磁性Fe_3O_4@YVO_4:Eu纳米荧光材料的合成及其显现潜指纹性能的研究

Synthesis of Fe_3O_4@YVO_4:Eu magnetic fluorescent nanomaterials and its performance for latent fingerprint development

采用水热法合成Fe_3O_4@YVO_4:Eu磁性纳米荧光材料,利用透射电子显微镜(TEM)、X射线衍射仪(XRD)和荧光光谱仪(FS)对合成的材料进行微观形貌、结构和荧光光谱表征。合成的Fe_3O_4@YVO_4:Eu磁性纳米荧光材料具有核壳结构,平均粒径为40nm。随n(Fe_3O_4):n(YVO_4:Eu)的减小,发射光谱中Eu^(3+)离子的特征发射峰有所增强,材料的磁性有所减弱。结果表明,使用制备的Fe_3O_4@YVO_4:Eu磁性纳米材料显现潜指纹,具有背景干扰低、清晰度高、适用性强、环境污染小等特点,在公安技术领域应用前景广阔。

In this study,Fe_3O_4@YVO_4:Eu magnetic nanomaterials were synthesized by hydro-thermal method.The shape,phase and fluorescent properties of the magnetic nanomaterials were characterized by transmission electron microscopy(TEM),X-ray diffraction(XRD)and fluorescence spectrophotometer(FS),respectively.Fe_3O_4@YVO_4:Eu magnetic nanomaterials are core-shell structure,with 40 nm grain diameter in average.Following the decrease of n(Fe_3O_4):n(YVO_4:Eu),the character peaks of Eu^(3+)ion are increased,while the magnetism of Fe_3O_4@YVO_4:Eu nanomaterials are decreased.The results show that the Fe_3O_4@YVO_4:Eu magnetic nanomaterials have some significant advantages in latent fingerprint development,such as low background interference,high developing contrast,wide application range of substrates,and low pollution.Therefore,the Fe_3O_4@YVO_4:Eu magnetic nanomaterials have been proved to be an ideal material for latent fingerprint development,with widely use in public security techno-sphere.