This work develops thermometers improving temperature detection in biological tissue, indicating potential for advanced thermometric applications.
, three fluorescence intensity ratio (FIR)-based thermometers are constructed in green, red, and near-infrared (NIR) regions, all revealing high thermometric sensitivity and accuracy. Crucially, the present NIR thermometer enables temperature detection through 8 mm of biological tissue with a negligible FIR deviation, showcasing its exceptional potential for deep-tissue thermal sensing. This work provides a strategic pathway for developing efficient UC materials and advanced optical thermometers for biological applications.
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Xiang et al. (2026) studied this question.
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