中文摘要：

以稀土氯化物、NaF和柠檬酸钠为反应原料，水浴加热合成水溶性LaF3：Eu荧光纳米粒子，考察了反应温度、溶液pH值和反应原料配比等对合成粒子荧光性能的影响，给出了最佳反应条件。红外光谱实验证明，合成粒子表面包覆了柠檬酸根。XRD测试表明，合成粒子是单一相LaF3晶体，掺杂Eu^3＋替代La^3＋进入LaF3晶格，晶粒径为8．3nm。TEM实验表明，合成粒子粒度分布较均匀。该合成方法简便易行，合成粒子的水溶液荧光强度较高且荧光强度稳定，有望将其和生物分子连接，进行生物分子的检测。

英文摘要：

Water-soluble LaF3 ： Eu nanoparticles were synthesized using rare earth chloride, NaF and sodium citrate as starting materials by water bath heating. Luminescent properties of the samples synthesized at different experiment conditions, such as reaction temperature, pH value and the ratio of starting materials were investigated and the best reaction conditions were obtained. IR spectrum shows that as-prepared nanoparticles are coa- ted by citrate. X-ray diffraction pattern displays that the nanoparticles are single LaF3 crystals while dopant Eu^3＋ enter the crystals instead of La^3＋ and the size of the crystals is about 8.3nm. TEM photo shows that asprepared nanoparticles are sphere with nearly uniform size. The synthesizing method is convenient and easy, and the solution of as-prepared nanoparticles shows high and stable fluorescent intensity. It is hoped that the particles can be combined with bimolecular and detection of bimolecular can be completed.