Abstract
Fluorescence intensity ratio (FIR) based temperature sensing strategy with self-referencing characteristics attracts great attention owing to its independence from sensor concentration and other environmental variables. In this work, a multichannel ratiometric nanothermometer based on SrYbF5: Nd nanocrystals were developed. Under 980 nm laser excitation, the SrYbF5: Nd nanocrystals exhibited typical 4f-4f transitions including green, red and NIR emissions. These transitions showed different temperature dependent intensity variations, which can be used for multichannel temperature sensing. Six FIR modes are studied for temperature sensing. The maximum absolute temperature sensitivity of 1.62 K−1 and relative sensitivity of 3.69 % K−1 are achieved.
Published Version
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