Finely manipulating room temperature phosphorescence by dynamic lanthanide coordination toward multi-level information security

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

Published: May 8, 2024

Abstract Room temperature phosphorescence materials have garnered significant attention due to their unique optical properties and promising applications. However, it remains a great challenge finely manipulate phosphorescent achieve desirable performance on demand. Here, we show feasible strategy organic by introducing dynamic lanthanide coordination. The phosphors of terpyridine phenylboronic acids possessing excellent coordination ability are covalently embedded into polyvinyl alcohol matrix, leading ultralong room with lifetime up 0.629 s. Notably, such performance, including intensity lifetime, can be well controlled varying the dopant. Relying modulable these lanthanide-manipulated films, multi-level information encryption attacker-misleading spatial-time-resolved applications is successfully demonstrated greatly improved security level. This work opens an avenue for manipulating meet versatile uses in

Language: Английский

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A Thermo‐Responsive MOFs for X‐Ray Scintillator

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: June 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.

Language: Английский

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Study on a Highly Thermostable Dy³⁺-Activated Borophosphate Phosphor

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(14), P. 6483 - 6492

Published: March 26, 2024

Constructing a phosphor with multifunctional applications is an imperative challenge. Especially, highly thermostable luminescence of indispensable for stable white-light-emitting diodes (LEDs). Nevertheless, good thermal quenching resistance behavior unfavorable fluorescence intensity ratio (FIR)-based optical temperature sensor. Herein, Ba3(ZnB5O10)PO4 (BZBP)-based successfully achieved via replacing Ba2+ Dy3+, demonstrating simultaneously promising lighting and thermometry utilizations. Under the excitation 350 nm, title only loses 12% initial when up to 473 K, ensuring sufficient thermostability white-LED lighting. The device fabricated using emits high-quality white light high color rendering index (Ra = 93) low correlated (CCT 3996 K). Meanwhile, yellow blue emission intensities demonstrate downtrend difference rising temperature. Temperature sensing properties are assessed through FIR technology. maximal relative sensitivity reaches as 0.0379 K–1 at 298 K. These results reveal that has great potential indoor applications.

Language: Английский

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Ratiometric Fluorescence Optical Fiber Enabling Operando Temperature Monitoring in Pouch‐Type Battery

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 14, 2024

Abstract Thermal characteristics are essential for improving the performance and monitoring status of Li‐ion batteries (LIBs). However, it is a challenge to design efficient facile sensing materials detection in situ temperature working LIB. Herein, ratiometric fluorescence optical fiber developed real‐time performed with measurement accuracy 0.12 °C, feasibility based on this polymer composed NaLaTi 2 O 6 :Yb/Er phosphors verified pouch‐type battery. During charging discharging cycles, instantaneously conveyed, revealing internal situation LIBs. This article further dwells thermal constant current (CC)/constant voltage CC processes at different C‐rates battery failure when operated low temperatures (0 °C). work demonstrates an innovative strategy operando solitary conducted by fiber.

Language: Английский

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Europium(III) coordination chemistry: structure, spectra and hypersensitivity

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 517, P. 215927 - 215927

Published: June 27, 2024

Language: Английский

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Novel GdAlGe2O7:Bi3+,Eu3+ phosphors with anti-thermal quenching properties for high sensitivity optical temperature measurement

Materials Today Physics, Journal Year: 2024, Volume and Issue: 43, P. 101391 - 101391

Published: March 6, 2024

Language: Английский

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Dy3+,Mn4+ co-doped phosphors for synergistic luminescent dual-mode thermometer and high-resolution imaging

Materials & Design, Journal Year: 2024, Volume and Issue: 241, P. 112906 - 112906

Published: April 1, 2024

Fluorescent temperature measurement has become a research hotspot due to its characteristics of non-contact, miniaturization, and fast response. However, it remains key challenge realize excellent sensitivity high resolution. Herein, series La2MgTiO6:Dy3+,Mn4+ phosphors are developed the related energy transfer between Dy3+→Mn4+ is discovered. The coupling distance Mn4+ adjacent ligands greatly affected by temperature. differences emission levels lower Dy3+ hinder multi-phonon relaxation process, which moderates thermal quenching rate Dy3+. Therefore, highly sensitive FIR thermometers built according significant discrimination dependence Mn4+. maximum Sa Sr reach 0.022 K−1(@563 K) 2.622 %K−1(@544 K). In contrast, thermometer based on lifetime fabricated, extremely Interestingly, can effectively promote Mn4+, then improve sensitivity. enhanced from 1.621 %K−1(@503 2.305 %K−1 (@480 resolution dual-mode fluorescence thermometry have exceeded most current optical materials. Besides, thermochromic properties presented designed be combined with PDMS films qualitatively evaluate ambient

Language: Английский

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Pushing Trap‐Controlled Persistent Luminescence Materials toward Multi‐Responsive Smart Platforms: Recent Advances, Mechanism, and Frontier Applications

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(37)

Published: July 14, 2024

Abstract Smart stimuli‐responsive persistent luminescence materials, combining the various advantages and frontier applications prospects, have gained booming progress in recent years. The trap‐controlled property energy storage capability to respond external multi‐stimulations through diverse pathways make them attractive emerging multi‐responsive smart platforms. This review aims at advances materials for advanced multi‐stimuli‐responsive design principles, mechanisms, representative stimulations, i.e., thermo‐, photo‐, mechano‐, X‐rays responsiveness, are comprehensively summarized. Various hybrid systems containing highlighted. Specifically, temperature dependent trapping de‐trapping performance is discussed, from extreme‐low ultra‐high conditions. Emerging future perspectives briefly presented. It hoped that this would provide new insights guidelines rational manipulation of

Language: Английский

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Erbium‐Induced Boost in Self‐Trapped Exciton Emission of Double Perovskites for Highly Sensitive Multimodal and Multiplexed Optical Thermography

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

Published: April 16, 2024

Abstract Self‐trapped excitons (STEs) of lead‐free perovskites have aroused tremendous interest in remote optical thermometry due to strong exciton–phonon coupling and large Stokes shifts. Herein, a bright multimodal multiplexed thermometer is constructed with high sensitivity ( S r ) self‐calibrating ability based on Cs 2 NaInCl 6 :Er 3+ double perovskite, allowing for fast simplified reading via mobile devices. Intriguingly, Er doping not only shows the characteristic green emissions but also introduces nanoelectronic domains through new localized valance band maximum breaks symmetry In site, which facilitates generation more STEs. The temperature‐sensitive blue emission STEs temperature‐insensitive endow including time‐resolved ratiometric readout schemes 3.8% K −1 , where an upconversion primary serves as reference calibrate other modes. Meanwhile, designed thermometers show robust photostability, repeatability, structural stability long‐time working storage. addition, remarkable thermochromic phenomenon from enables quick color‐multiplexed thermography smartphone, utilized capture real‐time 2D thermal imaging microelectronic This work demonstrates great potential perovskite low‐cost portable thermometry.

Language: Английский

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Smart Electronic Device-Based Monitoring of SAR and Temperature Variations in Indoor Human Tissue Interaction

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(5), P. 2439 - 2439

Published: Feb. 25, 2025

The daily use of devices generating electric and magnetic fields has led to potential human overexposure in home work environments. This paper assesses the possible effects on health at low high frequencies. It presents an electronic monitoring device that captures incidence specific absorption rate (SAR) temperature variation (∆T) body. system transmits data a cloud platform, where feedforward neural network (FFNN) processes received information. SAR surface values are detected indoor environment, stationary moving subjects. results effectively assess distribution due electromagnetic fields. prototype peaks when subjects remained motionless. Predictive analysis confirms need for workplaces with materials shielding external signals attenuating internal sources. Moderate mobile phone could lower values.

Language: Английский

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