Abstract
Effects of hydrothermal treatments (HTT) have been investigated on the merocyanine (MS) - Cd arachidate mixed Langmuir-Blodgett (LB) films. The as-deposited J-band is reorganized by HTT under the 100%-humidity condition in the range 30-90oC, forming a new phase with spectra sharper than those before HTT. The spectra after HTT can be deconvoluted into Bands I and II, Gaussian-type centered at 5I5 nm and 555 nm, respectively, and Band III, the remainder identifiable with the J-band with its peak at 590-600 nm. The relative fraction of oscillator strength of Band II is insensitive to both time tH and temperature TH of HTT. The Band-III and Band-I fractions are approximated by exponential saturation and decay functions of tH when TH=const, and by sigmoid and inverse-sigmoid functions of TH when tH=const, respectively. These suggest that the reorganization process is described as a first-order reaction between Band-I and Band-III components.
