Low-Frequency Dependence of Conductivity and Dielectric Properties of Polyaniline/ZnFe2O4 Nanocomposites

被引：7

作者：

Prasanna, G. D. ^{[1
]}

Jayanna, H. S. ^{[1
]}

Lamani, Ashok R. ^{[1
]}

Dinesha, M. L. ^{[1
]}

Naveen, C. S. ^{[1
]}

Shankaramurthy, G. J. ^{[2
]}

机构：

[1] Kuvempu Univ, Dept PG Studies & Res Phys, Shankarghatta 577451, Karnataka, India

[2] Bapuji Inst Engn & Technol, Davangere 577004, Karnataka, India

来源：

CHINESE PHYSICS LETTERS | 2011年 / 28卷 / 11期

关键词：

COMBUSTION SYNTHESIS; MAGNETIC-PROPERTIES; FERRITE; SPECTROSCOPY; TRANSPORT;

D O I：

10.1088/0256-307X/28/11/117701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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 (sigma(ac)) 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.

引用

页数：4

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