Hybrid Thermally Activated Nanocluster Fluorophores for X-ray Scintillators DOI
Peng Yuan, Tengyue He, Yang Zhou

et al.

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(12), P. 5088 - 5097

Published: Nov. 9, 2023

Thermally activated delayed fluorescence (TADF) X-ray scintillators have attracted increasing attention because of their theoretical ability to utilize 100% radiation-induced excitons. However, scintillation performance is severely hampered by typically low attenuation efficiencies or mechanochromic properties. Here, we demonstrate hybrid organic–inorganic TADF with remarkably high absorption cross sections based on non-mechanochromic Cu2X2 (X = Cl, Br, I) nanoclusters. The nanoclusters display radioluminescence light yields as 175 000 photons MeV–1, attributable self-absorption and spatially separated HOMO LUMO orbitals. Furthermore, properties, these can be formed into scintillating screens excellent radiation humidity stability via soft-pressing. fabricated a imaging efficiency, benefiting from spatial resolutions (∼30 lp mm–1). This work highlights the promise nanocluster-based in meeting demanding requirements cutting-edge imaging.

Language: Английский

Copper Iodide Inks for High-Resolution X-ray Imaging Screens DOI Creative Commons
Tengyue He, Yang Zhou, Peng Yuan

et al.

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(3), P. 1362 - 1370

Published: Feb. 10, 2023

Copper-based halide scintillators have attracted considerable interest because of their high light yields, low detection limits, toxicity, and moderate fabrication conditions. Here, we synthesized two Cu(I) iodide inks, comprising zero-dimensional Cu4I6(L1)2 nanoparticles (L1 = 1-propyl-1,4-diazabicyclo[2.2.2]octan-1-ium) one-dimensional Cu4I6(L2)2 nanorods (L2 4-dimethylamino-1-ethylpyridinium) for X-ray imaging application. The exhibited broadband green yellow emission with an ultrahigh photoluminescence quantum yield 95.3% 92.2%, respectively. Consequently, the ink-based screens limits 96.4 102.1 nGy s–1, respectively, which are approximately 55 times lower than dose required standard medical diagnosis (5.5 μGy s–1). Importantly, both scintillation extraordinary resolutions exceeding 30 lp mm–1, more double those conventional CsI:Tl Ga2O2S:Tb scintillators. This study provides a new avenue exploring high-resolution on basis Cu-based ink radiography nondestructive detection.

Language: Английский

Citations

61
Near-Unity Energy Transfer from Uranyl to Europium in a Heterobimetallic Organic Framework with Record-Breaking Quantum Yield DOI
Yugang Zhang, Xia Wang, Kexin Xu

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(24), P. 13161 - 13168

Published: June 8, 2023

Lanthanide organic frameworks (Ln-MOFs) have attracted increasing research enthusiasm as photoluminescent materials. However, limited luminescence efficiency stemming from restricted energy transfer the linker to metal center hinders their applications. Herein, a uranyl sensitization approach was proposed boost of Ln-MOFs in distinct heterobimetallic uranyl-europium framework. The record-breaking photoluminescence quantum yield (PLQY, 92.68%) among all reported Eu-MOFs determined benefit nearly 100% between UO22+ and Eu3+. Time-dependent density functional theory ab initio wave-function calculations confirmed overlap excited state levels Eu3+, which is responsible for efficient process. Coupled with intrinsically strong stopping power toward X-ray uranium center, SCU-UEu-2 features an ultralow detection limit 1.243 μGyair/s, outperforming commercial scintillator LYSO (13.257 μGyair/s) satisfying requirement diagnosis (below 5.5 full.

Language: Английский

Citations

61
One-dimensional scintillator film with benign grain boundaries for high-resolution and fast x-ray imaging DOI Creative Commons
Haodi Wu, Qian Wang, Ao Zhang

et al.

Science Advances, Journal Year: 2023, Volume and Issue: 9(30)

Published: July 28, 2023

Fast and high-resolution x-ray imaging demands scintillator films with negligible afterglow, high scintillation yield, minimized cross-talk. However, grain boundaries (GBs) are abundant in polycrystalline film, and, for current inorganic scintillators, detrimental dangling bonds at GBs inevitably extend radioluminescence lifetime increase nonradiative recombination loss, deteriorating afterglow yield. Here, we demonstrate that scintillators one-dimensional (1D) crystal structure, Cs 5 Cu 3 Cl 6 I 2 explored here, possess benign without bonds, yielding nearly identical yield single crystals films. Because of its 1D desired columnar morphology easily obtained via close space sublimation, exhibit (0.1% 10 ms) (1.2 times CsI:Tl). We have also demonstrated fast 27 line pairs mm −1 resolution frame rate up to 33 fps, surpassing most existing scintillators. believe the can greatly boost performance.

Language: Английский

Citations

61
Radioluminescent Cu–Au Metal Nanoclusters: Synthesis and Self-Assembly for Efficient X-ray Scintillation and Imaging DOI
Ren‐Wu Huang, Xin Song, Shulin Chen

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(25), P. 13816 - 13827

Published: June 19, 2023

Zero-dimensional (0D) scintillation materials have drawn tremendous attention due to their inherent advantages in the fabrication of flexible high-energy radiation screens by solution processes. Although considerable progress has been made development 0D scintillators, such as current leading lead-halide perovskite nanocrystals and quantum dots, challenges still persist, including potential issues with self-absorption, air stability, eco-friendliness. Here, we present a strategy overcome those limitations synthesis self-assembly new class scintillators based on metal nanoclusters. We demonstrate gram-scale an atomically precise nanocluster Cu-Au alloy core exhibiting high phosphorescence yield, aggregation-induced emission enhancement (AIEE) behavior, intense radioluminescence. By controlling solvent interactions, AIEE-active nanoclusters were self-assembled into submicron spherical superparticles solution, which exploited novel building block for particle-deposited films high-resolution X-ray imaging performance. This work reveals superstructures promising practical applications detection imaging.

Language: Английский

Citations

52
Efficient and ultrafast organic scintillators by hot exciton manipulation DOI

Xinyuan Du,

Shan Zhao, Lu Wang

et al.

Nature Photonics, Journal Year: 2024, Volume and Issue: 18(2), P. 162 - 169

Published: Jan. 11, 2024

Language: Английский

Citations

51
Stimulus-Responsive Organic Phosphorescence Materials Based on Small Molecular Host–Guest Doped Systems DOI
Yunxiang Lei, Wenbo Dai,

Gengchen Li

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(7), P. 1794 - 1807

Published: Feb. 10, 2023

Small molecular host–guest doped materials exhibit superiority toward high-efficiency room-temperature phosphorescence (RTP) due to their structural design diversity and ease of preparation. Dynamic RTP display excellent characteristics, such as good reversibility, quick response, tunable luminescence ability, making them applicable various cutting-edge technologies. Herein, we summarize the advances in dynamic that respond external internal stimuli present some insights into strategies underlying mechanisms. Subsequently, specific viewpoints are described regarding this promising field for development materials. This Perspective is highly beneficial future intelligent applications systems.

Language: Английский

Citations

49
Highly Efficient Stable Luminescent Radical-Based X-ray Scintillator DOI

Jia‐Wang Yuan,

Qiuchen Peng,

Jia-Cong Fu

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(49), P. 27095 - 27102

Published: Nov. 28, 2023

Stable luminescent radicals are open-shell emitters with unique doublet emission characteristics. This feature makes stable exhibit widespread application prospects in constructing optical, electrical, and magnetic materials. In this work, a radical-based X-ray scintillator of AuPP-1.0 was prepared, which exhibited high excited luminescence (XEL) efficiency as well excellent stability. A mechanism study showed that the heavy atom Au endowed it effective absorption X-rays, characteristics significantly increased its exciton utilization rate radioluminescence process. Moreover, has good processability to fabricate flexible screen for high-quality imaging, whose resolution can reach 20 LP mm-1. work demonstrates is beneficial improving radioluminescence, providing brand-new strategy construction high-performance scintillators.

Language: Английский

Citations

44
Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging DOI Creative Commons
Lei Lei,

Minghao Yi,

Yubin Wang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 7, 2024

Lanthanide-doped fluoride nanoparticles (NPs) showcase adjustable X-ray-excited persistent luminescence (XEPL), holding significant promise for applications in three-dimensional (3D) imaging through the creation of flexible X-ray detectors. However, a dangerous high irradiation dose rate and complicated heating procedure are required to generate efficient XEPL high-resolution 3D imaging, which is attributed lack strategies significantly enhance intensity. Here we report that intensity series lanthanide activators (Dy, Pr, Er, Tm, Gd, Tb) greatly improved by constructing dual heterogeneous interfaces double-shell nanostructure. Mechanistic studies indicate employed core@shell@shell structure could not only passivate surface quenchers lower non-radiative relaxation possibility, but also reduce interfacial Frenkel defect formation energy leading increase trap concentration. By employing NPs containing film as scintillation screen, inside electrical watch was clearly achieved based on delayed reconstruction procedure. We foresee these findings will promote development advanced activated offer opportunities safer more techniques number scientific practical areas.

Language: Английский

Citations

39
Water-dispersible X-ray scintillators enabling coating and blending with polymer materials for multiple applications DOI Creative Commons
Hailei Zhang, Bo Zhang,

Chongyang Cai

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 6, 2024

Abstract Developing X-ray scintillators that are water-dispersible, compatible with polymeric matrices, and processable to flexible substrates is an important challenge. Herein, Tb 3+ -doped Na 5 Lu 9 F 32 introduced as scintillating material steady-state light yields of 15,800 photons MeV −1 , which generated nanocrystals on halloysite nanotubes. The obtained product exhibits good water-dispersibility highly sensitive luminescence X-rays. It deposited onto a polyurethane foam afford composite dose-dependent radioluminescence. Moreover, the dispersed into polymer matrixes in aqueous solution prepare rigid or scintillator screen for imaging. As third example, it incorporated multilayer hydrogels information camouflage multilevel encryption. Encrypted can be recognized only by irradiation, while false read out under UV light. Altogether, we demonstrate water-dispersible promising processing radioluminescent, imaging, encrypting materials.

Language: Английский

Citations

23
Dynamic Reversible Full‐Color Piezochromic Fluorogens Featuring Through‐Space Charge‐Transfer Thermally Activated Delayed Fluorescence and their Application as X‐Ray Imaging Scintillators DOI
Wei Yang,

Chenlong Xie,

Tianhao Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 28, 2024

Abstract Thermally activated delayed fluorescence (TADF) emitters featuring through‐space charge transfer (TSCT) can be excellent candidates for piezochromic luminescent (PCL) materials due to their structural dynamics. Spatial donor‐acceptor (D−A) stacking arrangements enable the modulation of inter‐ and intramolecular D−A interactions, as well spatial states, under varying pressure conditions. Herein, we demonstrate an effective approach toward dynamic reversible full‐color PCL with TSCT‐TADF characteristics. Their single crystals exhibit a full‐color‐gamut process spanning range 170 nm. Moreover, TSCT‐TADF‐PCL display unity photoluminescence quantum yield, show promising application in X‐ray scintillator imaging.

Language: Английский

Citations

22