Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Июль 21, 2023

Abstract Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes risetimes) phosphor to measure temperature. This provides precise thermal readouts with superior spatial resolution in short acquisition times. Although thermometry just starting become more mature subject, it exhibits enormous potential several areas, e.g., optoelectronics, photonics, micro‐ nanofluidics, nanomedicine. work reviews latest trends field, including establishment comprehensive theoretical background standardized practices. The reliability, repeatability, reproducibility are also discussed, along use multiparametric analysis artificial‐intelligence algorithms enhance readouts. In addition, examples provided underscore challenges faces, alongside need for continuous search design new materials, experimental techniques, procedures improve competitiveness, accessibility, popularity technology

Язык: Английский

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Regulating Exciton De‐Trapping of Te⁴⁺‐Doped Zero‐Dimensional Scandium‐Halide Perovskite for Fluorescence Thermometry with Record High Time‐Resolved Thermal Sensitivity

Advanced Materials, Год журнала: 2023, Номер 35(44)

Опубликована: Авг. 21, 2023

Abstract Fluorescence thermometry has been propelled to the forefront of scientific attention due its high spatial resolution and remote non‐invasive detection. However, recent generations thermometers still suffer from limited thermal sensitivity ( S r ) below 10% change per Kelvin. Herein, this work presents an ideal temperature‐responsive fluorescence material through Te 4+ ‐doped 0D Cs 2 ScCl 5 ·H O, in which isolated polyhedrons endow highly localized electronic structures, strong electron–phonon coupling facilitates formation self‐trapped excitons (STEs). With rising temperature, dramatic asymmetric expansion soft lattice induces increased defects, exciton–phonon coupling, low activation energy, evokes a rapid de‐trapping process STEs, enabling several orders magnitude changes lifetime over narrow temperature range. After regulating with different doping, record‐high (27.36% K −1 lifetime‐based detection is achieved at 325 K. The robust stability against multiple heating/cooling cycles long‐term measurements enables uncertainty 0.067 Further, developed are demonstrated for local monitoring operating on internal components. It believed that constitutes solid step towards building next generation ultrasensitive based low‐dimensional metal halides.

Язык: Английский

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Lanthanide luminescence nanothermometer with working wavelength beyond 1500 nm for cerebrovascular temperature imaging in vivo

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

Опубликована: Март 15, 2024

Abstract Nanothermometers enable the detection of temperature changes at microscopic scale, which is crucial for elucidating biological mechanisms and guiding treatment strategies. However, monitoring micron-scale structures in vivo using luminescent nanothermometers remains challenging, primarily due to severe scattering effect tissue that compromises imaging resolution. Herein, a lanthanide luminescence nanothermometer with working wavelength beyond 1500 nm developed achieve high-resolution vivo. The energy transfer between ions (Er 3+ Yb ) H 2 O molecules, called environment quenching assisted downshifting process, utilized establish temperature-sensitive emissions 1550 980 nm. Using an optimized thin active shell doped ions, nanothermometer’s thermal sensitivity emission intensity are enhanced by modulating process. Consequently, minimally invasive cerebrovascular system mice resolution nearly 200 μm achieved nanothermometer. This work points method micron-level vivo, potentially giving insights into research sensing, disease diagnosis, development.

Язык: Английский

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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

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Rational Design of NIR‐II Ratiometric Fluorescence Probes for Accurate Bioimaging and Biosensing In Vivo

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Март 12, 2024

Abstract Intravital fluorescence imaging in the second near‐infrared window (NIR‐II, 900–1700 nm) has emerged as a promising method for non‐invasive diagnostics complex biological systems due to its advantages of less background interference, high tissue penetration depth, contrast, and sensitivity. However, traditional NIR‐II imaging, which is characterized by “always on” or “turn mode, lacks ability quantitative detection, leading low reproducibility reliability during bio‐detection. In ratiometric can realize reliable analysis detection vivo providing reference signals correction, generating new opportunities prospects bioimaging biosensing. this review, current design strategies sensing mechanisms probes biosensing applications are systematically summarized. Further, challenges, future perspectives designing also discussed. It hoped that review provide effective guidance promote adoption vivo.

Язык: 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, Год журнала: 2024, Номер unknown

Опубликована: Апрель 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.

Язык: Английский

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Eu³⁺‐Activated Single‐Band Ratiometric Nanothermometry by Lattice Negative Thermal Expansion

Laser & Photonics Review, Год журнала: 2023, Номер 17(8)

Опубликована: Апрель 3, 2023

Abstract Single‐band ratiometric (SBR) thermometry has recently emerged as a powerful alternative to its dual‐emission counterparts because it can avoid the large uncertainties related emission spectral overlap or light absorption/scattering by medium. Herein, novel SBR thermometric scheme in Sc 2 Mo 3 O 12 :Eu 3+ nanosheet that depends on thermal enhancement of charge‐transfer state absorption between 2− and Eu is reported. Mechanistic investigation reveals vital role lattice negative expansion (NTE) for thermally enhanced emissions according configuration coordinate model. In contrast, serious quenching detected under excitation wavelength corresponding ground absorption. Such wavelength‐dependent behavior luminescence enabled with high sensitivity resolution ( S r = 2.0% K −1 , δT 0.121 at 363 K). Finally, applicability proposed model real‐world sensing scenarios demonstrated using as‐fabricated flexible thin‐film, offering accurate real‐time temperature detection local hotspot electronic component.

Язык: Английский

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Ultrasensitive NIR‐II Ratiometric Nanothermometers for 3D In Vivo Thermal Imaging

Advanced Materials, Год журнала: 2023, Номер 36(11)

Опубликована: Дек. 13, 2023

Abstract Luminescent nanothermometry, particularly the one based on ratiometric, has sparked intense research for non‐invasive in vivo or intracellular temperature mapping, empowering their uses as diagnosis tools biomedicine. However, ratiometric detection still suffers from biased sensing induced by wavelength‐dependent tissue absorption and scattering, low thermal sensitivity ( S r ), lack of imaging depth information. Herein, this work constructs an ultrasensitive NIR‐II nanothermometer with self‐calibrating ability 3D thermographic imaging, which temperature‐insensitive lanthanide nanocrystals strongly temperature‐quenched Ag 2 quantum dots are co‐assembled to form a hybrid nanocomposite material. Precise control over amount ratio between two sub‐materials enables manipulation heat‐activated back energy transfer Yb 3+ nanoparticles, thereby rendering up 7.8% °C −1 at 43.5 °C, higher than 6.5% entire physiological range. Moreover, luminescence intensity separated spectral regions within narrow emission peak is used determine information nanothermometers living mice correct effect 2D therefore allows proof‐of‐concept demonstration accurate constituting solid step toward development advanced nanothermometry biological applications.

Язык: Английский

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Healthy and High‐Quality Single‐Source Lighting Based on Double‐Doped Tin Halide Engineering

Laser & Photonics Review, Год журнала: 2023, Номер 17(9)

Опубликована: Апрель 3, 2023

Abstract Single‐source white light‐emitting diodes (WLEDs) with smart regulation of correlated color temperature (CCT) are indispensable for the next generation WLEDs aimed at healthy and high‐quality illumination, where a suitable CCT value is closely related to our emotions circadian rhythm. Herein, this work constructs single‐component emission layer WLED high performance controllable daily lighting through Bi 3+ /Te 4+ dual‐doped Cs 2 SnCl 6 engineering. The efficient energy transfers between triple self‐trapped exciton states from doping allow two tunable broadband emissions that can cover full‐color region, thereby yielding standout color‐rendering index 94 fabricated WLED. robust stability against heat, ultraviolet light, environmental oxygen/water induces long half‐lifetime up 1104 h. Moreover, strategy endows emitter excitation‐dependent luminescent characteristics, enabling single emissive device realize switching control cold‐, positive‐, warm‐white light by converting excitation chip. Meanwhile, continuous different application scenarios be achieved adjusting current chips. This constitutes solid step toward building single‐source based on lead‐free metal halides.

Язык: Английский

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Constructing Efficient and Thermostable Red‐NIR Emitter via Cross Relaxation and Crystal‐Field Engineering of Holmium‐Based Perovskite‐Type Half Metal

Laser & Photonics Review, Год журнала: 2023, Номер 18(5)

Опубликована: Дек. 31, 2023

Abstract Lanthanide ions, as dopants, have evoked widespread research interest owing to the rich optical, magnetic, and electrical properties, but their luminescent intensity is always limited by typical concentration quenching. Herein, a holmium‐based double perovskite of Cs 2 NaHoCl 6 reported, which surprisingly breaks through this barrier achieves efficient red‐NIR emission virtue large unit cell, low phonon energy, high content activators, cross relaxation phenomenon between Ho 3+ . The heavy also endows intriguing half‐metallic nature with down‐spin conducting band an up‐spin insulating band. After performing ion doping on crystallographic sites Na + , photoluminescence quantum yield such emitter under 450 nm excitation dramatically promoted 82.3%, benefiting from improved crystal field environment that alleviates parity forbidden rule suppresses non‐radiative recombination loss. Furthermore, heat‐favorable phonon‐assisted population processes enable robust photostability against thermal By combining chip, light‐emitting diodes are fabricated, in wide‐coverage NIR emissions ideally suited for medical light source, night vision, nondestructive examination, transmission imaging. It believed work will open avenue enhancing fluorescence lanthanide ions developing advanced spintronic materials.

Язык: Английский

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