JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 7
·1-10
·
IF 2.8
Gong Guoliang,Liu Chun,Zhu Jiawei,Huang Guojun,Zhang Tianyong
Compounds with crystallization and vitrification capabilities can achieve more uniform grains with higher crystalline density after glass crystallization, improving the fluorescence properties of glass ceramics (GCs). In this work, a series of Tb 3+ -doped SrLa 2 Ga 4 Si 2 O 14 glasses and glass ceramics were prepared through traditional melt quenching and thermal treatment. The glass exhibits good transmittance and a sharp exothermic peak at 961 ºC. The photoluminescence and radioluminescence properties were studied in detail, and the Tb 3+ aggregation in glass and GC was discussed. Compared with the glasses, the opaque GCs show inferior fluorescence properties but better X-ray irradiated fluorescence, about 10% of the integrated emission intensity of the commercial BGO scintillation crystal. More precise processing in glass–ceramics towards homogeneous crystallization and good transmittance need to be addressed, and a promising scintillator with improved scintillating performance can be expected.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 23
·4103-4108
·
IF 3.545
Weiwei Xu,Hui Xu,Shuaihua Wang,Zhilin Wang,Xieming Xu,Xianhui Zhang,Shaofan Wu
Scintillators, which can emit visible photons under γ- or X-ray excitation, are widely used in radiation detection. Traditional inorganic scintillators usually have some drawbacks, such as hygroscopicity or a high synthesis temperature, and most of them are poisonous. Hence, we report the synthesis of metal iodate scintillators (Eu(IO3)3 and Tb(IO3)3) by a facile hydrothermal reaction that exhibit good radioluminescence (RL) intensity. To further increase the RL intensities, we prepared Eu(IO3)3:xSm and Tb(IO3)3:xGd with stronger RL intensities and higher sensitivities than BaF2 and PbWO4 powders when x = 3%. Furthermore, we obtained scintillating films consisting of Eu(IO3)3:3%Sm and Tb(IO3)3:3%Gd for X-ray imaging. Our Eu(IO3)3:3%Sm and Tb(IO3)3:3%Gd films revealed excellent luminescence under high-energy X-ray excitation and spatial resolutions down to 9 lp mm−1 and 8 lp mm−1, respectively. Thus, these films can be regarded as candidate materials for X-ray imaging.
研究领域:
材料科学
·
辐射探测
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2021
·Vol. 21
·期 1
·616-624
·
IF 2.025
Tao Yang,Junhui Wang,Jiali Tu,Xiaoxi Zhou,Jiamin Sun,Jian Chen,Wanxin Wen,Yanfei Wang
Cancer prevention and treatment are currently the focus of most research. Dose verification is an important step for reducing the improper dose deposition during radiotherapy. To mend the traditional gel dosimeters for 3D dose verification, a novel rare-earth nanoparticle-based composite gel was prepared, which has good radioluminescence property and reusability. It is a promising phantom material for the new 3D gel dosimeter. TEM, DLS, FT-IR, TGA, and spectrofluorometer were used to determine the chemical structure, micromorphology, and optical performance. Compared to the traditional gel dosimeters, the composite gel has a good linear relationship between the light intensity excited by X-ray and the tube current. Furthermore, it may measure the dose distribution immediately in situ , which reduces errors and saves time. This work provides a new idea for the research of 3D gel dosimeters and promotes the safe and effective use of radiotherapy.
研究领域:
医学物理
·
放射治疗
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Sijian Wu,Lifang Yuan,Geng Chen,Zhenzhang Li,Yahong Jin
Low-dimensional-networked metal halide (MH) materials are emerged as a new class of semiconductors owing to their unique structure and outstanding photoelectric properties . Compared with the extensively studied three-dimensional (3D) MHs, the zero-dimensional (0D) MHs are of great interest to be widely studied. Here we report the successful colloidal synthesis of all-inorganic lead-free 0D MHs, including undoped and Cu-doped Rb 2 ZnCl 4 quantum dots (QDs) with bright broad blue and cyan emissions, respectively. Combining the theoretical and experimental study, the band structures are well characterized and the originations of the blue and cyan emissions are attributed to the singlet and triplet self-trapped exciton (STE) emissions, respectively. Finally, owing to the bright radioluminescence (RL), the Cu-doped Rb 2 ZnCl 4 QDs is prepared into a thin film to demonstrate the feasibility for X-ray imaging application. This work not only provides a cyan-emitting all-inorganic 0D MH QDs, but also exploits it as a scintillator for X-ray imaging.
研究领域:
材料科学
·
半导体物理
·
纳米技术
·
成像科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Tiao Feng,Zi’an Zhou,Yi’ni An,Long Chen,Yuhua Fu,Shuyun Zhou,Nü Wang,Jinxiao Zheng,Chenghua Sun
Nonlead low-dimensional halide perovskites attract considerable attention as X-ray scintillators. However, most scintillation screens exhibit pronounced light scattering, which detrimentally reduces the quality of X-ray imaging. Herein, we employed a simple and straightforward solvent-free melt-quenching method to fabricate a large-area zero-dimension (0D) antimony-based perovskite transparent medium, namely (C20H20P)2SbCl5 (C20H20P+ = ethyltriphenylphosphine). The transparency is due to the large steric hindrance of C20H20P+, which hinders the formation of crystals during the quenching process, thus forming a glass with low refractive index and uniform structure. This medium exhibits a high transmittance exceeding 80% in the range of 450–800 nm and shows a large Stokes shift of 245 nm, thereby minimizing light scattering, mitigating self-absorption, and enhancing the clarity of X-ray imaging. Moreover, it exhibits a high radioluminescence light yield of ∼12,535 photons MeV–1 and displays a high X-ray spatial resolution of 30 lp mm–1 owing to its high transparency. This study presents an alternative candidate for achieving high-quality X-ray detection and extends the applicability of transparent perovskite scintillators.
研究领域:
材料科学
·
光学
·
医学成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Panyi Wang,Mengmeng Meng,Man Nie,Xiaoyu Hu,Peiqing Cai,Muzhi Cai,Lei Lei,Laurent Calvez,Xianghua Zhang,Shiqing Xu
The development of all-inorganic lead-free Cs 3 Cu 2 I 5 perovskite materials has garnered significant attention due to their non-toxic nature and unique optoelectronic properties, particularly in the field of X-ray detection. However, the stability of perovskites remains a major concern for their optical applications. In this study, a highly stable Cs 3 Cu 2 I 5 -in-glass composite (Cs 3 Cu 2 I 5 @Borosilicate) is fabricated by spark plasma sintering (SPS), a rapid and low-temperature sintering process. The Cs 3 Cu 2 I 5 @Borosilicate composite exhibits strong photoluminescence even after prolonged immersion in various polar solvents, whereas Cs 3 Cu 2 I 5 perovskite loses its photoluminescence within seconds. Moreover, the Cs 3 Cu 2 I 5 @Borosilicate composite demonstrates robust radio-luminescence under X-ray irradiation, and its potential as a scintillator material is validated through prototype X-ray imaging with a high spatial resolution (≈7 lp mm −1 ). This innovative composite material holds immense potential for scintillation applications and represents a promising approach for encapsulating perovskites in a transparent amorphous medium.
研究领域:
材料科学
·
光电技术
·
放射学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
·
2023
·Vol. 9
·期 37
·
IF 13.6
Xudong Hu,Sihan Luo,Jing Leng,Chujie Wang,Yiyang Chen,Jun Chen,Xiaoming Li,Haibo Zeng
X-ray imaging based on a single gray level shows visual blind parts and affects accurate judgment in some situations. Color-cognized x-ray imaging will boost the recognition capability, which has not yet been reported. Here, we propose a quartz-assisted chromatic x-ray imaging model based on metal halide nanocrystal (NC) stacked scintillators. Mutually inactive (BA)2PbBr4:Mn and Cs3Cu2I5:Tl enable x-ray energy- or density-dependent radioluminescence (RL) color variation. The upper scintillator light yield and the bottom scintillator transmittance are enhanced by elaborate in situ passivation of phenethylamine bromide and NC orientation regulation, respectively. Imaging targets with different densities are distinguished on RL spectra, and the color coordinates shift linearly on CIE 1931. An algorithm balances the image details of different gray areas and enhances the visual perception by color filling. This work provides color recognition between objects with different densities and takes a step toward chromatic x-ray imaging applied to practical scenarios.
研究领域:
医学成像
·
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 3
·2102074
·
IF 9.926
Zi Chen,Dongdong Lu,Hangqing Xie,Xiaolei Yang,Yang Li,Chenhao Bao,Lei Lei,Shiqing Xu
The increasing demand for radiation detection in many applications has led to demanding requirements for scintillators. Realizing low-dose, pollution-free, and reliable X-ray detection has become a key technical challenge. Here, a triplet-enhanced lanthanide radioluminescence (RL) material Ga 3+ /Tb 3+ metallacrowns (Tb-1) is reported. This Tb-1 crystal emits bright green luminescence under ultraviolet light or X-ray excitation, and the emission intensity is 286 and 242 times that of Tb 3+ in inorganic salt, respectively. Tb-1 crystal is further passivated by trioctylphosphine oxide (TOPO), and the enhanced RL intensity is equivalent to that of commercial Tl-doped cesium iodide scintillator. In addition, RL of Tb-1–TOPO has an extremely narrow full width at half maximum and an excellent linear response to the X-ray dose rate. The detection limit is calculated to be 0.146 μGy s −1 , which is 38 times lower than typical medical imaging doses. Triplet-enhanced lanthanide RL provides new ideas for replacing scintillators that require high temperature synthesis processes such as inorganic phosphors and ceramics, and provides a new alternative scintillator material for flexible X-ray monitoring, bioimaging, radiotherapy, and other applications.
研究领域:
辐射检测
·
材料科学
·
医学成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hangqing Xie,Mengke Bai,Anqi Wang,Zi Chen,Feifan Chang,Jiadi Lian,Shiqing Xu
Triplet exciton is both a luminescence quenching factor and an important luminescence sensitization technology solution, which is widely concerned in the field of optoelectronic materials. Since X-ray excited triplet excitons are dissipated through various pathways, there are still huge difficulties in achieving efficient triplet sensitized emission. Here, the antenna ligand is regulated through the carboxyl group, increasing the steric hindrance between the conjugated groups and improving triplet-enhanced radioluminescence (RL) efficiencies of Tb 3+ . The lanthanide metal–organic frameworks (Ln-MOFs) formed by the coordination of Tb 3+ with mellitic acid (MA), pyromellitic acid (PMA) and trimesic acid (TMA) under low temperature preparation conditions. Among them, MA-Tb has a longer spacing between conjugated groups than PMA-Tb and TMA-Tb, and its triplet RL is relatively strongest, with a light yield of 28,000 photons MeV −1 . Mechanistic studies revealed that the RL efficiency of Ln-MOFs is related to the π-π stacking effect in the benzene ring. In addition, the application of MA-Tb in the field of X-ray detection was demonstrated. The RL intensity of MA-Tb has a good linear relationship with the X-ray dose rate, and the detection limit for X-ray reaches 82 nGy/s, which is 66 times lower than the typical medical imaging dose. These results will provide a universal strategy for the design of Ln-MOFs scintillator.
研究领域:
材料科学
·
光电材料
·
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）