Electron Transport in Conductive-Polymer Nanocomposites

It has been reported that the electrical conductivity strongly depends on the ordered states of the conductive polymer [86]. In other words, the structural and electronic properties of PPy can be easily modified due to the soft lattices, which are reflected in the crystalline structure of the nanomaterials. Iron oxide nanoparticles were thought to serve as a template for the subsequent PPy matrix formation. Ultrasonic energy has been reported to have a strong capabUity to alter the electronic structure of the polymer or even produce various nanoparticles. Here, the crystalline structure change with the nanocomposite formation was investigated by selected-area electron diffraction (SAED) and dark-field TEM microstructures. 

This explains the phenomenon of the characteristic Mott temperature of nanocomposite with a 20 wt% particle loading decreasing and then increasing again with 50 wt% loading. 

Material name Resistivity at 10 K (ohm.cm) Resistivity at 290 K(ohm.cm) Lattice constant of PPy(nm) Final particle loading) wt %)  

Nanocomposite SO wt% (seven hour mechanical stirring) Infinite Infinite Amorphous 0 

Granular polymer nanocomposites have also been investigated for possible GMR applications [43,96]. Conductive iron nanoparticle-reinforced vinyl ester resin nanocomposites are observed to possess MRs of only 0.9%, which increase to 1.7% after 

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