Surface-enhanced Raman scattering (SERS) spectra of three kinds of azo-dye molecules on silver nanoparticles prepared by electrolysis

► Silver nanoparticles were made by electrolysis method. ► The SERS spectra of three kinds of Azo-dye molecules were gained. ► The SERS spectra these Azo-dye molecules were calculated by Gauss'98 software.