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- W3163788494 endingPage "127111" @default.
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- W3163788494 abstract "The optical nano-thermometers with near-infrared-II (NIR-II) luminescence (1000∼1700 nm) have drawn growing interest owing to the unique merits such as deep-tissue penetration and excellent spatial resolution. Herein, we report a simple way to improve the NIR-II luminescence and temperature sensing sensitivity simultaneously in Er3+/Yb3+: ZrO2 nanocrystals with the introduction of Gd3+ ions. X-ray diffraction and transmission electron microscopy measurements validate that the addition of Gd3+ ions can change the host lattice parameter and decrease the crystalline grain size of the samples. The optical investigation shows that the remarkable enhancements in the NIR-II emissions of Yb3+ (1036 nm) and Er3+ (1527 nm) are realized via Gd3+ doping under 980 nm excitation, which can be interpreted based on the accelerated radiative transition rate and non-radiative Yb3+-Er3+ energy transfer rate. Meanwhile, the thermal sensing sensitivity of the samples shows a strong dependence on the Gd3+ concentrations, when the fluorescence intensity ratio between Yb3+: 2F5∕2 →2F7∕2 and Er3+: 4I13∕2 →4I15∕2 transitions is chosen for temperature sensing. Both the optimal NIR-II luminescence and thermal sensitivity are achieved in 1 mol%Gd3+ co-doped sample. The proposed route here may help in the development of efficient NIR-II luminescence materials for thermometry in the biological and medical fields." @default.
- W3163788494 created "2021-05-24" @default.
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- W3163788494 date "2021-10-01" @default.
- W3163788494 modified "2023-10-15" @default.
- W3163788494 title "An effective way to improve near-infrared-II luminescence and optical thermometry performance via Gd3+ incorporation in Er3+, Yb3+: ZrO2 nanocrystals" @default.
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- W3163788494 doi "https://doi.org/10.1016/j.optcom.2021.127111" @default.
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