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3D X-ray microscopy with a CsPbBr3 nanowire scintillator

Dierks, Hanna LU ; Zhang, Zhaojun LU ; Lamers, Nils LU and Wallentin, Jesper LU (2023) In Nano Research 16(1). p.1084-1089
Abstract

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: 5–9 µm) grown in anodized aluminum oxide (CsPbBr3 NW/AAO) have sufficient stability for... (More)

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: 5–9 µm) 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) 1pmm−1, i.e., about 2.8 micron. This demonstrates that CsPbBr3 NW/AAO scintillators are promising candidates for high resolution X-ray imaging detectors.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
micrometer spatial resolution, perovskites, scintillators, tomography, X-ray imaging
in
Nano Research
volume
16
issue
1
pages
6 pages
publisher
Springer
external identifiers
  • scopus:85134772801
ISSN
1998-0124
DOI
10.1007/s12274-022-4633-7
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2022, The author(s).
id
02ef0af2-b77e-44b0-9db4-aae4435249db
date added to LUP
2022-08-04 13:32:06
date last changed
2023-11-21 01:51:46
@article{02ef0af2-b77e-44b0-9db4-aae4435249db,
  abstract     = {{<p>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 CsPbBr<sub>3</sub> nanowires (diameter: 60 nm, length: 5–9 µm) grown in anodized aluminum oxide (CsPbBr<sub>3</sub> 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 Gy<sub>air</sub>). 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 Gy<sub>air</sub>) 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) 1pmm<sup>−1</sup>, i.e., about 2.8 micron. This demonstrates that CsPbBr<sub>3</sub> NW/AAO scintillators are promising candidates for high resolution X-ray imaging detectors.</p>}},
  author       = {{Dierks, Hanna and Zhang, Zhaojun and Lamers, Nils and Wallentin, Jesper}},
  issn         = {{1998-0124}},
  keywords     = {{micrometer spatial resolution; perovskites; scintillators; tomography; X-ray imaging}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{1084--1089}},
  publisher    = {{Springer}},
  series       = {{Nano Research}},
  title        = {{3D X-ray microscopy with a CsPbBr<sub>3</sub> nanowire scintillator}},
  url          = {{http://dx.doi.org/10.1007/s12274-022-4633-7}},
  doi          = {{10.1007/s12274-022-4633-7}},
  volume       = {{16}},
  year         = {{2023}},
}