Multilayer mixed films of cadmium stearate (SC) containing perylene-4-
octadecanon (PO) with long chain C17H35 were prepared by the Langmuir-
Blodgett technique. By itself, PO was found to form good Langmuir Blod
gett films because it was possible to produce high quality multilayers
. The molar ratios of PO to SC were varied from 1.5% up to 100%. Using
the time-correlated single-photon counting technique and fluorescence
spectroscopy, evidence of dimer formation of PO molecules in Langmuir
Blodgett films was obtained.