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45~60nm,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544nm附近的Tb3+的5 D4→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。
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 45-60nm,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 544nm which is corresponding to 5 D4→7F5transition of Tb3+,Ag core quenches the luminescence of CeF3:Tb3+.This functional AgSiO2-CeF3:Tb3+ composites would be potentially applied in biology detection and disease therapy fields.