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以PEG为表面活性剂,NaF为氟源,在水热条件下合成出均一的YF3:Eu3+发光纳米束,对其结构进行了表征,并对其形成机制进行了初步探讨。XRD分析表明:样品为结晶良好的正交相YF3。透射电镜照片表明:所得样品为直径200nm,长度约800nm的YF3:Eu3+纳米束,该纳米束由直径30nm,长度70nm的纳米晶自组装而成。SAED显示所得样品为单晶结构。荧光光谱表明:在394nm的紫外光激发下,最强发射峰出现在591nm处,对应于Eu3+的5D0→7F1的磁偶极跃迁,发橙红光。
The homogeneous YF3: Eu3 + luminescent nanobeam was synthesized under hydrothermal conditions using PEG as surfactant and NaF as the fluorine source. The structure of the luminescent nanowires was characterized and their formation mechanism was discussed. XRD analysis shows that the sample is a well-crystallized orthogonal phase YF3. TEM images show that the obtained sample is a YF3: Eu3 + nanobeam with a diameter of 200 nm and a length of about 800 nm. The nanowire is self-assembled by a nanocrystal with a diameter of 30 nm and a length of 70 nm. SAED shows the resulting sample is a single crystal structure. Fluorescence spectra showed that the strongest emission peak appeared at 591 nm under the excitation of 394 nm UV light, corresponding to the magnetic dipole transition of 5D0 → 7F1 of Eu3 + with orange-red light.