Electron paramagnetic resonance studies of dimensionality of polyaniline films

The line shape analysis of electron paramagnetic resonance (EPR) spectra fo r low-dimensional solids are calculated. A comparison is carried out betwee n the experimental EPR results of polyaniline samples and theoretical calcu lation. The dimension evolution of the samples from nonconducting to conduc ting states is obtained. It is found that the dimensional properties determ ined by EPR are in good accordance with those obtained using previous ellip sometric methods.