TY - JOUR
T1 - Electrical conductivity of polyazomethine nanocomposites
AU - Tripathi, Sandeep M.
AU - Tiwari, Devendra
AU - Ray, Arabinda
PY - 2014/12/1
Y1 - 2014/12/1
N2 - Nanocomposites of polyazomethines have been prepared via in situ and ex situ addition of Ag and PbS nanoparticles. Structural characterization of nanocomposites by X-ray diffraction shows formation of pure nanocrystalline Ag and PbS with cubic structure. Transmission electron microscopy gives evidence for spherical nanoparticles distributed homogenously within the polymer matrix. Electrical measurements show a significant increase in conductivity in some of the nanocomposites with respect to the virgin polymers. Infrared spectroscopy reveals strong interaction between the nanoparticles and polymers in these nanocomposites. Finally, a theoretical model based on PM6 molecular orbital calculations to explain the observed changes in the electrical conductivities is suggested. It is concluded that increase in electrical conductivity is governed by strong interaction between the polymer and the inorganic nanoparticles, resulting in considerable decrease of energy difference between the highest occupied molecular orbital and lowest unoccupied molecular orbital.
AB - Nanocomposites of polyazomethines have been prepared via in situ and ex situ addition of Ag and PbS nanoparticles. Structural characterization of nanocomposites by X-ray diffraction shows formation of pure nanocrystalline Ag and PbS with cubic structure. Transmission electron microscopy gives evidence for spherical nanoparticles distributed homogenously within the polymer matrix. Electrical measurements show a significant increase in conductivity in some of the nanocomposites with respect to the virgin polymers. Infrared spectroscopy reveals strong interaction between the nanoparticles and polymers in these nanocomposites. Finally, a theoretical model based on PM6 molecular orbital calculations to explain the observed changes in the electrical conductivities is suggested. It is concluded that increase in electrical conductivity is governed by strong interaction between the polymer and the inorganic nanoparticles, resulting in considerable decrease of energy difference between the highest occupied molecular orbital and lowest unoccupied molecular orbital.
KW - Polymer nanocomposites
KW - Composites
KW - Nanocomposites
KW - Molecular orbital calculations
KW - Vibrational spectroscopy
KW - Electrical conductivity
M3 - Article
SN - 0376-4710
VL - 53
SP - 1505
EP - 1512
JO - Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry
JF - Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry
IS - 12
ER -