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首页> 外文期刊>Optics Letters >Strategy for thermometry via Tm3+-doped NaYF4 core-shell nanoparticles
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Strategy for thermometry via Tm3+-doped NaYF4 core-shell nanoparticles

机译:通过掺Tm3 +的NaYF4核-壳纳米粒子进行测温的策略

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Optical thermometers usually make use of the fluorescence intensity ratio of two thermally coupled energy levels, with the relative sensitivity constrained by the limited energy gap. Here we develop a strategy by using the upconversion (UC) emissions originating from two multiplets with opposite temperature dependences to achieve higher relative temperature sensitivity. We show that the intensity ratio of the two UC emissions, F-3(2,3) and (1)G(4), of Tm3+ in beta-NaYF4:20%Yb3+, 0.5%Tm-3+/NaYF4:1%Pr3+ core-shell nanoparticles under 980 nm laser excitation exhibits high relative temperature sensitivity between 350 and 510 K, with a maximum of 1.53%K-1 at 417 K. This demonstrates the validity of the strategy, and that the studied material has the potential for high-performance optical thermometry. (C) 2014 Optical Society of America
机译:光学温度计通常利用两个热耦合能级的荧光强度比,其相对灵敏度受有限的能隙限制。在这里,我们通过使用源自两个多重峰且具有相反温度依赖性的上转换(UC)发射来开发策略,以实现更高的相对温度灵敏度。我们显示出β-NaYF4:20%Yb3 +,0.5%Tm-3 + / NaYF4:1中Tm3 +的两种UC发射的强度比F-3(2,3)和(1)G(4)在980 nm激光激发下,%Pr3 +核-壳纳米粒子在350和510 K之间显示出较高的相对温度敏感性,在417 K下的最大相对温度敏感性为1.53%K-1。这证明了该策略的有效性,并且所研究的材料具有高性能光学测温的潜力。 (C)2014年美国眼镜学会

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