▎ 摘　　要

Two-step electrodeposition process was developed to prepare Au nanoparticle-graphene oxide (Au-GO) hybrid film as large-area surface-enhanced Raman scattering (SERS) substrates. The composition, microstructure and morphology of the resultant hybrid film were characterized by XRD, SEM and XPS. Meanwhile, SERS activity of the Au-GO/Ti substrates was also evaluated using rhodamine 6G (R6G) as probe molecules. The results showed that Au nanoparticles with an average size of similar to 60 nm were uniformly deposited on the surface of GO. The substrates exhibited strong and uniform SERS response toward R6G with a detection limit of similar to 10(-10) mol.L-1 and an enhancement factor of similar to 10(6). Furthermore, the Raman signal intensity of R6G only decreased to approximately 30% of its initial value after 90 days of storage, indicating the Au-GO/Ti substrate is highly stable and produces reliable SERS measurements