Research Article
Preparation of Surface-Enhanced Raman Scattering Substrates Based on Immobilized Silver-Capped Nanoparticles
Figure 5
Surface-enhanced Raman scattering spectra of a rhodamine 6G 10−3 M solution recorded at 785 nm on sensors composed by Ag@polyvinylpyrrolidone-29000 (a), Ag@polyvinylpyrrolidone-10000 (b), and Ag(H) (c). Main Raman bands of rhodamine 6G are labeled from A to F (see text for details and assignation to molecular vibrations). (d) A zoom of two of the most prominent bands is shown for quantitative comparison of their Raman intensity normalized with the area of the Ag-Cl stretching band.