Inherently Eu2+/Eu3+ Codoped Sc2O3 Nanoparticles as High‐Performance Nanothermometers |
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| Authors: | Yue Pan Xiaoji Xie Qianwen Huang Chao Gao Yangbo Wang Lingxiao Wang Bingxiao Yang Haiquan Su Ling Huang Wei Huang |
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| Affiliation: | 1. Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, China;2. School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, China |
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| Abstract: | Luminescent nanothermometers have shown competitive superiority for contactless and noninvasive temperature probing especially at the nanoscale. Herein, we report the inherently Eu2+/Eu3+ codoped Sc2O3 nanoparticles synthesized via a one‐step and controllable thermolysis reaction where Eu3+ is in‐situ reduced to Eu2+ by oleylamine. The stable luminescence emission of Eu3+ as internal standard and the sensitive response of Eu2+ emission to temperature as probe comprise a perfect ratiometric nanothermometer with wide‐range temperature probing (77–267 K), high repeatability (>99.94%), and high relative sensitivity (3.06% K–1 at 267 K). The in situ reduction of Eu3+ to Eu2+ ensures both uniform distribution in the crystal lattice and simultaneous response upon light excitation of Eu2+/Eu3+. To widen this concept, Tb3+ is codoped as additional internal reference for tunable temperature probing range. |
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| Keywords: | Eu2+ in situ reduction nanothermometers Sc2O3
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