INHOMOGENEOUS AGGREGATION OF A MEROCYANINE DYE AT THE SOLID-LIQUID INTERFACE LAYER - A PICOSECOND TIME-RESOLVED TOTAL INTERNAL-REFLECTION FLUORESCENCE STUDY

Fluorescence spectra and their rise and decay dynamics of a merocyanine dye in the interface layer have been studied as a function of penetration depth of the evanescent wave intensity by total internal reflection fluorescence spectroscopy. The aggregation of the dye was enhanced in the interface layer of up to almost-equal-to 100 nm thickness compared to the bulk solution.