期刊
CHEMICAL ENGINEERING JOURNAL
卷 313, 期 -, 页码 65-73出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.12.064
关键词
Up-conversion; Nano/Micro-crystals; Morphology; Thermometry; Biological sensing
资金
- National Natural Science Foundation of China [11274251, 11504295, 51672215]
- Research Fund for the Doctoral Program of Higher Education of China (RFDP) [20136101110017]
- Technology Foundation for Selected Overseas Chinese Scholar
- Ministry of Personnel of China (excellent)
- Natural Science Foundation of Shaanxi Province [2014JM1004]
- Foundation of Shaanxi Province Educational Department [15JS101, 15JK1712]
- Northwest University (NWU) Graduate Innovation and Creativity Funds [YZZ15030]
Er3+/Vb(3+) co-doped YF3 samples 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) of H-2(11/2) and S-4(3/2) levels through temperature-dependent UC spectra, and the optimal absolute sensitivities of samples were all approached to about 0.0026 K-1 at 490 K. The potentiality of rice-like nano-crystals for temperature detection in sub-tissue was demonstrated by ex vivo experiments. 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. (C) 2016 Elsevier B.V. All rights reserved.
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