langmuir-Blodgett films of nile red: a steady-state and time-resolved fluorescence study

We report the behavior of nile red (NR) at the air-water interface and its incorporation in Langmuir-Blodgett (LB) films mixed with a fatty acid. We also report the first observation of dual fluorescence emission from organized NR aggregates formed in the LB films and in binary solvent mixtures that may be attributed to the co-existence of two distinctly different species, one planar and the other twisted conformations of the NR molecule.