X-RAY STUDIES OF DOPED POLYANILINE FILMS

Doping and complexation of polyaniline (PANI) and dodecyl benzenesulfo nic acid (DBSA) in xylene was conducted at various temperatures, As ca st and isothermally treated films were examined by the wide angle X-ra y scattering. Results of transmission and reflection techniques reveal ed that the complexation led to form a layered structure. The layered structure was also found oriented that the PANI and DBSA are stacked o ne another across the film thickness. The anisotropic feature of the l ayered structure was independent of the mixing temperatures but change d by the successive isothermal treatments. A model structure similar t o smectic A was proposed to account for the very large layer spacing o f 3.3 nm and the close packing of 0.35 nm between the PANI units withi n the layer.