Growth regularity and phase diagrams of NaLu0.795−xYxF4 upconversion nanocrystals synthesized by automatic nanomaterial synthesizer

纳米材料 光子上转换 材料科学 纳米晶 纳米技术 相(物质) 相图 纳米颗粒 光电子学 兴奋剂 化学 有机化学
作者
Dan Zhang,Yanhui Dong,Daguang Li,Heng Jia,Weiping Qin
出处
期刊:Nano Research [Springer Science+Business Media]
卷期号:14 (12): 4760-4767 被引量:12
标识
DOI:10.1007/s12274-021-3420-1
摘要

The growth regularities of nanomaterials are often concealed by the contingency of preparation. Therefore, it is always very difficult to figure out growth regularities of nanomaterials due to the accompanying undulation of products. A series of precise synthesis was performed by using an automatic nanomaterial synthesizer (ANS) in order to explore the growth regularity of complex NaREF4 (RE: rare earth) upconversion nanocrystals (UCNCs). The use of ANS significantly enhances the experimental controllability, repeatability, and success rate. Mass experimental research exhibited that the NaLu0.795−xYxF4:Yb3+/Tm3+ (x = 0−0.795) UCNCs can vary their sizes continuously in a wide range to accurately meet the experimenter’s design merely by controlling the concentration of Y3+. A notable growth regularity was obtained and intuitively shown in growth phase diagrams. Furthermore, in the case of having excellent monodispersity, pure hexagonal phase, and uniform morphology, the prepared UCNCs still retained superior upconversion luminescent (UCL) properties. The regular changes in UCL properties further confirmed the growth regularity of the UCNCs. After analyzing the experimental data, we found that NaLu0.795−xYxF4 combined the advantages of NaYF4 and NaLuF4 hosts with desired sizes. These results provide a guidance for the exploration of growth regularities of other similar nanomaterials and also for the structure design of the required nanomaterials.
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