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Characterization of fluorescent tannic acid/iron particles produced by coprecipitating the tannic acid/iron complex with a hydrophobic fluorescent dye, EtTP-5. (a) Coprecipitation with dye does not significantly affect particle size or size distribution measured by dynamic light scattering (b) UV absorbance shows absorbance peaks due to the presence of the EtTP-5 and (c) fluorescence spectra show emission peaks at 635 nm and 695 nm when excited at 460 nm due to presence of EtTP-5.
