Fabrication of Highly Rough Ag Nanobud Substrates and Surface-Enhanced Raman Scattering of 𝝀-DNA Molecules

Figure 3

Preparation of λ-DNA samples on AgNB substrates. As-grown AgNBs were fixed on a clean slide as the SERS substrate, and then a 10 μL drop of λ-DNA water solution was added onto the AgNBs, thereafter a clean 24 mm × 24 mm coverslip of 0.17 mm thickness was placed on the slide to seal the λ-DNA solution. The incident laser was directed vertically down for the analysis.