CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zi-Hao Chen,Qiang Tang,Jian-An Zeng,Haijiao Xie,Rui Zou,Jing Wang,Bo-Mei Liu
X-rays hold broad application prospects across diverse domains. However, improper utilization poses a security risk to human safety. Recently, radiochromic materials have emerged as promising candidates for the detection and imaging of X-ray radiation. Herein, a novel material, La 2 MgZrO 6 :Pr 3+ , was developed that exhibits reversible photochromic induced by X-ray irradiation. When the material is irradiated with an X-ray, the color of the material changes from white to brown ( ΔR ≈ 32 %), and this color can be rapidly reversed when illuminated with a 450 nm blue lamp. Meantime, the radiation dose (0–120 Gy) can be initially determined according to the color depth of the material, and the dose can be accurately measured by thermoluminescence. Furthermore, a lab-made X-ray imaging system is designed, which can be used for both bright field and dark field dual-mode X-ray imaging with considerable resolution (∼4.5 lp mm −1 ). These findings could revolutionize the next generation of X-ray detection materials and devices, and drive progress in this field.
研究领域:
材料科学
·
医学影像
·
辐射检测
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Jingfei Ni,Qian Cao,Kang Xiao,Kun Gang,Shujuan Liu,Xiangmei Liu,Qiang Zhao
Copper(I) halide cluster-based coordination compounds have attracted significant attention in the development of novel scintillators due to their mild synthesis methods, high luminescence efficiency, tunable emission wavelength, high-Z element incorporation, and large structural diversity. However, a major obstacle for these crystalline materials with covalent/coordination network structures is their insolubility, which poses significant challenges for the low-cost and large-scale production of scintillation films. In this study, copper(I) iodide and benzotriazole derivative ligands with diverse cationic substituents are employed to fabricate all-in-one (AIO) colloidal copper(I) iodide cluster-based scintillator suspensions. These suspensions, characterized by distinctive ionic and coordination bonds, are synthesized via confined growth in the presence of polyvinylpyrrolidone (PVP). Furthermore, they demonstrate exceptional compatibility with polymer matrices, facilitating the production of uniform and flexible scintillation films with highly efficient radioluminescence through blade coating. The resulting films achieved an excellent spatial resolution of 17 lp mm −1 . This surfactant-assisted fabrication method for colloidal scintillators, combined with microelectronic printing for film preparation, demonstrates significant potential for developing flexible scintillation films for high-resolution X-ray imaging.
研究领域:
材料科学
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医学影像
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wanting Gui,Lu Yao,Xunsheng Zhou,Cai Lin Wang
X-ray scintillators play a crucial role in medical imaging, security applications, and non-destructive testing. However, most scintillators currently struggle to simultaneously fulfill the criteria of environmental sustainability, cost-effectiveness, high light yield, rapid decay times, excellent stability, and suitability for large-area devices. In this paper, we present a perovskite scintillator that encompasses all of these desired features by a defect modulation strategy. Different concentrations of Li + have been doped into the Rb 2 AgCl 3 by the anti-solvent method. The photoluminescence and radioluminescence intensity have been significantly increased. At the optimal doping concentration, the fluorescence quantum yield of the sample was as high as 88.7 %, the photoluminescence decay time was only 4.60 ns, which is faster than that of most scintillators; The experiments show that the introduction of Li + reduces the defects in the matrix and enhances emission intensity and decay rate. A large-area plastic composite scintillator film with Li + doped Rb 2 AgCl 3 scintillator achieved a spatial resolution of 12 lp/mm for X-ray imaging. Our study shows that defect engineering can effectively improve the performance of inorganic halide perovskite scintillator materials.
研究领域:
材料科学
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医学影像
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 22
·2400480
·
IF 8
Ting Han,Zhiyu Xue,Haiqing Qin,Aimiao Qin,Yong Xiang,Xinyu Wang,Xiaoran Hu,Jue Gong,Zhenlin Li
In the pursuit of low-dose flat-panel X-ray detection and imaging, controlling dark current is pivotal. Modulating the bandgap and resistivity of photosensitive materials is one of the methods to reduce dark current. The study introduces a novel approach by first demonstrating a non-perovskite orthorhombic phase δ-CsPbI 2 Br thick film, fabricated using an innovative elastic molecular-assisted coating strategy. This technique results in a material with an optimized bandgap of 2.30 eV and a significantly elevated resistivity of 2.42 × 10¹⁰ Ω cm. Consequently, this leads to an ultralow dark current of 1.34 nA cm⁻ 2 . Leveraging this advancement, the developed X-ray detectors showcase a groundbreaking low detection limit of 53 nGy air s⁻¹, surpassing the performance of their cubic-phase counterparts. Remarkably, the material exhibits excellent phase stability, maintaining its properties for up to 80 days. By integrating with a thin-film transistor array, a flat-panel X-ray detector that delivers high-quality 8-bit imaging across a 64 × 64 matrix is successfully engineered. This work not only presents a transformative approach to substantially reduce dark current in low-dose X-ray detection but also sets a new benchmark in the field by combining enhanced imaging capability with robust long-term stability.
研究领域:
材料科学
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医学影像
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Run Gan,Yanqing Zu,Tong Zhang,Chengzhang Yang,Chujie Wang,Binglin Zeng,Peitao Liu,Xiaodong Li,Fengbo Han,Yu Qian,Lei Zhao,Ailing Feng,Zhaoxin Wu
The lead-free perovskite Cs 2 ZrCl 6 has recently attracted huge interest in X-ray imaging application. However, it generally exhibits unsatisfactory stability originating from the intrinsically ionic structure and low formation energy, which will hinder the future application. Herein, we design different anchoring groups (amino, sulfhydryl and thiocyanate) mediated nucleation and growth process for synthesis of Cs 2 ZrCl 6 crystals coated by SiO 2 nanospheres, achieving Cs 2 ZrCl 6 @SiO 2 -X (X = NH 2 , SH, SCN) composites, respectively. Among these three samples, Cs 2 ZrCl 6 @SiO 2 -SCN has an impressive photoluminescence quantum yield (PLQY) of 89 %. More importantly, it also manifests outstanding stability toward light illumination, heat and moisture. Such high PLQY and robust stability stem from the isolation effect due to tight anchoring, which separate perovskite crystals from each other and prevent particle aggregation. Finally, a large-area (113 cm 2 ) scintillation screen based on Cs 2 ZrCl 6 @SiO 2 -SCN@poly(dimethylsiloxane) (PDMS) and a commercial thin-film transistor (TFT) panel (16 cm × 13 cm, 125 μm pixel size) were used to fabricate an X-ray imaging detector, which showed a spatial resolution up to 4 lp mm −1 beyond the upper limit of TFT panel and high-quality imaging capability of static objects. It is believed that this scintillator screen has a potential application in next-generation indirect X-ray detection and imaging.
研究领域:
材料科学
·
医学影像学
✓ 已验证
产品关联
DOI
高影响因子
npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-10
·
IF 12.3
Li Ruizi,Zhu Weiguo,Wang Haoyang,Jiao Yitong,Gao Yuan,Gao Ruikun,Wang Riheng,Chao Hongxiao,Yu Aimin,Liu Xiaowang
The thickness of the scintillation films in indirect X−ray detectors can significantly influence their luminescence intensity. However, due to the scattering and attenuation of incoherent photons, thick scintillation films tend to reduce light yield. Herein, a highly transparent perovskite glass−ceramic scintillation film, in which the CsPbBr 3 nanocrystals are in-situ grown inside a transparent amorphous polymer structure, is designed to achieve ultrastable and efficient X-ray imaging. The crystal coordination−topology growth and in−situ film formation strategy is proposed to control the crystal growth and film thickness, which can prevent light scattering and non−uniform distribution of CsPbBr 3 nanocrystals while providing sufficient film thickness to absorb X−ray, thus enabling a high−quality glass−ceramic scintillator without agglomeration and Ostwald ripening. This glass−ceramic scintillation film with a thickness of 250 μm achieves a low detection limit of 326 nGy air s −1 and a high spatial resolution of 13.9 lp mm −1 . More importantly, it displays remarkable scintillation stability under X−ray irradiation (radiation intensity can still reach 95% at 278 μGy air s −1 for 3600 s), water soaking (150 days), and high−temperature storage (150 days at 60 °C). Hence, this work presents a approach to construct ultrastable and flexible scintillation films for X−ray imaging with reduced light scattering and improved resolution.
研究领域:
材料科学
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医学影像
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2024
·
IF 6
Yongqiang Zhou,Zixian Wang,linfeng Guo,Lei Huang,Yichen Liu,Mengyue Wu,Qian Zhang,Kang An,Peng He,Fei Wang,Juan Du,Zhengzheng Liu,Zhiping Hu,Yuxin Leng,Yayun Pu,Jun’an Lai,Xiaosheng Tang
Supersensitive and fast X-ray imaging is of great importance in medical diagnosis, industrial flaw detection, security and safety inspection, and frontier science exploration. As the core of detection devices, new generation scintillators require small self-absorption capacity, short fluorescence lifetime, simple film-making protocol, excellent stability and non-toxicity. Herein, a new type of lead-free organic silver halide TPPAgX2 (TPP = C24H20P and X = I, Br, and Cl) is rationally developed with a large Stokes shift (176 nm) and ultralow photoluminescence decay (3.8 ns lifetime). It achieves an ultrafast fluorescent response that is the best among all the Pb-free perovskite scintillators. Temperature-dependent PL and DFT calculations together confirm that TPPAgCl2 follows an emission mechanism in which a triplet exciton can be rapidly upconverted via thermal activation. A series of TPPAgX2-based flexible scintillator films were fabricated and tested. A detection limit of 0.447 μGyair s−1 was obtained for TPPAgCl2, which is one order of magnitude lower than the medical X-ray diagnosis requirement. In addition, it exhibits a superior X-ray imaging resolution of 11.87 lp mm−1. The excellent performance and simple preparation methodology are expected to be potentially applicable for large-scale manufacturing.
研究领域:
材料科学
·
医学影像
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dong Yang,Kun Ge,Huiyun Ban,Xinyang Chu,Shan Liu,Sen Qian,Zhehao Hua,Hua Cai,Danping Chen,Jinsheng Jia,Xinyuan Sun,Jing Ren,Gao Tang,Minghui Zhang,Jiawen Xiao,Yiping Du
High transparency Ce 3+ -doped dense gadolinium aluminum borosilicate (GS x ) glass scintillator was synthesized in reducing atmosphere by melt-quenching process. The transmittance of the glasses exceeds 80%, and the light attenuation length is between 5-20 cm within the range of 400–600 nm. GS x glass shows an photoluminescence (PL) in range of 350–550 nm, with the strongest emission peak around 420 nm. The PL decay time of GS x glasses is around 37 ns, with a maximum PL quantum yield of 44.05%. The integrated X-ray excited luminescence (XEL) intensity of GS S glass is 52.5% compared with BGO crystal. For X-ray imaging, GS L glass based imaging system shows a high spatial resolution of 9 lp/mm, which is comparable to CsI:Tl X-ray detectors. Under γ-ray, the highest light yield of GS S glass is 1235 ph/MeV with an energy resolution of 24.0% at 662 keV, close to that of BSO crystal. The scintillation decay time of GS x glasses is consisted of fast (∼100 ns) and slow (∼560 ns) components. In thermally stimulated luminescence (TSL), GS S glass exhibits a strong TSL peak at approximately 440 K, with low intensity shoulders at about 520 K, implying different types of defects and traps. Therefore, GS x glass has promising prospects for X-ray imaging and high-energy physics applications.
研究领域:
材料科学
·
核技术应用
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jinhai Yang,Xixi Huang,Xieming Xu,Hao Lu,Shuaihua Wang,Shaofan Wu
Scintillation materials have been widely used in various fields, such as medical diagnosis and industrial detection. Chalcogenides have the potential to become a new generation of high-performance scintillation materials due to their high effective atomic number and good resistance to radiation damage. However, research on their application in radiation detection is currently very scarce. Herein, single crystals of rare earth ion-doped ternary chalcogenides NaGaS2/Eu were grown by a high-temperature solid-phase method. It exhibits unique characteristics of structure transformation by absorbing water molecules from the air. To maintain the anhydrous phase of the material, we have used a strategy of organic–inorganic composites of epoxy resin and NaGaS2/Eu to prepare devices for radiation detection and discuss the irradiation luminescence properties of the two phases. The anhydrous phase of NaGaS2/Eu demonstrates excellent sensitivity to X-rays, with a low detection limit of 250 nGy s–1, which is approximately 1/22 of the medical imaging dose. Additionally, composite flexible films were prepared, which exhibited excellent performance in X-ray imaging. These films enable clear observation of a wide range of objects with a high spatial resolution of up to 13.2 line pairs per millimeter (lp mm–1), indicating that chalcogenide holds promising prospects in the realm of X-ray imaging applications.
研究领域:
材料科学
·
医学影像
·
辐射检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jitao Cao,Zhao Guo,Shuang Zhu,Yanyan Fu,Hao Zhang,Qing Wang,Zhanjun Gu
Scintillators, as spectral and energy transformers, are essential for X-ray imaging applications. However, their current disadvantages, including high-temperature sintering and generation of agglomerated powders or large bulk crystals, may not meet the increasing demands of low cost, nontoxicity, and flexible radiation detection. Thus, improved perovskite scintillators are developed in this research. A hybrid perovskite ((C8H17NH3)2SnBr4), which is nontoxic, lead-free, and organic–inorganic, is developed as a scintillator with good emission performance and radioluminescence intensity. These perovskite scintillators are synthesized at low temperatures in an aqueous acid solution, through which they generate a near-unity photoluminescence quantum yield of 98% with the excitation of ultraviolet light. As far as we know, this work is the first to show that the two-dimensional (2D) (C8H17NH3)2SnBr4 perovskite scintillator films prepared by coating a polymer layer can be applied to an X-ray imaging system. The results demonstrate that the low cost X-ray imaging device with good resolution and performance benefits dramatically from this lead-free organic–inorganic hybrid perovskite film. Therefore, this 2D-layered (C8H17NH3)2SnBr4 perovskite scintillator may be a high potential candidate for scintillating material for X-ray imaging techniques.
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 8
·4615-4623
·
IF 4.036
Hao Lu,Xieming Xu,Guiqing Feng,Baoping Sun,Shuaihua Wang,Shaofan Wu
Radiographic screens are widely used in high energy physics, national defense, aviation, radiodynamic therapy and medical imaging due to their scintillation materials that can transform high-energy particles or rays into ultraviolet (UV) visible light or other signals. In recent years, lanthanide doped fluoride nanocrystals (NCs) have attracted much attention due to their excellent optical properties and stability. In this work, multiple lanthanide-doped LiLuF4 nanocrystal scintillation materials were synthesized by thermal decomposition. Among them, Tb-doped LiLuF4 nanocrystals have high X-ray sensitivity and low detection limit (36.31 nGy s−1), which is much lower than the requirement of medical imaging dose rate. After the irradiation of 42.29 mGy s−1 X-ray for 1 hour, the intensity of radioluminescence basically remained unchanged. Based on the good properties of our nanocrystals, we further prepared the flexible film of nanocomposites with epoxy resin. This kind of uniform, large area, high loaded flexible film exhibits excellent performance in X-ray imaging with a spatial resolution greater than 20 line pairs per millimeter (LP/mm).
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 13
·3974-3982
·
IF 7
Tianshe Yang,Luo Guo,Hao Wang,Xueli Xu,Peilin Wu,Ning Zhang,Xiangmei Liu,Shujuan Liu,Qiang Zhao
X-ray excited luminescence (XEL) of scintillators is significant for imaging applications in the fields of medical detection, information retrieval, and scientific research. In this case, lanthanide-doped rare-earth nanophosphors show potential as next-generation scintillators owing to their facile synthesis, high chemical stability and photostability, and adjustable XEL emission. In this study, a new type of XEL-enhanced NaLuF4-based nanophosphor was synthesized by doping Tb3+ to sensitize the emission of Eu3+, facilitating the application of the as-prepared nanoscintillators for X-ray imaging on opaque samples and biological specimens. NaLuF4:Gd/Tb/Eu with 5% Tb-doping showed the highest XEL intensity owing to the energy transfer process between Tb3+ and Eu3+. The NaLuF4:Gd/Tb/Eu (10/5/15 mol%) nanoparticles exhibited an excellent scintillation performance with a high light yield of 15 313 photons MeV−1 and low detection limit of 84.1 nGyair s−1. The X-ray imaging test using the NaLuF4:Gd/Tb/Eu (10/5/15 mol%)-based scintillation film exhibited a high spatial resolution of 8.7 lp mm−1. Furthermore, the NaLuF4:Gd/Tb/Eu (10/5/15 mol%)-based scintillation film was applied in X-ray imaging with high contrast for a spring sealed in a capsule and a crab.
研究领域:
材料科学
·
医学影像
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）