Figure 7From: Self-assembly of gold nanoparticles to silver microspheres as highly efficient 3D SERS substratesAssemblies of AgMSs and GNPs detected by a UV–vis spectrophotometer. (a) UV–vis spectra of AgMSs and GNPs; (b) UV–vis spectra of the assemblies prepared at different molar ratios of AgMSs to GNPs.Back to article page