Near-infrared mechanoluminescence from Sr3Sn2O7:Nd3+ for potential bioimaging and non-destructive detection

Journal of Rare Earths, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Self-recoverable broadband near infrared mechanoluminescence from BaGa12O19:Cr3+ by multi-site occupation strategy

Materials Horizons, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Near infrared mechanoluminescence (NIR-ML) materials have attracted the attention of researchers due to their unique advantages, such as high resistance bright-field interference and higher penetration depth into biological tissues. However, reported NIR-ML are mainly rare-ion-activated narrow-band emitters. In this work, we report a material BaGa12O19:Cr3+ by solid state reaction method. Broad NIR ML (650-1000 nm) is observed at lower force loads (12 N), which based on Cr3+ ion's multi-lattice site occupation. After heat treatment 573 K for 20 min, still maintains 84.4% its intensity. Furthermore, intensity also significantly improved after UV pre-irradiation. Due defective piezoelectric photonic effect, has great self-recoverable properties even in absence sunlight irradiation. Finally, rate reached 66.97% tissues, suggests potential prospects biostress detection towards bio-imaging applications.

Язык: Английский

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Rate-Dependent Mechanoluminescence in SrZn₂S₂O:Mn²⁺ for Time-Characterized Optoelectronic Devices

The Journal of Physical Chemistry C, Год журнала: 2025, Номер 129(9), С. 4715 - 4723

Опубликована: Фев. 26, 2025

Self-recoverable mechanoluminescence (ML) has demonstrated broad applications in mechanosensory optoelectronic devices based on pressure- and rate-dependent emission performance. However, understanding the coupled effect of pressure rate ML kinetics remains elusive, limiting design time-characterized ML-based devices. Here, we show that SrZn2S2O:Mn2+ exhibits an oscillatory behavior with a series sharp peaks time-dependent curve under rapid compression from 0.1 to 11.0 GPa at critical rates ∼1.7–4.7 GPa/s, distinct decompression which presents peaks. The X-ray diffraction measurement shows SrZn2S2O matrix is stable up ∼14.6 above it transforms new structure. Photoluminescence spectroscopy changes monotonically intensity wavelength range 0.1–8.2 GPa. By combining experimental results piezoelectric detrapping model, suggest may result multiple-cyclic processes piezoelectrically induced excitation luminescent activators, indicating intrinsic response compression. be conducive temporal characteristics.

Язык: Английский

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Trap‐Assisted Mechanoluminescence in Mn²⁺‐Doped Transparent Amorphous Glass for Potential Stress Sensing

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Abstract Mechanoluminescence (ML) materials have shown great promise in stress sensing, structural monitoring, information encryption etc., but are primarily based on crystalline material with limited processability, environmental stability, and optical transparency, which seriously hinder their applications. Here, a highly transparent Mn 2+ ‐doped amorphous glass system significant ML properties is designed. A composition modulation strategy proposed to engineer defects within the network structure, ensures more numerous activate of . Under repeated charging–discharging cycles, samples present remarkable repeatability recovery performance, intensity demonstrates zero‐quenching performance after being placed various solutions for 14 days. Combined Raman, EPR spectra, TL experiments, inherent relationship between traps clarified, where oxygen vacancies responsible generation ML. Based ideal high transparency designed glass, application prospects identification detection evaluated. This work provides design principle accelerate development toward versatile photonic

Язык: Английский

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SrAl₂O₄: Eu²⁺, Dy³⁺ mechanoluminescent phosphor for potential bearings stress distribution imaging

Journal of the American Ceramic Society, Год журнала: 2025, Номер unknown

Опубликована: Март 22, 2025

Abstract Mechanoluminescence (ML) materials have shown broad application potentials in stress sensing and structural monitoring due to situ, real‐time monitoring, low trigger threshold. However, the accurate detection of distribution inside machinery still faces certain challenges. Based on a flexible ML film prepared by SrAl 2 O 4 : Eu 2+ , Dy 3+ phosphor polydimethylsiloxane, this paper proposes “stress difference” strategy monitor mechanical structure. By applying different loads recording linear relationship between intensity load, local engine bearing can be measured. comparing difference I PersL specific machine is successfully inferred. This study provides new ideas for sensing, which may open up an innovative method structures.

Язык: Английский

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Intensive Enhancement of Near‐Infrared Emission in ZnAl₂O₄:Fe³⁺ via Li‐Substitution for Application in Identifying Lithium Bearing Ores

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Abstract Owing to the extensive use of lithium compounds in various strategic emerging fields, global demand for minerals has surged recent years. However, existing spectroscopic techniques tend be time‐consuming and inefficient. As a result, there is an urgent need development efficient rapid methods identifying ores. Here, by choosing environment‐friendly Fe 3+ ions as activators ZnAl 2 O 4 (ZAO) spinel oxide host, novel Li + ‐sensitive materials Zn 1‐ x Al :Fe (ZLAO:Fe ) near‐infrared (NIR) phosphors are synthesized. The oxygen vacancy defect levels reduced due occupation interstitial sites , thus prohibiting detrimental electron trapping. Meanwhile, site preference valence state altered doping, resulting more utilization excited electrons octahedral radiative transitions. Notably, optimal ZLAO:Fe ( = 0.4) phosphor presents 53‐fold higher NIR emission intensity than that ZAO:Fe outstanding thermal stability (86%@373 K, 74%@423 K). ceramic plates sensitive additional fabricated their application bearing ores demonstrated. proposed strategy initiates new way design ‐activated multifunctional applications.

Язык: Английский

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Self‐Recovering Multicolor Calcium Phosphate Mechanoluminescent Materials for Wearable Skin and Biomedical Applications

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Abstract Mechanoluminescent (ML) materials are promising for applications in structural health monitoring, biomedicine, stress sensing, and distribution visualization due to their ability emit light without external circuits. However, current ML face challenges, including limited luminescent colors, high raw material costs, toxicity, lack of emissions the invisible spectrum. To overcome these Ca 2 P O 7 (CPO) is selected as matrix its excellent piezoelectric properties, low cost, biocompatibility. CPO doped with various ions (X, X = Ce 3+ , Eu 2+/3+ Tb Dy Mn 2+ Sm ) achieve emission bands CPO:X across a wide range wavelengths UV, blue, green, yellow red. Unlike traditional trap‐controlled materials, does not require UV pre‐irradiation exhibits remarkable self‐recovery properties. First‐principles density functional theory (DFT) calculations confirmed that an ideal self‐recovering materials. Based on several practical devices designed, fencing competition scorekeeper, wearable flexible skin, protective dental crown layer. These innovations offer new directions development application

Язык: Английский

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Self-recoverable and tunable ultra-broadband NIR mechanoluminescence in Cr3+-doped gallogermanate material

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162575 - 162575

Опубликована: Апрель 1, 2025

Язык: Английский

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Flexible Optical Fiber Stress/Temperature Dual‐Mode Sensing Based on CaZnOS:Nd,Er

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract Mechanoluminescence (ML) and upconversion luminescence (UCL) materials exhibit significant potential in advanced optical sensing applications. However, single‐function luminescent often fail to meet the increased complexity precision demands of modern application scenarios. Here, flexible fiber based on ML UCL dual‐mode is demonstrated Ca/SrZnOS: Nd 3+ , Er which can be integrated into stress temperature devices. After 4200 cycles 2 N load, intensity remaines at ≈67% its initial value. Additionally, such device has a sensitivity 1.423% K −1 273.15 K, with detection accuracy 1.1990 °C. The maintained excellent cycling stability over broad range (0–80 °C), as evidenced by unchanged FIR values after 10 cycles. demonstrates applications remote monitoring, particularly high‐temperature, high‐pressure, or hazardous environments, where transmission ensures both safety accuracy.

Язык: Английский

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Self‐Recoverable and NIR‐I to NIR‐II Tunable Broadband Mechanoluminescence of Cr³⁺‐Doped Antimonate Double Perovskites

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 7, 2024

Abstract Mechanoluminescence (ML), which generates an optical response to external mechanical stimuli, shows promise for high‐end stress sensing, flexible optoelectronic skin, dynamic visualization, and anti‐counterfeiting applications. Near‐infrared (NIR) light possesses the advantages of high tissue penetration capability can be absorbed by certain organic molecules, thus NIR‐ML materials have potential applications in biomechanics imaging, nondestructive composition analysis, etc. However, their practical are limited emission wavelengths bandwidths materials. In this study, a series double perovskites A 2 MSbO 6 :Cr 3+ (A = Sr, Ba; M Ga, Sc) is reported with self‐recoverable emissions. By modulating composition, ML coverage tuned from NIR‐I NIR‐II (700 nm over 1200 nm), adjusted full width at half maximum 163 nm. addition, under ultrasonic stimulation, these emitted NIR light, Sr ScSbO penetrating 5 mm beef tissue. This study expands library sources spectral range, thereby promoting new

Язык: Английский

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