Figure 9From: Self-assembly of gold nanoparticles to silver microspheres as highly efficient 3D SERS substratesSERS spectra of 2-Mpy molecules on the assembled substrates of AgMSs to GNPs. (a) Representative SERS spectra of 2-Mpy (10−7 M) on the assembled substrates at different AgMSs to GNPs molar ratios. (b) The corresponding enhancement of the assembled substrates compared with 2-Mpy on pure AgMSs.Back to article page