Where D is the crystalline size, K is the shape factor which can be assigned a value of 0.89, if the shape is unknown, and is the full width at half maximum of the diffraction angle in radians. When applied to the sharp peak Eq. (1) leads to the average crystallite size of about 45 nm for n- CuPT. The structural ordering of PT was significantly improved on the micro and nano composite. The improved crystallinity in the micro and nano composites is due to the incorporation of micro and nano copper particles in the conducting polymer PT matrix. This is evident from the sharp peaks which are shown in the XRD peaks of -CuPT and n-CuPT.