采用直接沉淀法合成了Fe3O4@YF3:Eu3+核壳结构磁性.荧光性双功能纳米复合颗粒,对其结构和性能进行了表征。XRD分析表明,得到了结晶良好的尖晶石型Fe304纳米晶和正交相的YF3纳米晶。TEM照片表明,双功能复合颗粒具有明显的核壳结构。构成核的Fe3O4纳米颗粒尺寸在40~80nm之间。Fe3O4@YF3:Eu3+核壳结构复合纳米颗粒的尺寸约为100~250nm,壳层YF3:Eu3+厚度介于20—30nm之间。EDS分析表明样品由Y,F,Eu,O和Fe元素组成。荧光光谱和磁性测试结果表明,复合颗粒同时具有良好的发光性和较强的磁性,使其在生物医学领域具有潜在的应用。
The Fe3O4@YF3:Eu3+ bifunctional composite particles with core-shell structure were fabricated via a facile direct precipitation method, the structure and properties were characterized. The XRD analysis indicated that the spinel Fe3O4 nanocrystals and orthogonal phase YF3 nanocrystals were obtained. The TEM images showed that the bifunctional composites had obvious core-shell structure, the diameter of the Fe3O4 core was between 40 - 80 nm and the size of the Fe3O4@YF3:Eu3+ composites was about 100 250 nm, the shell thickness of YF3 :Eu3+ ranged from 20 to 30 nm. The EDS analysis showed that the samples were composed of Y, F, Eu, O and Fe. The photoluminescence spectra and magnetic properties indicated that the core-shell structured composites had red emitting light and magnetism, which would be applied in biology and medicine fields potentially.