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Core–Shell NaYF4:Yb3+/Tm3+@NaGdF4:Ce3+/Eu3+ Nanoparticles for Upconversion and Downconversion Dual-Mode Fluorescence-Based Temperature Sensing
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2022-07-14 , DOI: 10.1021/acsanm.2c01611 Mingzhou Meng 1 , Rui Zhang 1 , Xinmeng Fa 1 , Jianghua Yang 1 , Zhenlong Cheng 1 , Xin Qiao 2 , Jun Ou 1, 3 , Christian Wurth 3 , Ute Resch-Genger 3
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2022-07-14 , DOI: 10.1021/acsanm.2c01611 Mingzhou Meng 1 , Rui Zhang 1 , Xinmeng Fa 1 , Jianghua Yang 1 , Zhenlong Cheng 1 , Xin Qiao 2 , Jun Ou 1, 3 , Christian Wurth 3 , Ute Resch-Genger 3
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NaYF4 as the core and NaGdF4 as the outer layer were used to obtain NaYF4:Yb3+/Tm3+@NaYF4:Ce3+/Eu3+ nanoparticles. Physical and morphological investigations indicated that the obtained nanoparticles were prepared in a hexagonal shape, with the NaGdF4 shell layer uniformly encapsulated on the NaYF4 core. Strong Tm3+ upconversion emission peaks were observed for a 980-nm-laser-excited sample, while strong Eu3+ downconversion emission peaks were observed for a 254-nm-laser-excited sample. By zonal doping of Tm3+ and Eu3+, their fluorescence intensity can be significantly increased; more importantly, simultaneous temperature measurements with dual-mode upconversion/downconversion can be achieved. The temperature measurement properties of the dual mode were also investigated, and it was discovered that the upconversion 3F3 → 3H6 and 1G4 → 3F4 thermocouple energy levels gave the best temperature measurements with maximum absolute and relative sensitivities of 0.0877 K–1 and 1.95% K–1, respectively, which are better than the current temperature measurement sensitivities of most rare-earth-based materials. This material was prepared as fiber-optic temperature-sensing probes to detect the temperature in the environment in real time and was found to perform excellently for temperature measurement.
中文翻译：
核壳 NaYF4:Yb3+/Tm3+@NaGdF4:Ce3+/Eu3+ 纳米粒子用于上转换和下转换双模荧光温度传感
以NaYF 4为核心，以NaGdF 4为外层，得到NaYF 4 :Yb 3+ /Tm 3+ @NaYF 4 :Ce 3+ /Eu 3+纳米粒子。物理和形态学研究表明，所得纳米颗粒呈六边形，NaGdF 4壳层均匀包裹在NaYF 4核上。对于 980 nm 激光激发的样品观察到强的 Tm 3+上转换发射峰，而对于 254 nm 激光激发的样品观察到强的 Eu 3+下转换发射峰。通过 Tm 3+的区域掺杂和Eu 3+，它们的荧光强度可以显着提高；更重要的是，可以实现双模上变频/下变频的同时温度测量。还研究了双模的温度测量特性，发现上转换3 F 3 → 3 H 6和1 G 4 → 3 F 4热电偶能级给出了最佳的温度测量，最大绝对和相对灵敏度为 0.0877 K –1和 1.95% K –1，分别优于目前大多数稀土基材料的温度测量灵敏度。这种材料被制备成光纤温度传感探针，用于实时检测环境中的温度，并被发现在温度测量方面表现出色。
更新日期：2022-07-14
中文翻译：
核壳 NaYF4:Yb3+/Tm3+@NaGdF4:Ce3+/Eu3+ 纳米粒子用于上转换和下转换双模荧光温度传感
以NaYF 4为核心，以NaGdF 4为外层，得到NaYF 4 :Yb 3+ /Tm 3+ @NaYF 4 :Ce 3+ /Eu 3+纳米粒子。物理和形态学研究表明，所得纳米颗粒呈六边形，NaGdF 4壳层均匀包裹在NaYF 4核上。对于 980 nm 激光激发的样品观察到强的 Tm 3+上转换发射峰，而对于 254 nm 激光激发的样品观察到强的 Eu 3+下转换发射峰。通过 Tm 3+的区域掺杂和Eu 3+，它们的荧光强度可以显着提高；更重要的是，可以实现双模上变频/下变频的同时温度测量。还研究了双模的温度测量特性，发现上转换3 F 3 → 3 H 6和1 G 4 → 3 F 4热电偶能级给出了最佳的温度测量，最大绝对和相对灵敏度为 0.0877 K –1和 1.95% K –1，分别优于目前大多数稀土基材料的温度测量灵敏度。这种材料被制备成光纤温度传感探针，用于实时检测环境中的温度，并被发现在温度测量方面表现出色。
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