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中文摘要：
采用水热法合成多种形貌和尺寸的NaYF4：Yb3＋,Er3＋上转换发光材料，探讨螯合剂、敏化剂、激活剂、氟化铵用量及水热时间对目标产物发光性能的影响规律，并通过正交实验优化Yb3＋、Er3＋共掺杂NaYF4上转换发光纳米材料的合成条件。采用XRD、SEM和荧光光谱对目标产物进行对比分析。结果表明：目标产物为β-NaYF4，在980nm红外光的激发下，发出明亮的绿光，最强发射峰在542nm。可通过改变螯合剂的种类来控制生成不同尺寸（纳米级或微米级）和形貌（管状、球形或六棱柱形）的目标产物。所制备的NaYF4：Yb3＋／Er3＋上转换发光材料分散性好、荧光强度高，在生物探针及生物成像等领域具有潜在的应用价值。
英文摘要：
NaYF4： Yb3＋, Er3＋ up-conversion （UC） luminescence materials with different shapes and sizes were obtained by a facile hydrotherrnal method. The effects of chelating agent, sensitizer concentration, activator concentration, NH4F concentration and the hydrothermal time on the 1 synthetic conditions were optimized by orthogonal experiments properties of the products were investigated. And the Then, the products were characterized by XRD and SEM. The results show that the minimum particle size of the sample is about 100 nm. The fluorescence spectra is also demonstrated, the results show that the products emit green fluorescence at 542 nm when they are excited by a 980 nm laser source, fl-NaYF4 with different shapes （tubular, nanospheres, hexagonal prisms） and sizes（from nano-scale to micro-scale） can be selectively synthesized in different chelating agents, fl-NaYF4： Yb3＋, Er3＋have the potential application in biological labeling and imaging for its strong UC emission intensity and better dispersion.
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