Preparation and luminescent properties of Ag-SiO2-CeF3：Tb3+ composite nanoparticles
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摘要: 采用简单的液相法在室温下制备了均匀球形的Ag-SiO2-CeF3：Tb3+核-壳结构纳米复合发光粒子，并对其结构和性能进行了表征。测试结果表明：Ag-SiO2表面包覆上了结晶良好的六方晶系的CeF3：Tb3+。Ag-SiO2-CeF3：Tb3+纳米复合粒子为球形，尺寸约为45~60 nm，该纳米复合粒子与CeF3：Tb3+一样具有良好的特征绿光发射，均以544 nm附近的Tb3+的5D4→7F5跃迁为最强发射峰，内核贵金属Ag纳米粒子对CeF3：Tb3+发光起到了一定的猝灭作用。Ag-SiO2-CeF3：Tb3+复合材料在生物检测、疾病治疗方面具有潜在的应用。Abstract: Core-shell structure Ag-SiO2-CeF3:Tb3+ composite luminescent nanoparticles are fabricated via a simple liquid method at room temperature, the structure and properties are characterized. The results show that orthogonal phase CeF3:Tb3+ nanocrystals are coated on the surface of Ag-SiO2. The obtained Ag-SiO2-CeF3:Tb3+composites have spherical morphology, the size is about 45-60 nm, and the surface is tough. Their photoluminescence properties show to be the same as those of the pure CeF3:Tb3+, and the strong emission peak is near 544 nm which is corresponding to 5D4→7F5 transition of Tb3+, Ag core quenches the luminescence of CeF3:Tb3+. This functional Ag-SiO2-CeF3:Tb3+composites would be potentially applied in biology detection and disease therapy fields.
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Keywords:
- Ag /
- CeF3：Tb3+ /
- Core-shell structure /
- Nanoparticles /
- Luminescent property
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