Abstract
The magnetic properties of the neutral and doped polymer polypyrrole (Ppy) nanostructure has been successfully synthesize via chemical method. The nanostructured powder was investigated using electron spin resonance (ESR) measurements. The board ESR signal was attributed to the existence of unpaired electrons. The g-factor of pure Ppy decreased with increasing temperature while that of doped (Ppy) was found to increase linearly from 1.9504 to 1.9925 within a temperature range of 298K - 473 K. This could be due to polaron species formation. The current results demonstrated that polypyrrole (Ppy) could be considered as a good candidate for many applications especially in organic photovoltaic and gas sensors.