IN-SITU DEPOSITED THIN-FILMS OF POLYPYRROLE - CONFORMATIONAL-CHANGES INDUCED BY VARIATION OF DOPANT AND SUBSTRATE SURFACE

Thin films of polypyrrole (PPY) were deposited in-situ from aqueous po lymerizing solutions of pyrrole onto the surface of various substrates . A relationship between the structure of the dopant ion, conductivity , and optical absorption in the near IR was observed. The changes in c onductivity and spectra are related to molecular conformational change s of polypyrrole. Conductivity and adhesion could be optimized by tuni ng the hydrophobicity of substrate surface. Thickness and morphology o f deposited films were determined by Atomic Force Microscopy (AFM) [1] . AFM images showed that the films consist of fused globular particles .