Multiple Defect‐Induced High‐Resolution Near‐Infrared Mechanoluminescent Materials for Non‐Destructive Detection of Blood Glucose and Lipids

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(50)

Published: Nov. 6, 2024

Mechanoluminescence (ML) materials, known for their ability to convert mechanical energy into light, are increasingly recognized potential applications, such as in intelligent stress sensing, vivo bioimaging, and non-destructive monitoring. However, the low signal-to-noise ratio (SNR) narrow-band emission of single-defect-induced ML materials usually limit biological-related practical applications. Here, these limitations will be addressed by modulating microstructure evolution Y

Language: Английский

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Realizing Near Infrared Mechanoluminescence Switch in LAGO:Cr Based on Oxygen Vacancy

Small, Journal Year: 2024, Volume and Issue: 20(31)

Published: March 7, 2024

Abstract Mechanoluminescence (ML) materials are featured with the characteristic of “force to light” in response external stimuli, which have made great progress artificial intelligence and optical sensing. However, how effectively enable ML material is a daunting challenge. Here, Lu 3 Al 2 Ga O 12 :Cr 3+ (LAGO: Cr ) near infrared (NIR) peaked at 706 nm reported, successfully realizes key unlock by lattice‐engineering strategy substitution for “grow” oxygen vacancy (O v defects. Combined thermoluminescence measurements, observed due formation defect levels intensity proportional it. It confirmed X‐ray photoelectron spectroscopy electron paramagnetic resonance that such process dominated , plays crucial role turning on this compound. In addition, potential emissions from 4 T E level transitions discussed both experimental theoretical aspects. This study reveals mechanism change behavior after cation substitution, it may important implications practical application defect‐regulated turn‐on ML.

Language: Английский

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Visible-to-Near-Infrared Mechanoluminescence in Bi-Activated Spinel Compounds for Multiple Information Anticounterfeiting

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(27), P. 35279 - 35292

Published: June 27, 2024

Mechanoluminescence (ML) is the nonthermal luminescence generated in process of force-to-light conversion, which has broad prospects stress sensing, wearable devices, biomechanics, and multiple information anticounterfeiting. Multivalence emitter ions utilize their own self-reduction to realize multiband ML without introducing another dopant, such as Eu3+/Eu2+, Sm3+/Sm2+, Mn4+/Mn2+. However, self-reduction-induced bismuth-activated materials rarely been reported so far. In this work, a novel visible-to-near-infrared (vis-NIR) induced by Bi3+ Bi2+ spinel-type compound (MgGa2O4) reported. The photoluminescence (PL) spectra, PL excitation (PLE) lifetime curves demonstrate that Bi3+/Bi2+ are main centers. Notably, possible model proposed, where magnesium vacancy (VMg″) considered driving force for Bi2+. Furthermore, an oxygen (VO••) confirmed electron paramagnetic resonance (EPR) spectroscopy. Combined with thermoluminescence (TL) glow plausible trap-controlled mechanism illustrated, electron-hole (VO••/VMg″) pairs play significant role capturing electrons holes. It worth noting proof-of-concept dual-mode electronic signature application implemented based on flexible film, improves capabilities anticounterfeiting high-level security applications. Besides, multistimulus-responsive behaviors film realized under 254 nm UV lamp, thermal disturbance, 980 laser, mechanical stimuli. general, study provides new insights into designing vis-NIR toward wider possibilities.

Language: Английский

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Near‐Infrared Mechanoluminescence from Cr³⁺‐Doped Spinel Nanoparticles for Potential Oral Diseases Detection

Small, Journal Year: 2024, Volume and Issue: 20(45)

Published: Aug. 10, 2024

Mechanoluminescence (ML) phosphors have found various promising utilizations such as in non-destructive stress sensing, anti-counterfeiting, and bio imaging. However, the reported NIR MLs predominantly been limited to bulky particle size weak ML intensity, hindering further practical applications. For this regard, a nano-sized ZnGa

Language: Английский

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Bi³⁺/Eu³⁺ Co‐Activated Multimode Anti‐Counterfeiting Material with White Light Emission and Orange‐Yellow Persistent Luminescence

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(11)

Published: July 5, 2024

Abstract Traditional anti‐counterfeiting luminescent phosphors are usually composed of single‐mode photoluminescence materials, which greatly limits the security encryption by its static fluorescent pattern. Herein, multi‐mode luminescence properties achieved including fluorescence and persistent (PersL) within single host co‐doping Bi 3+ Eu in CaNaSb 2 O 6 F (CNSOF). A tunable emission is observed from blue (Bi , 3 P 1 → S 0 ) to white then orange‐yellow (Eu 5 D 7 0, 1, 2, 3, 4 as excitation schemes, environment temperatures doping level modulated. Impressively, attributed rapidly disappears after stopping light irradiation, only intense PersL produced can be observed. And a possible model for energy transfer mechanism proposed investigation crystal structure photoluminescence/PersL. schematic logo digital information demonstrated using prepared samples, shows dynamic evolution color brightness. The excellent property multiple outputs, different decay processes, external field stimulation modes (including low light, thermal, mechanical stimuli) present CNSOF:Bi provides fast, low‐cost, effective method advanced applications.

Language: Английский

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Shifting d‐band Center: An Overlooked Factor in Broadening Electromagnetic Wave Absorption Bandwidth

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

Published: Aug. 27, 2024

Abstract Absorption bandwidth is one of the key performance metrics for electromagnetic wave (EMW) absorbers. Traditional oxide absorbers, despite their merits such as abundance, long‐term stability, and low cost, have long been plagued by inferior absorption (typically less than 4 GHz). Herein, a novel concept proposed: introduction cation vacancies heterostructures into oxides can remarkably broaden bandwidth. A broadening value 7.75 GHz observed through this route, surpassing achieved other existing engineering methods, ≈100%. Crucially, study discovers that negative shift in d ‐band center, previously overlooked factor, responsible phenomenon. By inducing heterostructures, center gives rise to an increase carrier concentration promotion charge separation, resulting higher conductive polarization losses, ultimately leading broader The applicability validated another distinctly different system, where also experiences remarkable (from 0 6.86 This offers significant implications designing wide EMW absorbers expands applications various scenarios wearable electronics artificial intelligent devices.

Language: Английский

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Moisture‐Resistant Orange Emitters with Near‐Unity Quantum Yield from Mn²⁺ Alloyed Vacancy‐Ordered Quadruple Perovskites

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(8)

Published: April 9, 2024

Abstract Mn 2+ ‐doped metal halide perovskites present remarkable optical properties in optoelectronic applications, although the realization of high efficiency and stability is still a challenge. In this work, series highly efficient stable orange‐emitting alloyed Cs 4 Cd 1‐ x Bi 2 Cl 12 single crystals are successfully synthesized via hydrothermal reaction. Combined with crystal structure spectral characterization at 7 K, site occupation defect emission systematically discussed. Benefiting from effective [BiCl 6 ] 3− →[MnCl 4− energy transfer lattice distortion, these exhibit maximum internal external quantum yield ≈97% ≈65% 35% heavy doping level. Interestingly, ‐alloyed remarkably waterproof stability, no decrease intensity observed after immersion deionized water for h. After soaking 100 days, can maintain 44%, implying good chemical moisture resistance due to formation protective BiOCl layer. This work provides new insights into optimization mechanism luminescence overcoming downside their waterproofing humid conditions.

Language: Английский

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

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

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

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 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.

Language: Английский

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

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 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.

Language: Английский

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