Low-Frequency Dependence of Conductivity and Dielectric Properties of Polyaniline/ZnFe2O4 Nanocomposites
G. D. Prasanna1, H. S. Jayanna1*, Ashok R Lamani1, M. L. Dinesha1, C. S. Naveen1, G. J. Shankaramurthy2
1Department of PG Studies and Research in Physics, Kuvempu University, Shankarghatta-577 451, Karnataka, India 2Bapuji Institute of Engineering and Technology, Davangere-577 004, Karnataka, India
Low-Frequency Dependence of Conductivity and Dielectric Properties of Polyaniline/ZnFe2O4 Nanocomposites
G. D. Prasanna1, H. S. Jayanna1*, Ashok R Lamani1, M. L. Dinesha1, C. S. Naveen1, G. J. Shankaramurthy2
1Department of PG Studies and Research in Physics, Kuvempu University, Shankarghatta-577 451, Karnataka, India 2Bapuji Institute of Engineering and Technology, Davangere-577 004, Karnataka, India
摘要Conducting polyaniline/ZnFe2O4 nanocomposites are synthesized by using a simple and inexpensive one−step in-situ polymerization method in the presence of ZnFe2O4 nanoparticles. The structural, morphological and electrical properties of the samples are characterized by x−ray diffraction, Fourier transform infrared spectra and scanning electron microscopy. These results reveal the formation of polyaniline/ZnFe2O4 nanocomposites. The morphology of these samples is studied by scanning electron microscopy. Further, the ac conductivity (σac ) of these composites is investigated in the frequency range of 1 kHz–10 MHz. The presence of polarons and bipolarons are responsible for the frequency dependence of ac conductivity in these nanocomposites. The ac conductivity is found to be constant up to 1 MHz and thereafter it increases steeply. The ac conductivity of 0.695 S⋅cm−1 at room temperature is observed as the maxima for the polyaniline with 40wt% of the ZnFe2O4 nanocomposite.
Abstract:Conducting polyaniline/ZnFe2O4 nanocomposites are synthesized by using a simple and inexpensive one−step in-situ polymerization method in the presence of ZnFe2O4 nanoparticles. The structural, morphological and electrical properties of the samples are characterized by x−ray diffraction, Fourier transform infrared spectra and scanning electron microscopy. These results reveal the formation of polyaniline/ZnFe2O4 nanocomposites. The morphology of these samples is studied by scanning electron microscopy. Further, the ac conductivity (σac ) of these composites is investigated in the frequency range of 1 kHz–10 MHz. The presence of polarons and bipolarons are responsible for the frequency dependence of ac conductivity in these nanocomposites. The ac conductivity is found to be constant up to 1 MHz and thereafter it increases steeply. The ac conductivity of 0.695 S⋅cm−1 at room temperature is observed as the maxima for the polyaniline with 40wt% of the ZnFe2O4 nanocomposite.
G. D. Prasanna;H. S. Jayanna*;Ashok R Lamani;M. L. Dinesha;C. S. Naveen;G. J. Shankaramurthy
. Low-Frequency Dependence of Conductivity and Dielectric Properties of Polyaniline/ZnFe2O4 Nanocomposites[J]. 中国物理快报, 2011, 28(11): 117701-117701.
G. D. Prasanna, H. S. Jayanna*, Ashok R Lamani, M. L. Dinesha, C. S. Naveen, G. J. Shankaramurthy
. Low-Frequency Dependence of Conductivity and Dielectric Properties of Polyaniline/ZnFe2O4 Nanocomposites. Chin. Phys. Lett., 2011, 28(11): 117701-117701.
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