Fluorescence from Dyes Adsorbed on Organic Nanoparticles

We studied fluorescence from dyes adsorbed on organic nanoparticles. Nanoparticles of 1,4-bis(2-methylstyryl)benzene (bis-MSB) were made by a reprecipitation method. Fluorescent dyes, rhodamine 6G, rhodamine 640, and coumarin 153, were used to adsorb on nanoparticles of bis-MSB. Nanoparticles of bis-MSB were excited by ultraviolet light to measure fluorescence spectra. Adsorption of fluorescent dye on the nanoparticles reduced the fluorescence from bis-MSB nanoparticles, and fluorescence of adsorbed dye appeared. However, large amount of fluorescent dye reduced the fluorescence of adsorbed dye.