Effect of silver nanoparticles on the spectral luminescent properties of a gelatin film

We studied the absorption and fluorescence spectra of a rhodamine 6G-activated gelatin film of thickness 10 µm, with and without silver nanoparticles. We observed that doping the film with nanoparticles of diameter 5 nm leads to an increase in the intensity of the absorption spectrum by a factor of 1.17 and its short-wavelength shift (~1.5 nm), while the intensity of the fluorescence spectrum increases by a factor of ~2.