Fe304／Au复合纳米材料的制备及SERS研究

Preparation and SERS of Fe3O4/Au Nanocomposites Properties

采用化学共沉淀法制备Fe3O4，通过对Fe3O4的表面处理后，将纳米金组装在Fe3O4表面，制备Fe3O4／Au复合磁性纳米材料。利用透射电子显微镜（TEM）对复合磁性纳米材料的形貌进行了表征，通过紫外一可见吸收光谱和拉曼光谱仪对磁性纳米材料的表面增强拉曼散射光谱进行表征研究，采用铷硼磁铁对磁性纳米材料的磁性进行初步研究。实验结果表明：复合磁性纳米颗粒既具有磁性又具有贵金属光谱特性；纳米金能很好地改善Fe3O4磁性纳米颗粒的表面增强拉曼散射活性。

Fe304 nanoparticles were prepared by co--precipitation method, gold nanoparticles were self--assembled on the surface of Fe3 04 by treatment the surface of Fe3 04 for Fe3 O4/Au. The nanoparticles were characterized by transmission e- lectron microscopy （TEM） . The spectra of the spectral characteristics by UV--visible absorption spectrum, and Surface En- hanced Raman Scattering spectra of crystal violet on magnetic nanoparticles. And the study the magnetic nanometer magnetic materials by rubidium boron magnet. Studies have shown that the composite magnetic nanoparticles have magnetic and spectral characteristics of precious metals. The AuNPs can improve the Surface Enhanced Raman Scattering activity of Fe3 04 magnetic nanoparticles.