Phase transition between different J-aggregate states of amphiphilic merocyanine dye molecules

The two-dimensional phase transition between different J-aggregate states in the amphiphilic merocyanine dye monolayer was investigated using a multi-purpose nonlinear optical microscope. Precise in-situ observations of the transition on cooling revealed the nucleation and growth process of the low temperature phase in the matrix of high temperature phase. (C) 2002 Elsevier Science B.V. All rights reserved.