采用二步电沉积方法在Ti片表面制备了Au-氧化石墨烯(Au-GO)复合薄膜,通过XRD、SEM、XPS等对薄膜的组成、结构和形貌进行了表征,并以罗丹明6G(R6G)为探针分子,对Au-GO/Ti基底的SERS活性进行了表征。结果显示,Au纳米颗粒尺寸约为60 nm,均匀、致密分布于GO表面,该基底显示出较高的SERS活性,对R6G分子的检测极限可达~10~(-1)0 mol·L~(-1),增强因子高达约106,且基底显示出良好的稳定性,在冰箱中存放90 d后,SERS活性仅降低30%左右。 The Au-GO composite film was prepared on the surface of Ti by two-step electrodeposition method. The composition, structure and morphology of the film were characterized by XRD, SEM and XPS. Rhodamine 6G (R6G) as probe molecule, the SERS activity of Au-GO / Ti substrate was characterized. The results showed that the size of Au nanoparticles was about 60 nm, uniformly and densely distributed on the GO surface, which showed a high SERS activity. The detection limit of R6G molecules was about 10 ~ (-1) 0 mol·L ~ (-1), the enhancement factor was up to about 106, and the substrate showed good stability. SERS activity was reduced by only about 30% after stored for 90 days in the refrigerator.