3D X-ray microscopy with a CsPbBr3 nanowire scintillator  

作　　者：Hanna Dierks Zhaojun Zhang Nils Lamers Jesper Wallentin 

机构地区：[1]Lund University,Synchrotron Radiation Research and NanoLund,Box 118,SE-22100 Lund,Sweden

出　　处：《Nano Research》2023年第1期1084-1089,共6页纳米研究（英文版）

基　　金：This project received funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation program(Grant 801847).

摘　　要：X-ray microscopy is an essential imaging method in many scientific fields,which can be extended to three-dimensional(3D)using tomography.Recently,metal halide perovskite(MHP)nanomaterials have become a promising candidate for X-ray scintillators,due to their high light yield,high spatial resolution,and easy fabrication.Tomography requires many projections and therefore scintillators with excellent stability.This is challenging for MHPs,which often suffer from fast degradation under X-ray irradiation and ambient conditions.Here,we demonstrate that MHP scintillators of CsPbBr3 nanowires(diameter:60 nm,length:5–9μm)grown in anodized aluminum oxide(CsPbBr3 NW/AAO)have sufficient stability for X-ray micro-tomography.A tomogram was taken with a Cu X-ray source over 41 h(dose 4.2 Gyair).During this period the scintillator brightness fluctuated less than 5%,which enabled a successful reconstruction.A long-term study with 2 weeks of continuous X-ray exposure(37.5 Gyair)showed less than 14%fluctuations in brightness and no long-term degradation,despite variations in the ambient relative humidity from 7.4%RH to 34.2%RH.The resolution was stable at(180±20)lp·mm−1,i.e.,about 2.8 micron.This demonstrates that CsPbBr3 NW/AAO scintillators are promising candidates for high resolution X-ray imaging detectors.

关 键 词：TOMOGRAPHY perovskites SCINTILLATORS X-ray imaging micrometer spatial resolution 

分 类 号：TB383[一般工业技术—材料科学与工程]