SURFACE-STRUCTURE OF FREESTANDING POLYANILINE THIN-FILMS

The techniques of scanning tunneling microscopy and atomic force micro scopy were used to study the structure of chemically prepared free-sta nding polyaniline thin films in both their protonated and non-protonat ed forms. Both types of films were largely amorphous, with small regio ns exhibiting some degree of crystalline order in the protonated films . No nanometer-scale bundle structure was observed, in contrast to fil ms prepared by electrochemical means or by direct evaporation in high vacuum.