Organic photoelectric materials for X-ray and gamma ray detection: mechanism, material preparation and application

Chen, Mingxi; Wang, Cong; Hu, Wenping

doi:10.1039/d1tc00525a

Cited by 38 publications

(25 citation statements)

References 136 publications

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“…These excitons then transferred to the lowest singlet S 1 after nonradiative transition, such as vibration relaxation, and finally transited back to the ground state S 0 . The excess energy in the recombination of the electrons and holes was released in the form of visible light. , As shown in Figure S5, the aromatic hydrocarbon anthracene was commonly treated as the arch type of molecular crystals, in which the distance between the H atom and the center of anthracene was 2.750 Å. Therefore, a large number of intermolecular C–H···π interactions between adjacent anthracene molecules restricted the free rotation of the phenyl rings, blocked nonradiative channels, prevented the quenching of fluorescence, and hence kept the strong radioluminescence and the high conversion efficiency of the anthracene crystals. , …”

Section: Resultsmentioning

confidence: 99%

Anthracene Single-Crystal Scintillators for Computer Tomography Scanning

Chen

Sun

Hong

et al. 2022

ACS Appl. Mater. Interfaces

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X-ray imaging and computed tomography (CT) technology, as the important non-destructive measurements, can observe internal structures without destroying the detected sample, which are always used in biological diagnosis to detect tumors, pathologies, and bone damages. It is always a challenge to find materials with a low detection limit, a short exposure time, and high resolution to reduce X-ray damage and acquire high-contrast images. Here, we described a low-cost and high-efficient method to prepare centimeter-sized anthracene crystals, which exhibited intense X-ray radioluminescence with a detection limit of ∼0.108 μGy s–1, which is only one-fifth of the dose typically used for X-ray diagnostics. Additionally, the low absorption reduced the damage in radiation and ensured superior cycle performance. X-ray detectors based on anthracene crystals also exhibited an extremely high resolution of 40 lp mm–1. The CT scanning and reconstruction of a foam sample were then achieved, and the detailed internal structure could be clearly observed. These indicated that organic crystals are expecting to be leading candidate low-cost materials for low-dose and highly sensitive X-ray detection and CT scanning.

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Section: Resultsmentioning

confidence: 99%

Anthracene Single-Crystal Scintillators for Computer Tomography Scanning

Chen

Sun

Hong

et al. 2022

ACS Appl. Mater. Interfaces

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“…Electrochemical microneedles are frequently applied to medical detection due to their good sensitivity. However, due to the limitations of the preparation process and materials [ 31 ], they are unable to be applied in the market on a large scale. Familiar microneedle preparation technologies include 3D printing technology, magnetic resonance (MR) stretch lithography technology, and two-step soft lithography technology.…”

Section: Preparation Of Microneedles and Microneedle Electrodesmentioning

confidence: 99%

Electrochemical Microneedles: Innovative Instruments in Health Care

2022

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As a significant part of drug therapy, the mode of drug transport has attracted worldwide attention. Efficient drug delivery methods not only markedly improve the drug absorption rate, but also reduce the risk of infection. Recently, microneedles have combined the advantages of subcutaneous injection administration and transdermal patch administration, which is not only painless, but also has high drug absorption efficiency. In addition, microneedle-based electrochemical sensors have unique capabilities for continuous health state monitoring, playing a crucial role in the real-time monitoring of various patient physiological indicators. Therefore, they are commonly applied in both laboratories and hospitals. There are a variety of reports regarding electrochemical microneedles; however, the comprehensive introduction of new electrochemical microneedles is still rare. Herein, significant work on electrochemical microneedles over the past two years is summarized, and the main challenges faced by electrochemical microneedles and future development directions are proposed.

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“…2−5 However, exposure to radiation with highenergy photons brings damage to cellular DNA, which would lead to cancer, genetic defects, or other serious diseases. 6,7 Facing the concern of the damage from radioactive contamination to human health and the ambient environment, monitoring the photons of X-rays is currently a hot and meaningful topic of research. Scintillators, converting X-ray energy into visible photons, 8−10 such as a CsI:Tl single crystal 11,12 and Bi 4 Ge 3 O 12 (BGO) 13 have the advantages of high light yield, good radiation hardness, and excellent energy resolution.…”

Section: ■ Introductionmentioning

confidence: 99%

“…An X-ray, a type of electromagnetic radiation with a short wavelength range (0.01–10 nm), has the characteristics of high energy, strong penetrability and ionization effect, etc . Due to the properties of X-rays, they are widely used in scientific research, medical diagnosis, baggage security, and industrial flaw detection. − However, exposure to radiation with high-energy photons brings damage to cellular DNA, which would lead to cancer, genetic defects, or other serious diseases. , Facing the concern of the damage from radioactive contamination to human health and the ambient environment, monitoring the photons of X-rays is currently a hot and meaningful topic of research. Scintillators, converting X-ray energy into visible photons, − such as a CsI:Tl single crystal , and Bi 4 Ge 3 O 12 (BGO) have the advantages of high light yield, good radiation hardness, and excellent energy resolution.…”

Section: Introductionmentioning

confidence: 99%

Visualization of X-rays with an Ultralow Detection Limit via Zero-Dimensional Perovskite Scintillators

Yao

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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X-rays play an extremely significant role in medical diagnosis, safety testing, scientific research, and other practical applications. However, as the main sources of radioactive pollution, the hazard of X-rays to human health and the environment has been a major concern. Herein, the explored perovskite scintillator of Cs 2 Zr 1−x Pb x Cl 6 in this work exhibits an ultrahigh radioluminescence intensity owing to the enhanced X-ray absorption for the introduction of Pb 2+ ions. The Cs 2 Zr 1−x Pb x Cl 6 crystals are demonstrated as efficient scintillators with a self-trapped exciton emission and extremely high steady-state light yield (∼101,944 photons meV −1 ). This fascinating scintillator provides a convenient visual tool for X-ray detection even for an indoor lighting environment, reaching a low detection limit of ∼14.2 nGy•s −1 , which is about 1/387 of the typical medical imaging dose (5.5 μGy• s −1 ). Moreover, X-ray imaging with a high resolution of 16.6 lp•mm −1 is achieved with the as-explored Cs 2 Zr 1−x Pb x Cl 6 scintillator film. Herein, the Cs 2 Zr 1−x Pb x Cl 6 scintillator provides a feasible strategy for X-ray monitoring in the field of biomedicine, high-energy physics, national security, and other applications.

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Organic photoelectric materials for X-ray and gamma ray detection: mechanism, material preparation and application

Abstract: In recent years, with the increasing demands of high-energy physics, medical diagnosis, radiochemistry, industrial non-destructive testing, ionizing radiation detectors have received more and more attention. Organic photoelectric materials have been...

Cited by 38 publications

References 136 publications

Anthracene Single-Crystal Scintillators for Computer Tomography Scanning

Anthracene Single-Crystal Scintillators for Computer Tomography Scanning

Electrochemical Microneedles: Innovative Instruments in Health Care

Visualization of X-rays with an Ultralow Detection Limit via Zero-Dimensional Perovskite Scintillators

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