Achieving ultrasensitive temperature sensing through non-thermally coupled energy levels to overcome energy gap constraints

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(5), P. 1522 - 1530

Published: Jan. 1, 2024

Ultrasensitive temperature sensing is realized through non-thermally coupled energy levels to overcome gap constraints.

Language: Английский

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Enhancement of Luminescence from Lanthanide Metal–Organic Frameworks by Ytterbium and Calcium Doping: Application to Photonic Barcodes and Fingerprint Detection

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(27)

Published: March 1, 2024

Abstract Emission from metal–organic frameworks (MOFs) made Eu 3+ and 1,3,5‐benzenetricarboxylic acid (BTC) is enhanced eightfold by doping with Y Ca 2+ ions. The ions are shown to substitute into the MOFs, MOFs structure be retained at high levels. emission enhancement associated variations in local electric field centers MOFs. Calculations indicate that HOMO LUMO levels vary considerably both low‐level doping. These then modulates concentration quenching, ligand‐metal energy transfer processes, centers, qualitatively accounting for primary observed features. For UV excitation (250, 295, 393 nm, respectively), greatest comes doped 10% , 89% 1% . In a photonic barcode application, facilitate increased information storage density, fingerprinting they displayed lead higher photostability reduced materials demand.

Language: Английский

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Sr2AlTaO6: Ni2+ phosphors with excellent IQE and thermal stability as NIR-II source for night vision, nonvisual detection, and far-field imaging

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 505, P. 159559 - 159559

Published: Jan. 13, 2025

Language: Английский

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Thermochromic Upconversion Emission in Tm³⁺/Yb³⁺-Codoped La₂Mo₃O₁₂ Microparticles via Negative Thermal Expansion Engineering for Ultrahigh Sensitivity Optical Thermometry

The Journal of Physical Chemistry C, Journal Year: 2023, Volume and Issue: 127(7), P. 3808 - 3818

Published: Feb. 13, 2023

To develop high-sensitivity optical thermometers, Yb3+/Tm3+-codoped La2Mo3O12 microparticles were synthesized by the sol–gel method. With aid of in situ X-ray diffraction, resultant are verified to possess negative thermal expansion (NTE) properties. When excited at 980 nm, upconversion (UC) emission properties final products investigated, which their strongest fluorescence intensities reached x = 0.07. Due coexistence increased energy transfer, cross-relaxation, and nonradiative relaxation procedures, as-prepared present thermochromic UC emissions. Moreover, intensity arising from 3F2,3 level 583 K is 21 times higher than its starting value 303 K, resulting thermally enhanced luminescence microparticles. By employing ratio technique investigate temperature-related emissions 1G4 levels, thermometric characterization designed compounds explored, where highest absolute relative sensitivities 0.44 K–1 7.37% K–1, respectively. Furthermore, according lifetimes levels Tm3+, developed 0.36% 0.23% Ultimately, visual thermometry also realized studied samples owing Our findings propose a facile strategy NTE regulate behaviors rare-earth ions so as obtain high-sensitive luminescent materials.

Language: Английский

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Ultrahigh sensitivity upconversion low temperature sensorsviamanipulating the non-thermally coupled levels of Er³⁺ions

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(26), P. 8758 - 8766

Published: Jan. 1, 2023

The GC material produces excellent blue UC emission under 980 nm or 1550 excitation, where the level ( 2 H 9/2 ) could form a novel NTCL 11/2 – with other energy levels, realizing ultrahigh sensitivity low temperature sensing.

Language: Английский

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Ca₂LaTaO₆:Bi³⁺/Mn⁴⁺ Phosphors with High Brightness Far-Red Emitting and Luminescence Enhancement for Plant Growth LED Lights and Temperature Sensor

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(12), P. 5365 - 5377

Published: March 11, 2024

Herein, Bi3+/Mn4+ doped Ca2LaTaO6 phosphors with a double-perovskite structure were successfully synthesized solid-state reaction at high temperature. The photoluminescence (PL) performances investigated in detail. blue radiation (∼465 nm) from the Bi3+ ion and red (∼686 originating Mn4+ obtained under 313 nm excitation. Especially, pathway of energy transfer (Bi3+ → Mn4+) contributes to enhance emission intensity (Mn4+: ∼686 Ca2LaTaO6:Bi3+/Mn4+ system. PL mechanism was analyzed through luminescence lifetimes spectra. Moreover, emitting bands primarily matched absorbing carotenoids phytochrome PFR on behalf plant growth, so suitable for design growth light near-ultraviolet At last, optical temperature dependent ratio technology. sample has presented excellent measuring relative sensitivity (SR = 2.106% K–1). results illustrated that phosphor also can be used develop an sensor.

Language: Английский

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Dual-mode optical ratiometric thermometry using Pr³⁺-doped NaSrGd(MoO₄)₃ phosphors with tunable sensitivity

Dalton Transactions, Journal Year: 2023, Volume and Issue: 52(47), P. 18069 - 18081

Published: Jan. 1, 2023

Owing to some special superior features, luminescence ratiometric thermometry has acquired popularity, particularly dual excitation single emission (SBR) and (FIR). Nonetheless, it remains difficult create that can operate in multiple modes. The integration of FIR SBR techniques paves the way for advancements various fields, including industrial processes, environmental monitoring, biomedical applications, where accurate temperature measurements are crucial optimal performance safety. In this work, we describe a measure based on light-induced fluorescence Pr3+ NaSrGd(MoO4)3 (NSGM). optical properties were investigated by UV-visible absorption, PL, PLE spectroscopy. On one hand, exhibits varying temperature-dependent behavior upon 450 nm excitation. Thus, thermometer between levels been generated, with highest sensitivity approximately 0.83% K-1 over wide range 290-440 K. Furthermore, luminescent was evaluated same range. effect concentration red-emitting thermometers detail. Sa Sr values gradually increase, content reaching maximum value 2.4% at 413 K NSGM:10% phosphor. These results show ions have potential be optically active centers applications using techniques. It is anticipated present work will inspire other researchers employ multi-mode more widely.

Language: Английский

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Precise Synergistic Photothermal Therapy Guided by Accurate Temperature‐Dependent NIR‐II Fluorescence Imaging

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(14)

Published: Dec. 22, 2023

Abstract Photothermal therapy (PTT) is considered a promising treatment strategy for solid tumors. However, local hyperthermia (over 45°C) during PTT can cause severe side effects in neighboring healthy tissues. with accurate temperature feedback compelling to ablate tumors and reduce effects, but it still faces challenges. Here, new kind of phototheranostic nanoparticle, namely 17‐RF@Ag 2 Se developed, enabling vivo NIR‐II fluorescence tracking, nanothermometry as well synergistic heat‐shock protein (HSP) inhibition. Precise high spatiotemporal resolution achieved the help designed imaging‐photothermal linkage apparatus. Upon intravenous injection, specifically accumulated targeted by overexpressed integrin α v β 3 , which monitored imaging Ag QDs. Further, release HSP inhibitor, tanespimycin (17‐AAG), enhances thermosensitivity tumor cells. Subsequently, internal precisely adjusted via temperature‐dependent QDs apparatus calibration, thereby achieving efficient safe PTT. Also, results present method monitoring control vivo, be applied other biomedical studies.

Language: Английский

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Doping-mediated thermal control of phase transition for supersensitive ratiometric luminescence thermometry

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152312 - 152312

Published: May 17, 2024

Language: Английский

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Excellent temperature sensitivities based on the FIR technique of up-conversion luminescence in a novel NaLaTi₂O₆:Yb³⁺,Tm³⁺ material

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(21), P. 7464 - 7474

Published: Jan. 1, 2024

Excellent temperature sensitivities were realized in NaLaTi 2 O 6 :Yb 3+ ,Tm based on FIR technique.

Language: Английский

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