Advances in Perovskite Nanocrystals and Nanocomposites for Scintillation Applications

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(3), P. 1261 - 1287

Published: Feb. 28, 2024

In recent years, the field of radiation detection has witnessed a paradigm shift with emergence plastic scintillators incorporating perovskite nanocrystals (PNCs). This innovative class not only capitalizes on superior luminescent properties PNCs but also harnesses flexibility and processability polymers. review explores intricate landscape synthesizing fabricating scintillating nanocomposites, delving into methods employed in their production. From solution-based to solid-state approaches, synthesis for application is explored comprehensively. Furthermore, embedding strategies within polymeric matrices are scrutinized, shedding light various techniques utilized achieve optimal dispersion compatibility. The evaluation final nanocomposites finally discussed, particular emphasis performance hardness. Through meticulous exploration methodologies, techniques, assessments, this Review aims provide multilayered understanding state-of-the-art PNC-based nanoscintillators.

Language: Английский

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Passive Dosimeters for Radiation Dosimetry: Materials, Mechanisms, and Applications

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 1, 2024

Abstract Passive dosimeters enabling accurate measurement of doses from gamma rays to visible light are necessary ensure efficient utilization electromagnetic radiation in numerous fields like medical diagnostics and industrial manufacturing. The specific requirements for terms dosimetry range, sensitivity, accuracy, stability each application have led the development various based on new materials mechanisms. Here, a comprehensive review different types classified according response signal, namely electron paramagnetic resonance, electrical, optical, is provided. This starts with general introduction dosimetry, classification dosimeters, an elucidation necessity ranges spectrum. followed by overview fundamental explanation procedure, dosimetric quantities. Emphasis given working mechanism, design concept, applications type dosimeter as well their respective strengths drawbacks. Challenges prospects presented at end review. provides insightful material‐mechanism‐characteristics‐application relationship that hopefully can serve inspiration devices.

Language: Английский

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Ultrafast and Radiation-Hard Lead Halide Perovskite Nanocomposite Scintillators

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(9), P. 3883 - 3894

Published: Aug. 28, 2023

The use of scintillators for the detection ionizing radiation is a critical aspect in many fields, including medicine, nuclear monitoring, and homeland security. Recently, lead halide perovskite nanocrystals (LHP-NCs) have emerged as promising scintillator materials. However, difficulty affordably upscaling synthesis to multigram level embedding NCs optical-grade nanocomposites without compromising their optical properties still limits widespread use. In addition, fundamental aspects scintillation mechanisms are not fully understood, leaving scientific community suitable fabrication protocols rational guidelines full exploitation potential. this work, we realize large polyacrylate nanocomposite based on CsPbBr3 NCs, which synthesized via novel room temperature, low waste turbo-emulsification approach, followed by situ transformation during mass polymerization process. interaction between polymer chains strengthens structure, homogenizes particle size distribution passivates NC defects, resulting prototypes with luminescence efficiency >90%, exceptional hardness, 4800 ph/MeV yield even at loading, ultrafast response time, over 30% occurring first 80 ps, fast-time applications precision medicine high-energy physics. Ultrafast radioluminescence spectroscopy experiments using pulsed synchrotron light further disambiguate origin kinetics result charged-exciton multiexciton recombination formed under excitation. This highlights role nonradiative Auger decay, whose potential impact fast timing anticipate kinetic model.

Language: Английский

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Organosilicon-Based Ligand Design for High-Performance Perovskite Nanocrystal Films for Color Conversion and X-ray Imaging

ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 10054 - 10062

Published: March 25, 2024

Perovskite nanocrystals (PNCs) bear a huge potential for widespread applications, such as color conversion, X-ray scintillators, and active laser media. However, the poor intrinsic stability high susceptibility to environmental stimuli including moisture oxygen have become bottlenecks of PNC materials commercialization. Appropriate barrier material design can efficiently improve PNCs. Particularly, strategy packaging PNCs in organosilicon matrixes integrate advantages inorganic-oxide-based polymer-based encapsulation routes. inert long-carbon-chain ligands (e.g., oleic acid, oleylamine) used current ligand systems silicon-based are detrimental cross-linking matrix, resulting performance deficiencies nanocrystal films, low transparency large surface roughness. Herein, we propose dual-organosilicon system consisting (3-aminopropyl)triethoxysilane (APTES) with pentanedioic anhydride (APTES-PA), replace improving organosilicon-coated films. As result, strongly fluorescent films prepared by facile solution-casting method demonstrate reduced roughness while maintaining various harsh environments. The optimized were eventually applied an imaging showing spatial resolution above 20 lp/mm. By designing this promising dual our work highlights crucial influence molecular structure capping on optical film.

Language: Английский

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Ultrafast Nanocomposite Scintillators Based on Cd-Enhanced CsPbCl₃ Nanocrystals in Polymer Matrix

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(5), P. 2333 - 2342

Published: April 23, 2024

Lead halide perovskite nanocrystals (LHP-NCs) embedded in polymer matrices are gaining traction as next-generation radiation detectors. While progress has been made on green-emitting CsPbBr3 NCs, scant attention given to the scintillation properties of CsPbCl3 which emit size-tunable UV-blue light matching peak efficiency ultrafast photodetectors. In this study, we explore characteristics NCs produced through a scalable method and treated with CdCl2. Spectroscopic, radiometric, theoretical analyses both untreated uncover deep hole trap states due surface undercoordinated chloride ions, eliminated by Pb Cd substitution. This yields near-perfect resistance polyacrylate mass polymerization. Radiation hardness tests demonstrate stability high γ doses, while time-resolved experiments reveal radioluminescence an average lifetime short 210 ps. These findings enhance our comprehension LHP NCs' properties, positioning promising alternative conventional fast scintillators.

Language: Английский

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Stabilization of halide perovskites with silicon compounds for optoelectronic, catalytic, and bioimaging applications

InfoMat, Journal Year: 2024, Volume and Issue: 6(12)

Published: May 26, 2024

Abstract Silicon belongs to group 14 elements along with carbon, germanium, tin, and lead in the periodic table. Similar silicon is capable of forming a wide range stable compounds, including hydrides, organosilicons, silicic acids, oxides, silicone polymers. These materials have been used extensively optoelectronic devices, sensing, catalysis, biomedical applications. In recent years, compounds also shown be suitable for stabilizing delicate halide perovskite structures. composite are now receiving lot interest their potential use various real‐world Despite exhibiting outstanding performance perovskites susceptible breakdown presence moisture, oxygen, heat, UV light. thought excellent improving both stability perovskite‐based devices. this work, that research applications fields discussed. The interfacial stability, structure–property correlations, application aspects analyzed at molecular level. This study explores developments, difficulties, future directions associated synthesis perovskite‐silicon compounds. image

Language: Английский

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Robust Organogel Scintillator for Self‐healing and Ultra‐flexible X‐ray Imaging

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(13)

Published: Dec. 17, 2023

Metal halide scintillators serve as promising candidates for X-ray detection due to their high attenuation coefficients, light yields, and low-cost solution-processable characteristics. However, the issues of humidity/thermal quenching mechanical fragility, remain obstacles broad diversified development metal scintillators. Here, this work reports a lead-free, water-stable, stretchable, self-healing (ethylenebis-triphenylphosphonium manganese (II) bromide (C

Language: Английский

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Growth of CsPbX3 nanocrystals using sol–gel SiO2 solid powders as reactors without capping agents towards anomalous stable emission membranes

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152638 - 152638

Published: May 28, 2024

Language: Английский

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Photoluminescence Enhancement in Silica‐Confined Ligand‐Free Perovskite Nanocrystals by Suppression of Silanol‐Induced Traps and Phase Impurities

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(19)

Published: Feb. 24, 2024

Abstract The detriments of intrinsic silanol groups in mesoporous silica to the photoluminescence (PL) lead halide perovskite nanocrystals (LHP NCs) confined template have never been determined and clearly elucidated. Here, we disclose that silanol‐induced Cs + Br − deficiencies prompt generation traps CsPb 2 5 impurities. temperature‐dependent PL spectra verify higher energetic barrier trap states CsPbBr 3 NCs silanol‐rich silica. Femtosecond transient absorption reveal trapped state mediates a broadband photoinduced long‐lived decay pathway templates. A remarkable improvement (up 160‐fold) quantum yields is realized by simple elimination. This work demonstrates detrimental effects sites on properties LHP impregnated provides new perspective for ligand‐free synthesis high‐quality templates facile impregnation practical applications.

Language: Английский

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A pH-Sensitive Nanoparticle as Reactive Oxygen Species Amplifier to Regulate Tumor Microenvironment and Potentiate Tumor Radiotherapy

International Journal of Nanomedicine, Journal Year: 2024, Volume and Issue: Volume 19, P. 709 - 725

Published: Jan. 1, 2024

Background: Radiotherapy is a widely used clinical tool for tumor treatment but can cause systemic toxicity if excessive radiation administered. Although numerous nanoparticles have been developed as radiosensitizers to reduce the required dose of X-ray irradiation, they often limitations, such passive reliance on radiation-induced apoptosis in tumors, and little consider unique microenvironment that contributes radiotherapy resistance. Methods: In this study, we characterized novel self-assembled nanoparticle containing dysprosium ion manganese (Dy/Mn-P). We systematically investigated potential Dy/Mn-P (NPs) reactive oxygen species (ROS) amplifier radiosensitizer enhance therapy modulate at cellular level. Additionally, evaluated effect stimulator interferon genes (STING), an innate immune signaling pathway. Results: Physicochemical analysis demonstrated prepared NPs exhibited excellent dispersibility stability, degraded rapidly lower pH values. Furthermore, was internalized by cells selective towards compared normal cells. Our findings also revealed improved significantly increased ROS generation under ionizing radiation, resulting ~70% increase levels alone. This enhanced inhibited ~92% cell clone formation greatly contributed cytoplasmic DNA exposure. Subsequently, activation STING pathway observed, leading secretion pro-inflammatory factors maturation dendritic (DCs). Conclusion: study demonstrates potentiate improving increasing endogenous within tumor. amplify during radiotherapy, thereby triggering anti-tumor response. approach has expand application treatment. Keywords: NPs, ROS, microenvironment,

Language: Английский

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