metal free organic radical scintillators . | Nature Communications , 2024 , 15 (1) . |
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Abstract ：
The growing demands for X-ray imaging applications impose diverse and stringent requirements on advanced X-ray detectors. Among these, flexibility stands out as the most expected characteristic for next-generation X-ray detectors. Flexible X-ray detectors can spatially conform to nonflat surfaces, substantially improving the imaging resolution, reducing the X-ray exposure dosage, and enabling extended application opportunities that are hardly achievable by conventional rigid flat-panel detectors. Over the past years, indirect- and direct-conversion flexible X-ray detectors have made marvelous achievements. In particular, microscale and nanoscale engineering technologies play a pivotal role in defining the optical, electrical, and mechanical properties of flexible X-ray detectors. In this Perspective, we spotlight recent landmark advancements in flexible X-ray detectors from the aspects of micro/nano engineering strategies, which are broadly categorized into two prevailing modalities: materials-in-substrate and materials-on-substrate. We also discuss existing challenges hindering the development of flexible X-ray detectors, as well as prospective research opportunities to mitigate these issues. © 2024 American Chemical Society.
Keyword ：
Carrier concentration Carrier concentration II-VI semiconductors II-VI semiconductors Particle detectors Particle detectors Photons Photons Scintillation counters Scintillation counters Semiconductor detectors Semiconductor detectors X ray analysis X ray analysis X ray cameras X ray cameras X ray detectors X ray detectors X ray laboratories X ray laboratories
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| GB/T 7714 | Ou, Xiangyu , Hong, Zhongzhu , Wu, Qinxia et al. Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors [J]. | ACS Nano , 2024 , 18 (40) : 27126-27137 . |
| MLA | Ou, Xiangyu et al. "Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors" . | ACS Nano 18 . 40 (2024) : 27126-27137 . |
| APA | Ou, Xiangyu , Hong, Zhongzhu , Wu, Qinxia , Chen, Xiaofeng , Xie, Lili , Zhang, Zhenzhen et al. Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors . | ACS Nano , 2024 , 18 (40) , 27126-27137 . |
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Abstract ：
X射线发光是指闪烁体在X射线激发下发射出低能量光子的过程，在生物传感、医学成像、光动力治疗、光遗传等领域具有应用前景。相较于传统的紫外激发光，X射线对生物组织具有高穿透性且不会触发生物体的自荧光，可实现深组织、无背景、高灵敏的生物分析。近年来，基于纳米闪烁体的X射线发光在生物光子学领域中得到广泛研究，促进了X射线发光在分析化学和生物医学中的应用。本文首先对闪烁体的X射线发光机理进行了概述，接着重点介绍了纳米闪烁体作为光学探针在生物分子测量与疾病治疗中的研究进展，包括生物传感、活体成像和光动力治疗等，最后讨论了该领域存在的一些挑战和可能的解决方案。
Keyword ：
X射线发光 X射线发光 光学探针 光学探针 生物分析 生物分析 纳米闪烁体 纳米闪烁体
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| GB/T 7714 | 徐新奇 , 张珍珍 , 陈小丰 et al. 基于纳米闪烁体的X射线发光生物分子测量与疾病治疗研究进展 [J]. | 化学通报 , 2024 , 87 (09) : 1009-1019 . |
| MLA | 徐新奇 et al. "基于纳米闪烁体的X射线发光生物分子测量与疾病治疗研究进展" . | 化学通报 87 . 09 (2024) : 1009-1019 . |
| APA | 徐新奇 , 张珍珍 , 陈小丰 , 陈秋水 , 杨黄浩 . 基于纳米闪烁体的X射线发光生物分子测量与疾病治疗研究进展 . | 化学通报 , 2024 , 87 (09) , 1009-1019 . |
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Abstract ：
The development of high-performance metal-free organic X-ray scintillators (OXSTs), characterized by a synergistic combination of robust X-ray absorption, efficient exciton utilization, and short luminescence lifetimes, poses a considerable challenge. Here we present an effective strategy for achieving augmented X-ray scintillation through the utilization of halogenated open-shell organic radical scintillators. Our experimental results demonstrate that the synthesized scintillators exhibit strong X-ray absorption derived from halogen atoms, display efficacious X-ray stability, and theoretically achieve 100% exciton utilization efficiency with a short lifetime (similar to 18 ns) due to spin-allowed doublet transitions. The superior X-ray scintillation performance exhibited by these organic radicals is not only exploitable in X-ray radiography for contrast imaging of various objects but also applicable in a medical high-resolution micro-computer-tomography system for the clear visualization of fibrous veins within a bamboo stick. Our study substantiates the promise of organic radicals as prospective candidates for OXSTs, offering valuable insights and a roadmap for the development of advanced organic radical scintillators geared towards achieving high-quality X-ray radiography. The development of metal-free organic X-ray scintillators combining X-ray absorption, efficient exciton utilization, and short luminescence lifetimes, remains challenging. Here, the authors present a strategy for achieving augmented X-ray scintillation through the utilization of halogenated open-shell organic radical scintillators.
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| GB/T 7714 | Luo, Ansheng , Zhang, Jingru , Xiao, Dongjie et al. Efficient metal free organic radical scintillators [J]. | NATURE COMMUNICATIONS , 2024 , 15 (1) . |
| MLA | Luo, Ansheng et al. "Efficient metal free organic radical scintillators" . | NATURE COMMUNICATIONS 15 . 1 (2024) . |
| APA | Luo, Ansheng , Zhang, Jingru , Xiao, Dongjie , Xie, Gaozhan , Xu, Xinqi , Zhao, Qingxian et al. Efficient metal free organic radical scintillators . | NATURE COMMUNICATIONS , 2024 , 15 (1) . |
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Abstract ：
The growing demands for X-ray imaging applications impose diverse and stringent requirements on advanced X-ray detectors. Among these, flexibility stands out as the most expected characteristic for next-generation X-ray detectors. Flexible X-ray detectors can spatially conform to nonflat surfaces, substantially improving the imaging resolution, reducing the X-ray exposure dosage, and enabling extended application opportunities that are hardly achievable by conventional rigid flat-panel detectors. Over the past years, indirect- and direct-conversion flexible X-ray detectors have made marvelous achievements. In particular, microscale and nanoscale engineering technologies play a pivotal role in defining the optical, electrical, and mechanical properties of flexible X-ray detectors. In this Perspective, we spotlight recent landmark advancements in flexible X-ray detectors from the aspects of micro/nano engineering strategies, which are broadly categorized into two prevailing modalities: materials-in-substrate and materials-on-substrate. We also discuss existing challenges hindering the development of flexible X-ray detectors, as well as prospective research opportunities to mitigate these issues.
Keyword ：
flexible X-ray detectors flexible X-ray detectors nanoengineering nanoengineering scintillator scintillator semiconductor semiconductor X-ray imaging X-ray imaging
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| GB/T 7714 | Ou, Xiangyu , Hong, Zhongzhu , Wu, Qinxia et al. Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors [J]. | ACS NANO , 2024 , 18 (40) : 27126-27137 . |
| MLA | Ou, Xiangyu et al. "Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors" . | ACS NANO 18 . 40 (2024) : 27126-27137 . |
| APA | Ou, Xiangyu , Hong, Zhongzhu , Wu, Qinxia , Chen, Xiaofeng , Xie, Lili , Zhang, Zhenzhen et al. Micro/Nano Engineering Advances Next-Generation Flexible X-ray Detectors . | ACS NANO , 2024 , 18 (40) , 27126-27137 . |
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Abstract ：
Efficient and stable scintillators play a crucial role in X-ray detection applications. To enhance the luminescence efficiency under X-ray excitation, the incorporation of multiple emission centers into scintillators is widely explored. Here, it is found that the cesium copper halide Cs5Cu3Cl6I2 exhibits dual emission centers, enabling high-performance scintillators with an X-ray light yield of 49000 photon MeV-1 and a low detection limit of 4 nGy s(-1). The emissions of Cs5Cu3Cl6I2 are from intrinsic self-trapped exciton (STE) and Frenkel defect-assisted STE. High-energy X-rays can induce an increased fraction of Frenkel defect-assisted STEs, which can serve as an effective scintillation channel. Furthermore, large-area flexible scintillators with a high resolution of 18 lp mm(-1) are developed, making them suitable for X-ray imaging applications. These findings offer promising insights for developing more efficient scintillators.
Keyword ：
defect defect dual emission dual emission lead-free metal halide lead-free metal halide self-trapped excitons self-trapped excitons X-ray scintillation X-ray scintillation
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| GB/T 7714 | Nan, Yang , Wang, Chengcheng , Zhang, Guangbin et al. Extrinsic Self-Trapped-Exciton Emission in Cs5Cu3Cl6I2 for Efficient X-Ray Scintillation [J]. | ADVANCED OPTICAL MATERIALS , 2024 , 12 (29) . |
| MLA | Nan, Yang et al. "Extrinsic Self-Trapped-Exciton Emission in Cs5Cu3Cl6I2 for Efficient X-Ray Scintillation" . | ADVANCED OPTICAL MATERIALS 12 . 29 (2024) . |
| APA | Nan, Yang , Wang, Chengcheng , Zhang, Guangbin , Kuang, Zhiyuan , Liu, Wenbo , Zhou, Mingmin et al. Extrinsic Self-Trapped-Exciton Emission in Cs5Cu3Cl6I2 for Efficient X-Ray Scintillation . | ADVANCED OPTICAL MATERIALS , 2024 , 12 (29) . |
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Long-lasting radioluminescence scintillators have recently attracted substantial attention from both research and industrial communities, primarily due to their distinctive capabilities of converting and storing X-ray energy. However, determination of energy-conversion kinetics in these nanocrystals remains unexplored. Here we present a strategy to probe and unveil energy-funneling kinetics in NaLuF4:Mn2+/Gd3+ nanocrystal sublattices through Gd3+-driven microenvironment engineering and Mn2+-mediated radioluminescence profiling. Our photophysical studies reveal effective control of energy-funneling kinetics and demonstrate the tunability of electron trap depth ranging from 0.66 to 0.96 eV, with the corresponding trap density varying between 2.38x105 and 1.34x107 cm-3. This enables controlled release of captured electrons over durations spanning from seconds to 30 days. It allows tailorable emission wavelength within the range of 520-580 nm and fine-tuning of thermally-stimulated temperature between 313-403 K. We further utilize these scintillators to fabricate high-density, large-area scintillation screens that exhibit a 6-fold improvement in X-ray sensitivity, 22 lp/mm high-resolution X-ray imaging, and a 30-day-long optical memory. This enables high-contrast imaging of injured mice through fast thermally-stimulated radioluminescence readout. These findings offer new insights into the correlation of radioluminescence dynamics with energy-funneling kinetics, thereby contributing to the advancement of high-energy nanophotonic applications. Energy-funneling kinetics in NaLuF4: Mn2+/Gd3+ nanocrystals were explored through precise microenvironment engineering within nanocrystal sublattices. The resulting tailorable radioluminescence afterglow enabled high-sensitivity, high-resolution X-ray imaging with an ultralong optical memory. image
Keyword ：
Electronic traps Electronic traps Energy funneling Energy funneling Nanocrystal scintillators Nanocrystal scintillators Radioluminescence afterglow Radioluminescence afterglow X-ray imaging X-ray imaging
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| GB/T 7714 | Wu, Qinxia , Xu, Xinqi , Li, Xiaokun et al. Probing Energy-Funneling Kinetics in Nanocrystal Sublattices for Superior X-Ray Imaging [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (25) . |
| MLA | Wu, Qinxia et al. "Probing Energy-Funneling Kinetics in Nanocrystal Sublattices for Superior X-Ray Imaging" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 63 . 25 (2024) . |
| APA | Wu, Qinxia , Xu, Xinqi , Li, Xiaokun , Jiang, Hao , Qin, Xian , Hong, Zhongzhu et al. Probing Energy-Funneling Kinetics in Nanocrystal Sublattices for Superior X-Ray Imaging . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (25) . |
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Abstract ：
X射线发光是指闪烁体在X射线激发下发射出低能量光子的过程,在生物传感、医学成像、光动力治疗、光遗传等领域具有应用前景.相较于传统的紫外激发光,X射线对生物组织具有高穿透性且不会触发生物体的自荧光,可实现深组织、无背景、高灵敏的生物分析.近年来,基于纳米闪烁体的X射线发光在生物光子学领域中得到广泛研究,促进了 X射线发光在分析化学和生物医学中的应用.本文首先对闪烁体的X射线发光机理进行了概述,接着重点介绍了纳米闪烁体作为光学探针在生物分子测量与疾病治疗中的研究进展,包括生物传感、活体成像和光动力治疗等,最后讨论了该领域存在的一些挑战和可能的解决方案.
Keyword ：
X射线发光 X射线发光 光学探针 光学探针 生物分析 生物分析 纳米闪烁体 纳米闪烁体
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| GB/T 7714 | 徐新奇 , 张珍珍 , 陈小丰 et al. 基于纳米闪烁体的X射线发光生物分子测量与疾病治疗研究进展 [J]. | 化学通报（印刷版） , 2024 , 87 (9) : 1009-1019 . |
| MLA | 徐新奇 et al. "基于纳米闪烁体的X射线发光生物分子测量与疾病治疗研究进展" . | 化学通报（印刷版） 87 . 9 (2024) : 1009-1019 . |
| APA | 徐新奇 , 张珍珍 , 陈小丰 , 陈秋水 , 杨黄浩 . 基于纳米闪烁体的X射线发光生物分子测量与疾病治疗研究进展 . | 化学通报（印刷版） , 2024 , 87 (9) , 1009-1019 . |
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Precise monitoring of biomolecular radiation damage is crucial for understanding X-ray-induced cell injury and improving the accuracy of clinical radiotherapy. We present the design and performance of lanthanide-DNA-origami nanodosimeters for directly visualizing radiation damage at the single-particle level. Lanthanide ions (Tb3+ or Eu3+) coordinated with DNA origami nanosensors enhance the sensitivity of X-ray irradiation. Atomic force microscopy (AFM) revealed morphological changes in Eu3+-sensitized DNA origami upon X-ray irradiation, indicating damage caused by ionization-generated electrons and free radicals. We further demonstrated the practical applicability of Eu3+-DNA-origami integrated chips in precisely monitoring radiation-mediated cancer radiotherapy. Quantitative results showed consistent trends with flow cytometry and histological examination under comparable X-ray irradiation doses, providing an affordable and user-friendly visualization tool for preclinical applications. These findings provide new insights into the impact of heavy metals on radiation-induced biomolecular damage and pave the way for future research in developing nanoscale radiation sensors for precise clinical radiography.
Keyword ：
DNA origami DNA origami Lanthanide sensitizer Lanthanide sensitizer Radiationdamage Radiationdamage Radiotherapy Radiotherapy X-ray sensitivity X-ray sensitivity
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| GB/T 7714 | Chen, Minle , Jiang, Yijuan , Zhang, Yongjie et al. Visualization of Biomolecular Radiation Damage at the Single-Particle Level Using Lanthanide-Sensitized DNA Origami [J]. | NANO LETTERS , 2024 , 24 (37) : 11690-11696 . |
| MLA | Chen, Minle et al. "Visualization of Biomolecular Radiation Damage at the Single-Particle Level Using Lanthanide-Sensitized DNA Origami" . | NANO LETTERS 24 . 37 (2024) : 11690-11696 . |
| APA | Chen, Minle , Jiang, Yijuan , Zhang, Yongjie , Chen, Xiaoling , Xie, Lei , Xie, Lili et al. Visualization of Biomolecular Radiation Damage at the Single-Particle Level Using Lanthanide-Sensitized DNA Origami . | NANO LETTERS , 2024 , 24 (37) , 11690-11696 . |
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