Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Yirong Su,Peng Ran,Juan Hui,Wenbo Ma,Zeng Chen,Haiming Zhu,Yang “Michael” Yang
Traditional indirect flat-panel X-ray imaging (FPXI) uses inorganic scintillators with high-Z elements, which lack spectral information about X-ray photons and reflect only integrated X-ray intensity. To address this issue, we developed a stacked scintillator structure that combines organic and inorganic materials. This structure allows X-ray energies to be distinguished in a single shot by using a color or multispectral visible camera. However, the resolution of the resulting dual-energy image is primarily limited by the top scintillator layer. We inserted a layer of anodized aluminum oxide (AAO) between the double scintillators. This layer limits the lateral propagation of scintillation light, improves imaging resolution, and acts as a filter for X-rays. Our research demonstrates the advantages of stacked organic–inorganic scintillator structures for dual-energy X-ray imaging and provides novel and practical applications for relatively low-Z organic scintillators with high internal X-ray-to-light conversion efficiency.
研究领域:
医学成像
·
材料科学
·
辐射探测
·
光学材料
·
X射线光谱学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 9
·1639
·
IF 4.324
Zhigang Sun,Bin Lu,Guiping Ren,Hongbing Chen
A translucent Gd2O2S:Pr ceramic scintillator with an in-line transmittance of ~31% at 512 nm was successfully fabricated by argon-controlled sintering. The starting precipitation precursor was obtained by a chemical precipitation route at 80 °C using ammonia solution as the precipitate, followed by reduction at 1000 °C under flowing hydrogen to produce a sphere-like Gd2O2S:Pr powder with an average particle size of ~95 nm. The Gd2O2S:Pr phosphor particle exhibits the characteristic green emission from3P0,1→3H4transitions of Pr3+at 512 nm upon UV excitation into a broad excitation band at 285–335 nm arising from 4f2→4f5dtransition of Pr3+. Increasing Pr3+concentrations induce two redshifts for the two band centers of 4f2→4f5dtransition and lattice absorption on photoluminescence excitation spectra. The optimum concentration of Pr3+is 0.5 at.%, and the luminescence quenching type is dominated by exchange interaction. The X-ray excited luminescence spectrum of the Gd2O2S:Pr ceramic is similar to the photoluminescence behavior of its particle. The phosphor powder and the ceramic scintillator have similar lifetimes of 2.93–2.99 μs, while the bulk material has rather higher external quantum efficiency (~37.8%) than the powder form (~27.2%).Keywords:Gd2O2S;Pr3+doping;ceramic scintillator;phosphor powder
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 4
·1047-1054
·
IF 1.6
Hu Yichen,Ma Jiaju,Liu Tonghuan,Zhang Yongjie,Yu Yuhong,Sun Zhiyu,Fang Fang,Dong Tianhao,Zhao Yanhong,Zhou Gen
In this paper, three polymeric bases (styrene, vinyl toluene, methyl methacrylate (MMA)) plastic scintillators were synthesized by thermal and UV irradiation polymerization. The influences of the concentrations of the primary fluorescent agent 2.5-diphenyloxazole (PPO) and wave-shift agent 1,4-bis-2(5-phenyloxazoyl)benzene (POPOP) on plastic scintillators characterization were investigated. The results suggest that the maximum emission wavelength of synthesized plastic scintillators with different polymeric base are all around 423 nm matching with maximum response wavelength of general photoelectric devices, and its decay time with several nanoseconds has reached the same level as the EJ-200. The maximum light yield of the plastic scintillator was achieved when the mass ratio of PPO/POPOP is 1.0%/0.02% for the styrene plastic scintillators.
研究领域:
材料科学
·
核技术
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2022
·Vol. 16
·期 7
·2100736
·
IF 10.947
Baiqian Wang,Jiali Peng,Xin Yang,Wensi Cai,Hongbin Xiao,Shuangyi Zhao,Qianqian Lin,Zhigang Zang
Metal halide perovskite-based high-performance X-ray scintillator is considered as one of the most favorable candidates applied in the fields of medicine, industry, and science. However, the current X-ray scilltillators based on perovskites still suffer from the issue of poor stability, which impedes their further wide applications. Herein, a template assembled method to prepare large-size, flexible, and stable CsPbBr 3 @Polymethyl methacrylate composite films in ambient conditions is developed and their detection performance is studied. The composite films can maintain 94% and 81% of the initial PL intensity after 2000 cycles bending and storing in water over 2520 h, respectively. In addition, the prepared scintillators exhibit not only a low detection limit of 40.1 nGy air s −1 and a high spatial resolution of 8.0 lp mm −1 , but also an excellent tolerance against radiation (108 h). Thus, this simple but yet effective method would not doubt pave the way for further development of scintillators and might be well applicable to other metal halides.
研究领域:
材料科学
·
医学影像
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Chang Gu,Tao Wang,Xian Qin,Xiaogang Liu
Scintillators are essential in applications, such as homeland security, nuclear physics, and geological exploration. However, conventional scintillators often suffer from degradation under polar chemical conditions, resulting in scintillation quenching and structural decomposition. Here, a molecular engineering strategy is demonstrated to enhance scintillator stability and performance through halogen-bonded lattice reconstruction. The synthesis of a copper cluster scintillator, (X-MBA) 4 Cu 4 I 4 (X: Br or Cl, MBA: S -methylbenzylamine) is reported, where halogen bonding improves lattice symmetry and rigidity, effectively suppressing electron-phonon coupling and defect trapping. The halogenated copper clusters exhibit a photoluminescence quantum yield of ≈90%, a 13-fold increase in light yield, and an X-ray detection limit of 28.8 nGy air s −1 , outperforming halogen-free counterparts. These scintillators maintain their structural integrity and performance even after prolonged exposure to polar chemical solvents. The combination of molecular design and structural robustness enables high-resolution X-ray imaging (22 lp mm −1 ) across various chemical environments, paving the way for high-performance scintillators with exceptional durability and efficiency.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Jinmei Song,Yuhong He,Haijing Hu,Mingbian Li,Chenglong Li,Bai Yang,Haotong Wei
Computed tomography (CT) imaging has emerge as an effective medical diagnostic technique due to its rapid and 3D imaging capabilities, often employing indirect imaging methods through scintillator materials. Arraying scintillators that can confine light scattering to enable high-resolution CT imaging remains an area of ongoing exploration for emerging perovskite scintillators. Here an anti-scattering cesium lead bromide (CsPbBr 3 ) scintillator array embedded within a polyurethane acrylate matrix for CT imaging using a cost-effective solution-processed method is reported. Due to the large refractive index contrast between the scintillator and matrix, photon propagation can be well confined within the CsPbBr 3 scintillator array to significantly suppress the light scattering and enhance the light collection efficiency by nearly two times compared to the monolithic film. Furthermore, the scintillator array exhibits low-dosage and high-resolution CT imaging capability by reconstructing a 3D tooth image with a good spatial resolution of 20.1 lp cm −1 at a low effective dose of 0.22 mSv. This work highlights that the CsPbBr 3 scintillator array is a highly promising candidate for CT imaging.
研究领域:
医学影像
·
材料科学
·
放射学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2019
·Vol. 31
·期 44
·1904711
·
IF 25.809
Bo Yang,Lixiao Yin,Guangda Niu,Jun-Hui Yuan,Kan-Hao Xue,Zhifang Tan,Xiang-Shui Miao,Ming Niu,Xinyuan Du,Haisheng Song,Efrat Lifshitz,Jiang Tang
Scintillators are widely utilized for radiation detections in many fields, such as nondestructive inspection, medical imaging, and space exploration. Lead halide perovskite scintillators have recently received extensive research attention owing to their tunable emission wavelength, low detection limit, and ease of fabrication. However, the low light yields toward X-ray irradiation and the lead toxicity of these perovskites severely restricts their practical application. A novel lead-free halide is presented, namely Rb 2 CuBr 3 , as a scintillator with exceptionally high light yield. Rb 2 CuBr 3 exhibits a 1D crystal structure and enjoys strong carrier confinement and near-unity photoluminescence quantum yield (98.6%) in violet emission. The high photoluminescence quantum yield combined with negligible self-absorption from self-trapped exciton emission and strong X-ray absorption capability enables a record high light yield of ≈91056 photons per MeV among perovskite and relative scintillators. Overall, Rb 2 CuBr 3 provides nontoxicity, high radioluminescence intensity, and good stability, thus laying good foundations for potential application in low-dose radiography.
研究领域:
材料科学
·
辐射探测技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 51
·2107843
·
IF 18.808
Weijun Li,Lulu Liu,Mingrui Tan,Yuhong He,Chunjie Guo,Huimao Zhang,Haotong Wei,Bai Yang
Both semiconductors and scintillators have their own advantages in direct and indirect X-ray detection, respectively. However, they are also limited by their intrinsic properties and detection mechanisms. Here, a low-cost and large-area flat X-ray detector is reported by combining a cesium silver bismuth bromide (Cs 2 AgBiBr 6 ) perovskite semiconductor with a ethylenebis-triphenylphosphonium manganese (II) bromide ((C 38 H 34 P 2 )MnBr 4 ) scintillator through fast tableting processes. Cs 2 AgBiBr 6 and (C 38 H 34 P 2 )MnBr 4 can attenuate the X-ray photons to induce charge carriers that are collected through the continuous Cs 2 AgBiBr 6 grains. (C 38 H 34 P 2 )MnBr 4 blocks the Cs 2 AgBiBr 6 ions migration paths at the grain boundaries to reduce the device dark current/noise and improves the working stability. Most charges generated by (C 38 H 34 P 2 )MnBr 4 are transferred to the adjacent Cs 2 AgBiBr 6 , and recombined charges radiate light through scintillation, which will be further absorbed by the surrounding Cs 2 AgBiBr 6 perovskite, and further induce collectable charges for indirect X-ray detection, avoiding the unwanted light scattering, self-absorption, or afterglow effects of scintillators. The hybrid X-ray detector displays a high sensitivity of 114 µC Gy air −1 cm −2 to 120 keV p hard X-rays with a lowest detectable dose rate of 0.2 μGy air s −1 , showing 75 times lower detection limit compared to (C 38 H 34 P 2 )MnBr 4 scintillator, which provides a new path for X-ray flat-panel design.
研究领域:
材料科学
·
医学影像
·
物理学
✓ 已验证
DOI
高影响因子
Nuclear Science and Techniques
·
2022
·Vol. 33
·期 8
·1-11
·
IF 2.389
Lü Zhi-Wei,Wei Gong-Xiang,Wang Han-Qiu,Guan Yu,Jiang Ning,Liu Yun-Yan,Li Zhao,Qin Hua,Liu Hui-Qiang
The evolution of lead halide perovskites used for X-ray imaging scintillators has been facilitated by the development of solution-processable semiconductors characterized by large-area, flexible, fast photoresponse. The stability and durability of these new perovskites are insufficient to achieve extended computed tomography scanning times with hard X-rays. In this study, we fabricated a self-assembled CsPbBr 3 -based scintillator film with a flexible large-area uniform thickness using a new room-temperature solution-processable method. The sensitivity and responsivity of X-ray photon conversion were quantitatively measured and showed a good linear response relationship suitable for X-ray imaging. We also demonstrated, for the first time, that the self-assembled CsPbBr 3 -based scintillator has good stability for hard X-ray microtomography. Therefore, such an inexpensive solution-processed semiconductor easily prepared at room temperature can be used as a hard X-ray scintillator and equipped with flexible CsPbBr 3 -based X-ray detectors. It has great potential in three-dimensional high-resolution phase-contrast X-ray-imaging applications in biomedicine and material science because of its heavy Pb and Br atoms.
研究领域:
材料科学
·
医学影像
·
半导体技术
✓ 已验证
DOI
高影响因子
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
·
2019
·
IF 1.433
Sangmin Lee,Jaebum Son,Dong Geon Kim,Joonbum Choi,Yong Kyun Kim
Production of plastic scintillators using 3D printing technology has gained increased interest, and related researches are being published. However, research results show that the performance of plastic scintillators, such as light yield or decay time, is still poor compared to that of commercial products. In order to improve the scintillator performance, a UV-curable solution was prepared by applying ADS148BE, a new wavelength shifter, from which a plastic scintillator was fabricated using a UV LED curing machine. The maximum emission wavelength of the prepared scintillator occurred at 429 nm. The transmittance at peak emission was 49%. The scintillation efficiency was measured to be 43% of BC408 (Saint-Gobain Crystals). The light yield was determined to be 35% of BC408. It is about 1.9 times better than that of a scintillator fabricated by a UV lamp of a previously published paper [12]. The light output was estimated as 33.7% of BC408. The decay time was approximately 2.46 ns. This is the relative value measured after setting the decay time of the reference scintillator to match the manufacturer’s data. Compared to the UV-curable plastic scintillator of previously reported studies, we have improved the overall performance of our sample and will be able to make precise shapes with a 3D printer.
研究领域:
材料科学
·
核技术
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2019
·Vol. 9
·期 10
·512
·
IF 2.061
Xiuhua Liu,Tonghua Zhu,Qingyuan Hu,Lan Dong,Zhaoyi Tan
9,10-diphenylanthracene (DPA) single crystal is a promising scintillator material for fast-neutron detection. Two centimetre-sized polymorph crystals of DPA were grown by melting and solution methods (DPA-Melt and DPA-Solution, respectively), and characterised by single-crystal X-ray diffraction, Raman spectroscopy, Fourier-transform infrared spectroscopy, fluorescence spectroscopy, UV-Vis absorbance spectroscopy, and thermogravimetric/differential scanning calorimetry. The DPA-Melt crystal possessed a P21/n structure, with excitation bands at approximately 331, 348, 367, and 387 nm, and the strongest emission wavelength at approximately 454 nm. On the other hand, the DPA-Solution crystal possessed a C2/c structure, with excitation bands at approximately 335, 353, 372, and 396 nm, and the strongest emission wavelength at approximately 468 nm. The two kinds of DPA crystals have the same molecular formula but different crystal structures, crystal lattice constants, and cell parameters. The theoretical density of the DPA-Solution crystal was 1.239 g/cm3, while that of the DPA-Melt crystal was 1.211 g/cm3. The two types of crystals exhibited the same melting point, but the thermal stability of the DPA-Solution crystal is better than that of the DPA-Melt crystal.Keywords:diphenylanthracene;polymorph;crystal structure;scintillator;neutron detection
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Zixu Zhang,Xueyuan Guo,Keke Huang,Xiaoqi Sun,Xiaoming Li,Haibo Zeng,Xuanbo Zhu,Ying Zhang,Renguo Xie
Scintillators have recently attracted increased attention because of their potential applications in various fields, such as medical imaging, security, and nondestructive inspection . However, the response time of commercial scintillators is normally in microseconds or milliseconds only, a property that restricts their practical applications in high-resolution and dynamic X-ray imaging. Here, we report Rb 2 AgCl 3 crystals as an efficient scintillator material with ultrafast response time. The Rb 2 AgCl 3 crystals were found to have a one-dimensional structure and a bright-orange emission peak at 580 nm and a quantum yield of 60.0%. Experimental and computational studies revealed that the strong emission might have originated from self-trapping excitons that resulted into large Stokes shifts and high quantum efficiency. Upon X-ray excitation, the Rb 2 AgCl 3 crystals displayed a fast scintillation decay time of 9.5 ns and achieved a light yield of 18,300 photons MeV −1 . The ratio of light yield to decay time could reach up to 1926 photons MeV −1 ns −1 , which was higher than that of existing commercial scintillators. As a scintillator, Rb 2 AgCl 3 crystals are a promising material with potential applications in dynamic real-time imaging with a high spatial resolution owing to its nontoxicity, good stability, high light yield, and short decay time.
研究领域:
材料科学
·
医学成像
·
光学
✓ 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）