Absorption and fluorescence mechanisms of red mega 480 laser dye coupled with silver nanoparticles

Herein, we used the chemical reduction method to synthesize silver nanoparticles. The characterization of synthesized particles is done using UV-Vis, SEM, and TEM techniques, which reveal sizes in the range of 4–12 nm. In this particular instance, the optical absorption spectra of synthesized silver nanoparticles produced a maximal spike in the 400–410 nm region. This spike is attributed to surface plasmon resonance. The spectra of emission and absorption intensities of the exceptionally brilliant laser Red Mega 480 dye in alcohol solvents with the addition of silver nanoparticles indicate quenching. This is related to the size, shape, and transfer of energy between silver nanoparticles and dye. The quenching of fluorescence intensity in the presence of nanoparticles with Red Mega 480 dye leads to advancements in biomolecular labeling, printing technology, 3D graphics, glossy painting, fluorescence patterning, and cancer treatment. (author)