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- W4327921241 abstract "Recently, nanoscale thermometry has attracted extensive attention. Here, we present an innovative approach to enhance the sensitivity of upconversion nanoparticles for thermometry through near-field manipulation. This method involves a composite structure consisting of photonic crystals and upconversion nanoparticles, with the near-field of the nanoparticles manipulated by tuning the absorption of the photonic crystals. The fluorescence intensity ratio (540nm/520 nm) of 4H11/2 and4S3/2 states of upconversion nanoparticles doped with Er3+ ions is sensitive to temperature change and employed as a temperature indicator that satisfies Boltzmann thermal equilibrium. The composite structure exhibited a relative thermometry sensitivity of 21.9 × 10−3 K−1 at 298 K, representing a significant improvement over pure core-shell upconversion nanoparticles with a 63.43% increase in relative sensitivity and a 675% increase in absolute sensitivity. This finding demonstrates the potential of our approach for advancing nanoscale thermometry." @default.
- W4327921241 created "2023-03-21" @default.
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- W4327921241 date "2023-06-01" @default.
- W4327921241 modified "2023-10-15" @default.
- W4327921241 title "Enhanced thermometry sensitivity in upconversion nanoparticles via near-field manipulation" @default.
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- W4327921241 doi "https://doi.org/10.1016/j.ceramint.2023.03.145" @default.
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