Evolution of Er3+/Yb3+-codoped NaGdF4 nanorods at room temperature for non-contact nanothermometer and optical heater
Evolution of Er3+/Yb3+-codoped NaGdF4 nanorods at room temperature for non-contact nanothermometer and optical heater
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DOI：
10.1007/s00339-020-3376-0
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
Jiu-Song Zhu;Peng Du;J. Yu
中科院分区：
文献类型：
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作者：
Jiu-Song Zhu;Peng Du;J. Yu
采用巧妙的反应技术，在室温下制备了Er3+/Yb3+共掺杂的nagdf4纳米棒。详细考察了合成时间对化合物相类型和微观结构的影响。当反应时间为3 h时，得到了Er3+/Yb3+共掺杂的单六边形纳米棒。在980 nm光激发下，合成的纳米棒中检测到可见的上转换发射，其发光机制属于双光子吸收过程。基于2h11 /2和4s3 /2热耦合能级，通过荧光强度比技术讨论了所得纳米棒的光学测温行为，在491 K时，传感器的最大灵敏度约为0.0021 K−1。此外，我们还研究了Er3+/Yb3+共掺杂的nagdf4纳米棒的激光诱导光学加热性能，当激发泵浦功率为260 mW时，最终产品的温度提高到348 K。这些结果表明，双功能Er3+/Yb3+共掺杂的nagdf4纳米棒是同时用于纳米温度计和光学加热器的有希望的候选材料。
The homogenous Er3+/Yb3+-codoped NaGdF4nanorods were prepared through an ingenious reaction technology at room temperature. The influence of synthetic time on the phase category and microstructure of the studied compounds was examined in detail. When the reaction time was 3 h, the Er3+/Yb3+-codoped NaGdF4nanorods with single hexagonal phase were obtained. Upon 980 nm light excitation, visible upconversion emissions were detected in the synthesized nanorods and the involved luminescent mechanism pertained to be a two-photon absorption process. Based on the2H11/2and4S3/2thermally coupled levels, the optical thermometric behaviors of the resultant nanorods were discussed via fluorescence intensity ratio technology and the maximum sensor sensitivity was about 0.0021 K−1at 491 K. Moreover, we also dealt with the laser-induced optical heating properties of the Er3+/Yb3+-codoped NaGdF4nanorods and the temperature of the final product was boosted to 348 K when the excitation pump power was 260 mW. These achievements imply that the bifunctional Er3+/Yb3+-codoped NaGdF4nanorods are a promising candidate for simultaneous nanothermometer and optical heater.