CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wanqiu Yang,Zhicheng Wang,Xudong Hu,Yingjun Chai,Gaoyu Liu,Shengli Zhang,Haibo Zeng,Xiaoming Li
Scintillator films with high light output and low cross-talk are essential for highly sensitive and high-resolution X-ray imaging applications. However, only specific scintillators prepared with high-cost method or pixelated template meet these demands. Solution processed strategies possess the merit of low-cost while scintillator particles are usually in chaos with severe light scattering, especially for thick films up to hundreds of microns, resulting in poor imaging sensitivity and resolution. Herein, we demonstrate that low-symmetrical zero-dimensional Cs 3 Cu 2 I 5 scintillator can grow longitudinally with spray-coating strategy with the assistance of crystal facet inhibitor. The additive, triallyl isocyanurate, exhibits preferred crystal face binding ability, inducing oriented growth and well-defined columnar structure with large thickness more than one hundred microns. The final scintillator films show higher luminescence polarity and light output, contributing to remarkable improvement in light yield and imaging resolution of 71% and 81% compared with the control sample, respectively. Besides, the added monomer crosslinks under annealing and provide robust protection, leading to excellent radiation hardness and storage stability under ambient environment. By virtue of the negligible afterglow, artifact-free X-ray imaging at a frame rate of 3840 fps is fulfilled, indicating the promising prospects of this strategy for application in low-cost, high-performance fast X-ray imaging.
研究领域:
材料科学
·
医学影像
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nature Photonics
·
2022
·Vol. 16
·期 12
·860-868
·
IF 39.728
Zaffalon Matteo L.,Cova Francesca,Liu Mingming,Cemmi Alessia,Di Sarcina Ilaria,Rossi Francesca,Carulli Francesco,Erroi Andrea,Rodà Carmelita,Perego Jacopo,Comotti Angiolina,Fasoli Mauro,Meinardi Francesco,Li Liang,Vedda Anna,Brovelli Sergio
Radiation detection is of utmost importance in fundamental scientific research, as well as medical diagnostics, homeland security, environmental monitoring and industrial control. Lead halide perovskites (LHPs) are attracting growing attention as high-atomic-number materials for next-generation scintillators and photoconductors for ionizing radiation detection. To unlock their full potential as reliable and cost-effective alternatives to conventional materials, it is necessary for LHPs to conjugate high scintillation yields with emission stability under high doses of ionizing radiation. To date, no definitive solution has been devised to optimize the scintillation efficiency and kinetics of LHPs and nothing is known of their radiation hardness for doses above a few kilograys, to the best of our knowledge. Here we demonstrate that CsPbBr 3 nanocrystals exhibit exceptional radiation hardness for γ-radiation doses as high as 1 MGy. Spectroscopic and radiometric experiments highlight that despite their defect tolerance, standard CsPbBr 3 nanocrystals suffer from electron trapping in dense surface defects that are eliminated by post-synthesis fluorination. This results in >500% enhancement in scintillation efficiency, which becomes comparable to commercial scintillators, and still retaining exceptional levels of radiation hardness. These results have important implications for the widespread use of LHPs in ultrastable and efficient radiation detectors.
研究领域:
材料科学
·
辐射检测
·
纳米技术
·
闪烁体材料
✓ 已验证
产品关联
DOI
高影响因子
Photonics Research
·
2021
·Vol. 9
·期 3
·351-356
·
IF 7.08
Qiang Xu,Juan Wang,Qindong Zhang,Xiao Ouyang,Xiao Ouyang,Maheng Ye,Weiting Xie,Xuewen Yan,Deyuan Li,Xiaoping Ouyang,Xiaoping Ouyang,Xiaoping Ouyang,Xiaobing Tang,Xiaodong Zhang
Bulk scintillators that are with high density, low cost, and fine pulse-height energy spectral resolution, and are non-hygroscopic and user friendly, are desired for high-energy gamma-ray spectroscopy application. Recently, low-cost solution-processed perovskite nanoscintillators have been demonstrated with outstanding performances for indirect low-energy X-ray detection; however, the stability and thickness are not suitable for high-energy gamma-ray detection. Here, we report scintillation performances of a low-cost solution-processed bulk 0D Cs3Cu2I5 single crystal. The self-trapped exciton emission results in a large Stokes shift (109 nm) that is reabsorption free. A broad X-ray excited emission matches well with the sensitivity of a silicon photodiode. The unique Cs+ surrounded isolated [Cu2I5]3− cluster scintillator provides ultra-stability in air and strong radiation hardness under high-dose gamma-ray exposure from a 60Co source. This solution-processed Cs3Cu2I5 scintillator is expected with low-cost and has detection performances comparable to commercial alkali-halide scintillator products.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Wenhao Li,Zexuan Sui,Chunli Fan,Ci Wang,Yao Zhu,Jing Ren,Jianzhong Zhang
Nano-glasses are next-generation scintillators combining favorably the merits of both scintillator crystals and glasses. Here, a new nano-glass scintillator is prepared embedding CsGd 2 F 7 :Ce 3+ nanocrystals (NCs). The microscopic morphology, particle size, and distribution of the NCs are studied by high resolution transmission electron microscopy . Significantly enhanced radioluminescence efficiency is obtained in the nano-glasses. The largest integrable intensity of X-ray excited luminescence is 316% of the standard Bi 4 Ge 3 O 12 (BGO) crystal. A well-resolved full-energy peak with an energy resolution of 17.4% is registered for the 662 keV gamma rays, and the light yield is determined to be 827 ± 8 ph/MeV. The nano-glass scintillators exhibit good radiation hardness and thermal stability. As a proof of concept, an X-ray imaging system of a good resolution is built on the nano-glass scintillators.
研究领域:
材料科学
·
光学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Hai Liang,Fan Wu,Runan Xia,Wei Wu,Siqi Li,Panpan Di,Miao Yang
Perovskites are extensively studied in scintillation detection due to their low cost, simple synthesis, high scintillation light yield, and rapid decay times. However, their instability to light and radiation leads to scintillation performance degradation. To address these stability concerns, this paper proposes a new perovskite nanocrystal (NC) synthesis method that employs aminopropyllsobutyl polyhedral oligomeric silsesquioxane (POSS) as a ligand and a coating layer to passivate the perovskite NCs, significantly enhancing their stability and photoluminescence efficiency. Furthermore, the resultant perovskite/aminopropyllsobutyl POSS nanocomposites exhibit remarkable capabilities in X-ray detection limits, imaging quality, and radiation hardness. These findings underscore the potential of enhanced perovskite in revolutionizing the field of scintillator materials, offering promising pathways for their future applications and development.
研究领域:
材料科学
·
纳米技术
·
放射学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）