Study of conjugated polymer blend films by a near field scanning optical microscopy

A dual color (400nm and 500nm wavelengths) near-field optical microscope (NSOM) was used to study the blend films, made by conjugated polymers, PPV copolymer and PdOPV. These blend films were found to undergo spinodal decomposition with the domain sizes ranging from 100–500nm. The topographic and NSOM images lost correspondence when the degree of decomposition is small