Enhancement of fluorescence and Raman scattering in cyanine-dye molecules on the surface of silicon-coated silver nanoparticles

A method of formation of a composite structure based on silver nanoparticles and a thin protective silicon film (Ag NPs /Si) is developed. Enhancement of the fluorescence and Raman scattering in cyaninedye molecules deposited onto the formed nanostructure is observed. The optical properties and morphology stability of particles that are in contact with cyanine-dye solutions in organic solvents are studied. It is shown that the Ag NPs /Si composite structure can be multiply used as an SERS-active surface.