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Two-Dimensional Perovskite Single Crystals for High-Performance x-ray imaging and Exploring MeV x-ray Detection

Energy & Environmental Materials 2024年第1期7卷 139-146页

作者： xieming xu Yiheng Wu Yi Zhang xiaohui Li Fang Wang xiaoming Jiang Shaofan Wu Shuaihua Wang Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Division of Nuclear Technology and Applications Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Scintillation semiconductors play increasingly important medical diagnosis and industrial inspection ***,two-dimensional(2D)perovskites have been shown to be promising materials for medical x-ray imaging,but they are mostly used in low-energy(≤130 keV)*** detection of MeV x-rays,which ensure thorough penetration of the thick shell walls of containers,trucks,and aircraft,is also highly desired in practical industrial ***,scintillation semiconductors for high-energy x-ray detection are currently ***,This paper reports a 2D(C_(4)H_(9)NH_(3))_(2)PbBr_(4)single crystal with outstanding sensitivity and stability toward x-ray radiation that provides an ultra-wide detectable x-ray range of between 8.20 nGy_(air)s^(-1)(50 keV)and 15.24 mGy_(air)s^(-1)(9 MeV).The(C_(4)H_(9)NH_(3))_(2)PbBr_(4)single-crystal detector with a vertical structure is used for high-performance x-ray imaging,delivering a good spatial resolution of 4.3 Ip mm^(-1)in a plane-scan imaging *** ionic migration in the 2D perovskite enables the vertical device to be operated with hundreds of keV to MeV x-ray radiation at high bias voltages,leading to a sensitivity of 46.90μC Gy_(air)-1 cm^(-2)(-1.16 Vμm^(-1))with 9 MeV x-ray radiation,demonstrating that 2D perovskites have enormous potential for high-energy industrial applications.

关键词： MeV x-ray detection single-crystal x-ray detectors two-dimensional perovskites x-ray imaging

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The new x-ray imaging and biomedical application beamline BL13HB at SSRF

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Nuclear Science and Techniques 2023年第12期34卷 190-205页

作者： Jian‑Feng Ji Han Guo Yan‑Ling xue Rong‑Chang Chen Ya‑Nan Fu Guo‑Hao Du Biao Deng Hong‑Lan xie Ti‑Qiao xiao Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics China Academy of ScienceShanghai 201800China

A new x-ray imaging and biomedical application beamline(BL13HB)has been implemented at the Shanghai Radiation Synchrotron Facility(SSRF)as an upgrade to the old x-ray imaging and biomedical application beamline(BL13W1).This is part of the Phase II construction project of the *** BL13HB is dedicated to 2D and 3D static and dynamic x-ray imaging,with a field of view of up to 48.5 mm×5.2 mm and spatial resolution as high as 0.8μm.A super-bending magnet is used as the x-ray source in BL13HB,which has a maximum magnetic field of 2.293 *** energy range of monochromatic x-ray photons from a double-multiplayer monochromator was 8–40 keV,and the white beam mode was provided on the beamline for dynamic x-ray imaging and dynamic x-ray *** maintaining the previous experimental setup of BL13W1,new equipment was added to the beamline experimental *** beamline is equipped with different sets of x-ray imaging detectors for several experimental methods such as micro-CT,dynamic micro-CT,and pair distribution *** experimental station of BL13HB is designed specifically for various in situ dynamic experiments,and BL13HB has been open to users since June 2021.

关键词： x-ray imaging Dynamic micro-CT Shanghai Synchrotron Radiation Facility

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Centimeter-sized Cs_(3)Cu_(2)I_(5)single crystals grown by oleic acid assisted inverse temperature crystallization strategy and their films for high-quality x-ray imaging

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Journal of Energy Chemistry 2023年第4期79卷 382-389页

作者： Tao Chen xin Li Yong Wang Feng Lin Ruliang Liu Wenhua Zhang Jie Yang Rongfei Wang xiaoming Wen Bin Meng xuhui xu Chong Wang National Center for International Research on Photoelectric and Energy Materials School of Materials and EnergyYunnan UniversityKunming 650091YunnanChina College of Materials Science and Engineering Key Laboratory of Advanced Materials of Yunnan ProvinceKunming University of Science and TechnologyKunming 650093YunnanChina Centre for Translational Atomaterials Swinburne University of TechnologyHawthorn 3122Australia

Low-dimensional halide perovskites have become the most promising candidates for x-ray imaging,yet the issues of the poor chemical stability of hybrid halide perovskite,the high poisonousness of lead halides and the relatively low detectivity of the lead-free halide perovskites which seriously restrain its ***,we developed a solution inverse temperature crystal growth(ITCG)method to bring-up high quality Cs_(3)Cu_(2)I_(5)crystals with large size of centimeter order,in which the oleic acid(OA)is introduced as an antioxidative ligand to inhibit the oxidation of cuprous ions effieiently,as well as to decelerate the crystallization rate *** on these fine crystals,the vapor deposition technique is empolyed to prepare high quality Cs_(3)Cu_(2)I_(5)films for efficient x-ray *** surface morphology,high light yields and short decay time endow the Cs_(3)Cu_(2)I_(5)films with strong radioluminescence,high resolution(12 lp/mm),low detection limits(53 nGyair/s)and desirable ***,the Cs_(3)Cu_(2)I_(5)films have been applied to the practical radiography which exhibit superior x-ray imaging *** work provides a paradigm to fabricate nonpoisonous and chemically stable inorganic halide perovskite for x-ray imaging.

关键词： Inverse temperature crystal growth Cs_(3)Cu_(2)I_(5)single crystal Vapor deposition Cs_(3)Cu_(2)I_(5)films x-ray imaging

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Design and Synthesis of Tb^(3+)-doped KGW Crystal for the Exploration of Scintillation Performance with x-ray imaging

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Chinese Journal of Structural Chemistry 2021年第8期40卷 1023-1030,969页

作者： xU Hui xU Wei-Wei xU Liu-Wei WANG Zhi-Lin WANG Shuai-Hua SU Qing ZHANG Bi-Sheng ZENG Qing-You WU Shao-Fan College of Chemistry Fuzhou UniversityFuzhou 350108China Key Laboratory of Optoelectronic Materials Chemistry and Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient DevicesFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Communications Planning&Design Institute Company Fuzhou 350004China Fujian Luhai Engineering Investigation&Designing Company Fuzhou 350000China

x-ray scintillators have been widely used in many fields owing to their strong penetrating ability,including security inspection,medical imaging,nuclear cameras,high energy physics and so *** explore new scintillation materials,we designed and synthesized KGW:Tb bulk scintillation crystals with monoclinic phase *** explored the fluorescence performance of KGW:Tb by testing the photoluminescence spectrum and fluorescence decay curve and observed strong green light emission in the visible light range at room ***,our crystal has a high stability under x-ray irradiation,a good sensitivity response and an appreciable light output(3424 ph/MeV)that is approximately twenty times more than ***,we used a 0.98 mm thickness polished crystal sheet for x-ray imaging applications and observed excellent ***,KGW:Tb crystal may be an important direction for x-ray scintillation detection.

关键词： KGW x-ray scintillators light yield high stability x-ray imaging

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Methodology development and application of x-ray imaging beamline at SSRF

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Nuclear Science and Techniques 2020年第10期31卷 74-94页

作者： Hong-Lan xie Biao Deng Guo-Hao Du Ya-Nan Fu Han Guo Yan-Ling xue Guan-Yun Peng Fen Tao Ling Zhang Ti-Qiao xiao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

This paper introduces some latest developments regarding the x-ray imaging methodology and applications of the x-ray imaging and biomedical application beamline(BL13W1)at Shanghai Synchrotron Radiation Facility in the past 5 *** photon energy range of the beamline is 8–72.5 *** sets of x-ray imaging detectors with different pixel sizes(0.19–24 lm)are used to realize x-ray microcomputed tomography(x-ray micro-CT)and x-ray in-line phase-contrast *** satisfy the requirements of user experiments,new x-ray imaging methods and image processing techniques are *** vivo dynamic micro-CT experiments with living insects are performed in 0.5 s(sampling rate of 2 Hz,2 tomograms/s)with a monochromatic beam from a wiggler source and in 40 ms(sampling rate of 25 Hz,25 tomograms/s)with a white beam from a bending magnet source.A new x-ray imaging method known as move contrast x-ray imaging is proposed,with which blood flow and moving tissues in raw images can be distinguished according to their moving frequencies in the time ***,x-ray speckle-tracking imaging with twice exposures to eliminate the edge enhancement effect is developed.A high-precision quantification method is realized to measure complex three-dimensional blood vessels obtained via x-ray micro-CT.x-ray imaging methods such as three-dimensional x-ray diffraction microscopy,small-angle x-ray scattering CT,and x-ray fluorescence CT are developed,in which the x-ray micro-CT imaging method is combined with other contrast mechanisms such as diffraction,scattering,and fluorescence contrasts ***,an x-ray nano-CT experiment is performed with a 100 nm spatial *** user experimental results from the fields of material science,biomedicine,paleontology,physics,chemistry,and environmental science obtained on the beamline are provided.

关键词： x-ray imaging x-ray in-line phase-contrast imaging x-ray micro-CT Dynamic micro-CT x-ray speckle-tracking imaging 3DxRD SAxS-CT x-ray fluorescence CT x-ray nano-CT Move contrast x-ray imaging

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Detecting Lumbar Implant and Diagnosing Scoliosis from Vietnamese x-ray imaging Using the Pre-Trained API Models and Transfer Learning

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Computers, Materials & Continua 2021年第1期66卷 17-33页

作者： Chung Le Van Vikram Puri Nguyen Thanh Thao Dac-Nhuong Le Duy Tan University Da Nang550000Vietnam Department of Radiology Hue University of Medicine and PharmacyHue UniversityHue530000Vietnam Institute of Research and Development Duy Tan UniversityDanang550000Vietnam Faculty of Information Technology Duy Tan UniversityDanang550000Vietnam

With the rapid growth of the autonomous system,deep learning has become integral parts to enumerate applications especially in the case of healthcare *** body vertebrae are the longest and complex parts of the human *** are numerous kinds of conditions such as scoliosis,vertebra degeneration,and vertebrate disc spacing that are related to the human body vertebrae or spine or *** detection of these problems is very important otherwise patients will suffer from a disease for a *** this proposed system,we developed an autonomous system that detects lumbar implants and diagnoses scoliosis from the modified Vietnamese x-ray *** applied two different approaches including pre-trained APIs and transfer learning with their pre-trained models due to the unavailability of sufficient x-ray medical *** results show that transfer learning is suitable for the modified Vietnamese x-ray imaging data as compared to the pre-trained API ***,we also explored and analyzed four transfer learning models and two pre-trained API models with our datasets in terms of accuracy,sensitivity,and specificity.

关键词： Lumbar implant diagnosing scoliosis x-ray imaging transfer

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Three-dimensional structured on-chip stacked zone plates for nanoscale x-ray imaging with high efficiency

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Nano Research 2014年第4期7卷 528-535页

作者： Stephan Werner Stefan Rehbein Peter Guttmann Gerd Schneider Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH Institute for Soft Matter and Functional Materials Albert-Einstein-Straβe15 12489 Berlin Germany

Fresnel zone plates are the key optical elements for nanoscale focusing of x-ray beams with high spatial resolution. Conventional zone plates manufactured by planar nanotechnology processes are limited by the achievable aspect ratios of their zone structures. Additionally, ultra-high resolution x-ray optics with high efficiency requires three-dimensional （3-D） shaped tilted zones. The combination of high spatial resolution and high diffraction efficiency is a fundamental problem in x-ray optics. Based on electrodynamical simulations, we find that the optimized zone plate profile for volume diffraction is given by zone structures with radially increasing tilt angles and decreasing zone heights. On-chip stacking permits the realization of such advanced 3-D profiles without significant loss of the maximum theoretical efficiency. We developed triple layer on-chip stacked zone plates with an overlay accuracy of sub-2 nm which fulfills the nanofabrication requirements. Efficiency measurements of on-chip stacked zone plates show significantly increased values compared to conventional zone plates.

关键词： x-ray optics Fresnel zone plates x-ray imaging x-ray microscopy volume diffraction

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An x-ray imaging device based on a GEM detector with delay-line readout

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Chinese Physics C 2010年第1期34卷 78-82页

作者：周意李澄孙勇杰邵明 Department of Modern Physics University of Science and Technology of China

An x-ray imaging device based on a triple-GEM （Gas Electron Multiplier） detector, a fast delay-line circuit with 700 MHz cut-off frequency and two dimensional readout strips with 150 μm width on the top and 250 μm width on the bottom, is designed and tested. The localization information is derived from the propagation time of the induced signals on the readout strips. This device has a good spatial resolution of 150 μm and works stably at an intensity of 105 Hz/mm2 with 8 keV x-rays.

关键词： delay-line readout gas electron multiplier (GEM) x-ray imaging

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x-ray imaging of atomic nuclei

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Science China Materials 2020年第9期63卷 1788-1796页

作者： Jie xu Jia He Yi Ding Jun Luo Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Optically imaging atomic nuclei is a long-sought goal for scientific and applied research,but it has never been realized so *** integrate aberration-corrected scanning transmission electron microscopy(STEM),the bremsstrahlung generation of x-ray photons,and the energy-dispersive x-ray spectroscopic(EDS)receiving and mapping of the photons into a new microscopy method of optical imaging,by which atomic nuclei of different materials are successfully imaged with x-ray ***,this imaging method is shown to be workable with different STEM instruments and be capable of distinguishing atomic nuclei of different elements and resolving imaged size differences of atomic nuclei with the order of magnitude as small as 1 ***,it is a general method that can image atomic nuclei and their evolutions in materials science,chemistry and physics.

关键词： atomic nuclei x-ray imaging bremsstrahlung aberration-corrected scanning transmission electron microscopy

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Studies of an x-ray imaging detector based on THGEM and CCD camera

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Radiation Detection Technology and Methods 2018年第1期2卷 178-185页

作者： Zhi-Yuan Peng Yung-Ting Gu Yu-Guang xie Wen-Qi Yan Hang Zhao Geng-Lan Li Jie-Chen Jiang Huan-Bo Feng Zhi-Gang Wang Jun-Guang Lv Tao Hu Li Zhou Guangxi University Nanning 530004GuangxiChina Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Particle Detection and Electronics Beijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Introduction The photons generated by the electron avalanche in gaseous detectors are known as the secondary scintillation light,of which the spectrum range is from ultraviolet to *** it is possible to collect directly the avalanche-induced photons in visible range by light sensors,such as charged-couple device(CCD).The optical readout is a new method for 2-D imaging of high spatial resolution based on the micro-pattern gaseous detectors(MPGDs).Purpose The traditional charge readout method for the MPGDs is complicated,expensive,and strongly depends on the technology of application-specific integrated *** some cases,for example,low-frame-rate 2-D imaging,the optical readout has more advantages,such as simple,cheap and easy to ***,a gaseous detector was developed based on the thick gaseous electron multiplier(THGEM)and the ordinary scientific CCD camera as readout to realize the x-ray imaging instead of charge *** and materials The THGEMs with 60×60 mm^(2) sensitive area were developed to reach high gain,and the Ar+CF4 gas mixture was chosen for strong light *** so a general scientific CCD can be used for readout and replacing the intensified CCD,which is more expensive than general *** Some clear x-ray images were obtained by this optical readout THGEM detector,and the spatial resolution achieved is 275µ*** is indicated that this kind of detectors have promising imaging capability and great potential for practical application.

关键词： THGEM CCD camera Optical readout CF4 x-ray imaging

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