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The integration of down-conversion (DC) and up-conversion (UC) photoluminescence mechanisms has attracted significant attention for applications in optical thermometry and solid-state lighting. Combining both emission processes within a single material enables dual-mode temperature sensing, offering enhanced flexibility and precision. In this study, we report a pioneering investigation of the dual-mode thermometric performance of LiCaLa(MoO) phosphors co-doped with Er (0.

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Optical information encryption technology based on the emission color from rare earth ions shows great potential with the information security problems increasing. In this work, the up-conversion processes of the core-shell structured Er@Y@Tm phosphors can be precisely controlled by modulating the excitation conditions and temperature. The luminescent centers, Er and Tm, are spatially separated in different layers of the core-shell structure, enabling wavelength responsive pure red and blue emission color under 980 and 1550 nm laser excitation, respectively.

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Despite significant efforts in developing novel biomaterials to regenerate tissue, only a few of them have successfully reached clinical use. It has become clear that the next generation of biomaterials must be multifunctional. Smart biomaterials can respond to environmental or external stimuli, interact in a spatial-temporal manner, and trigger specific tissue/organism responses.

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Relationship between Optical and Thermoelectric Properties of Er and Nb Doped SrTiO Materials.

ACS Appl Mater Interfaces

August 2025

Key Laboratory of Biophysics and Bioinformatics of Inner Mongolia Autonomous Region at Inner Mongolia University, School of Physical Science and Technology, Inner Mongolia University, 235 West University Road, Hohhot, Inner Mongolia 010021, China.

SrTiO exhibits promising potential in both thermoelectric and optical properties. However, research on these two properties has consistently been carried out in two relatively independent fields. In this work, the regulatory mechanisms of thermoelectric and optical properties were proposed based on photon-excited electron-phonon interactions.

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Ultrasensitive Digital Immunoassay in Homogenous Format by Singlet-Oxygen Activated Up-conversion Luminescence.

Angew Chem Int Ed Engl

July 2025

State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.

New diagnostic tools for accurately detecting extremely low levels of protein biomarkers in the bloodstream are essential for a wide range of clinical applications. We develop a singlet-oxygen activated up-conversion luminescence assay (SOLA) that enables ultrasensitive digital immunometric detection of protein biomarkers in homogenous format with no wash steps. This approach designs a pair of labeled antibodies, one labeled with a singlet-oxygen (O) nanogenerator of porphyrin-metal organic framework (pMOF) and the other tagged using an upconversion nanoparticle (UCNP) nanoreporter with luminescence caged by O-cleavable quenchers.

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