Organic–Inorganic Hybrid Glasses of Atomically Precise Nanoclusters

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(11), С. 7373 - 7385

Опубликована: Март 4, 2024

Organic–inorganic atomically precise nanoclusters provide indispensable building blocks for establishing structure–property links in hybrid condensed matter. However, robust glasses of ligand-protected nanocluster solids have yet to be demonstrated. Herein, we show [Cu4I4(PR3)4] cubane coordinated by phosphine ligands (PR3) form melt-quenched air with reversible crystal–liquid–glass transitions. Protective critically influence the glass formation mechanism, modulating glasses' physical properties. A utilizing ethyldiphenylphosphine-based nanoclusters, [Cu4I4(PPh2Et)4], exhibits superb optical properties, including >90% transmission both visible and near-infrared wavelengths, negligible self-absorption, near-unity quantum yield, high light yield. Experimental theoretical analyses demonstrate structural integrity [Cu4I4(PPh2Et)4] nanocluster, i.e., iodine-bridged tetranuclear cubane, has been fully preserved state. The strong internanocluster CH−π interactions found subsequently reduced vibration account its enhanced luminescence Moreover, this highly transparent enables performant X-ray imaging low-loss waveguiding fibers drawn above transition. discovery "nanocluster glass" opens avenues unraveling mechanisms designing novel luminescent well-defined advanced photonics.

Язык: Английский

---

Arising 2D Perovskites for Ionizing Radiation Detection

Advanced Materials, Год журнала: 2024, Номер 36(26)

Опубликована: Апрель 5, 2024

2D perovskites have greatly improved moisture stability owing to the large organic cations embedded in inorganic octahedral structure, which also suppresses ions migration and reduces dark current. The suppression of by effectively excessive device noise baseline drift shows excellent potential direct X-ray detection field. In addition, gradually emerged with many unique properties, such as anisotropy, tunable bandgap, high photoluminescence quantum yield, wide range exciton binding energy, continuously promote development ionizing radiation detection. This review aims systematically summarize advances progress halide perovskite semiconductor scintillator detectors, including reported alpha (α) particle, beta (β) neutron, X-ray, gamma (γ) ray structural features their advantages are discussed. Development directions proposed overcome limitations detectors.

Язык: Английский

---

A Thermo‐Responsive MOFs for X‐Ray Scintillator

Advanced Materials, Год журнала: 2024, Номер 36(32)

Опубликована: Июнь 12, 2024

Abstract Thermo‐responsive smart materials have aroused extensive interest due to the particular significance of temperature sensing. Although various photoluminescent are explored in thermal detection, it is not applicable enough X‐ray radiation environment where accuracy and reliability will be influenced. Here, a strategy proposed by introducing concept radio‐luminescent functional building units (RBUs) construct thermo‐responsive lanthanide metal‐organic frameworks (Ln‐MOFs) scintillators for self‐calibrating thermometry. The rational designs RBUs (including organic ligand Tb 3+ /Eu ) with appropriate energy levels lead high‐performance radio‐luminescence. Ln‐MOFs exhibit perfect linear response X‐ray, presenting low dose rate detection limit (min ≈156.1 nGy air s ‐1 ). Self‐calibrating based on ratiometric XEL intensities achieved good absolute relative sensitivities 6.74 8.1%K , respectively. High light yield (max ≈39000 photons MeV −1 ), imaging spatial resolution ≈18 lp mm irradiation stability (intensity ≈100% at 368 K total up 215 Gy giant color transformation visualization benefit applications, especially situ imaging. Such provides promising way develop novel photonic excellent scintillator performances.

Язык: Английский

---

Capillary Manganese Halide Needle‐Like Array Scintillator with Isolated Light Crosstalk for Micro‐X‐Ray Imaging

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 10, 2024

Abstract The exacerbation of inherent light scattering with increasing scintillator thickness poses a major challenge for balancing the thickness‐dependent spatial resolution and scintillation brightness in X‐ray imaging scintillators. Herein, thick pixelated needle‐like array capable micrometer is fabricated via waveguide structure engineering. Specifically, this involves integrating straightforward low‐temperature melting process manganese halide an aluminum‐clad capillary template. In structure, oriented photons propagate along well‐aligned are confined within individual pixels by aluminum reflective cladding, as substantiated from comprehensive analysis including laser diffraction experiments. Consequently, thanks to isolated light‐crosstalk channels robust output due increased thickness, ultrahigh resolutions 60.8 51.7 lp mm −1 at modulation transfer function (MTF) 0.2 achieved on 0.5 even 1 scintillators, respectively, which both exceed pore diameter arrays’ template ( Φ = 10 µm). As far it known, these among highest reported metal scintillators never demonstrated such Here avenue presented demand high‐resolution across diverse scientific practical fields.

Язык: Английский

---

Ce3+-doped oxyfluoride glass scintillator: optimized radioluminescence and application in X-ray imaging

Journal of Alloys and Compounds, Год журнала: 2024, Номер 980, С. 173670 - 173670

Опубликована: Янв. 26, 2024

Язык: Английский

---

Anchoring group regulation of bridging molecules enables brightly luminescent and ultra-stable Cs2ZrCl6@SiO2 scintillator for high-resolution X-ray imaging

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

---

High‐Confidentiality X‐Ray Imaging Encryption Using Prolonged Imperceptible Radioluminescence Memory Scintillators

Advanced Materials, Год журнала: 2023, Номер 35(52)

Опубликована: Ноя. 11, 2023

X-ray imaging plays an increasingly crucial role in clinical radiography, industrial inspection, and military applications. However, current technologies have difficulty protecting against information leakage caused by brute force attacks via trial-and-error. Here high-confidentiality encryption fabricating ultralong radioluminescence memory films composed of lanthanide-activated nanoscintillators (NaLuF4 : Gd3+ or Ce3+ ) with imperceptible purely-ultraviolet (UV) emission is reported. Mechanistic investigations unveil that attributed to the long-lived trapping thermalized charge carriers within Frenkel defect states subsequent slow release form radioluminescence. The encrypted can be securely stored film for more than 7 days optically decoded perovskite nanocrystal. Importantly, this strategy protect trial-and-error through perception lifetime change persistent It further demonstrated as-fabricated flexible enables achieving 3D curved objects a high spatial resolution 20 lp/mm excellent recyclability. This study provides valuable insights into fundamental understanding X-ray-to-UV conversion nanocrystal lattices opens up new avenue toward development high-confidential technologies.

Язык: Английский

---

Anchoring the AIEgen by Zr clusters in metal-organic gel for efficient X-ray detection and imaging

Chem, Год журнала: 2024, Номер 10(4), С. 1268 - 1278

Опубликована: Фев. 21, 2024

Язык: Английский

---

Low‐Dimensional Metal Halide for High Performance Scintillators

Advanced Functional Materials, Год журнала: 2024, Номер 34(38)

Опубликована: Апрель 25, 2024

Abstract Inorganic scintillators play a pivotal role in diverse fields like medical imaging, nondestructive detection, homeland security, and high‐energy physics. However, traditional inorganic encounter challenges such as high fabrication costs low light yield. Recently, low‐dimensional metal halide (LDMHS) have witnessed rapid progress, owing to their distinctive crystal structure superior radioluminescence performance. Herein, an overview of recent advancements proposed instructive pathways for achieving high‐performance LDMHS is provided. First, the scintillation physical mechanism emphasis on essential requirements applications are elucidated. Furthermore, classified according B‐site cations, respective characteristics introduced. This encompasses understanding structure‐property relationships routes rules optimizing Finally, persisting this burgeoning field potential research directions future exploration discussed.

Язык: Английский

---

Designer bright and fast CsPbBr3 perovskite nanocrystal scintillators for high-speed X-ray imaging

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Окт. 14, 2024

Bright and fast scintillators are highly crucial for high-speed X-ray imaging in the medical diagnostic radiology including angiography cardiac computed tomography. The CsPbBr

Язык: Английский

---