Constructing multiform morphologies of YF: Er3+/Yb3+ up-conversion nano/micro-crystals towards sub-tissue thermometry
Constructing multiform morphologies of YF: Er3+/Yb3+ up-conversion nano/micro-crystals towards sub-tissue thermometry
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DOI：
10.1016/j.cej.2016.12.064
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发表时间：
2017-04
影响因子：
15.1
通讯作者：
Hao Suo;Xiaoqi Zhao;Zhiyu Zhang;Ting Li;E. Goldys;Chongfeng Guo
中科院分区：
文献类型：
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作者：
Hao Suo;Xiaoqi Zhao;Zhiyu Zhang;Ting Li;E. Goldys;Chongfeng Guo
通过一步水热法合成了具有均匀米状二维（2D）六角形纳米结构和截角八面体微晶的Er3+/Yb3+共掺杂YF3样品，并提出了它们可能的生长机制。在 980 nm 激发下，随着粒径的增加，样品的上转换 (UC) 发射颜色从黄色精细调制到纯绿色，这可以从非辐射过程和表面效应方面进行解释。通过温度相关的UC光谱，根据2H11/2和4S3/2水平的荧光强度比（FIR）评估不同形态样品的测温能力，并且样品的最佳绝对灵敏度在490 K下均接近约0.0026 K-1。通过离体实验证明了类米纳米晶体用于亚组织温度检测的潜力。结果表明，YF3：Er3+/Yb3+纳米/微晶体的灵敏度与形态和尺寸无关，这为开发具有稳定灵敏度的基于UC的亚组织温度计开辟了有效途径。
Er3+/Yb3+co-doped YF3samples with uniform rice-like, two-dimension (2D) hexagonal nano-architectures and truncated octahedral micro-crystals were synthesized through a one-step hydrothermal method, and their possible growth mechanisms were also proposed. Upon 980 nm excitation, the up-conversion (UC) emitting color of samples was finely modulated from yellow to pure green with increasing the particle size, which was interpreted in terms of non-radiative process and surface effect. Thermometric capabilities of samples with different morphologies were evaluated based on the fluorescence intensity ratio (FIR) of2H11/2and4S3/2levels through temperature-dependent UC spectra, and the optimal absolute sensitivities of samples were all approached to about 0.0026 K-1at 490 K. The potentiality of rice-like nano-crystals for temperature detection in sub-tissue was demonstrated byex vivoexperiments. Results display that the sensitivity of YF3: Er3+/Yb3+nano/micro-crystals is independent of morphologies and sizes, which exploit an effective avenue for developing UC-based thermometers in sub-tissue with stable sensitivity.