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.
[1] Ashis Dey, Sukanta De, Amitabha De and S K De 2004 Nanotechnology 15 1277
[2] Skothemin T and Elsenbaumer R 1998 Handbook of Conducting Polymers (New York: Dekker)
[3] Salafsky J S 1999 Phys. Rev. B 59 10885
[4] Su S J, Kuramoto N 2000 Synth. Met. 114 147
[5] Zhang L J and Wan M X 2003 J. Phys. Chem. B 107 6748
[6] Mathai C J, Saravanan S, Anantharaman M R, Venkitachalam S and Jayalekshmi S 2002 J. Phys. D: Appl. Phys. 35 240
[7] Faez R, Martin I M De Paoli M A and Rezedene M C 2001 Synth Met. 119 435
[8] Manjunath S, Koppalkar R Anilkumar, Revanasiddappa M and Ambika Prasad M V N 2008 Ferroelect. Lett. 35 36
[9] Manjunath S, Koppalkar R Anilkumar and Ambika Prasad M V N 2008 Ferroelectrics 366 22
[10] Shantala D Patil, Raghavendra S C, Revansiddappa M, Narsimha P and Ambika Prasad M V N 2007 Bull. Mater. Sci. 30 89
[11] Javed Alam, Ufana Riaz and Sharif Ahmad 2007 J. Magn. Magn. Mater. 314 93
[12] Vishnuvardhan T K, Kulkarni V R, Basavaraja C and Raghavendra S C 2006 Bull. Mater. Sci. 29 77
[13] Jiang J and Ai L H 2008 J. Macromol. Sci. B: Phys. 47 620
[14] Raghavendra S C et al 2003 Bull. Mater. Sci. 26 733
[15] Gun'ko Y K, Pillai S C and McInerney D 2001 J. Mater. Sci. 12 299
[16] Hwang C C et al 2004 Mater. Sci. Eng. B 111 49
[17] Zhang R J et al 2007 Energy Fuel. 21 2682
[18] Stejskal J 2002 Pure Appl. Chem. 74 857
[19] Prasanna G D, Jayanna H S and Prasad V 2011 J. Appl. Poly. Sci. 120 2856
[20] Kong L B, Li Z W, Lin G Q and Gan Y B 2007 Acta Mater. 55 6561
[21] Ahmad N and MacDiarmid A G 1996 Synth. Met. 78 103
[22] Li G J et al 2006 Colld. Surf A: Physicochem. Eng. Aspects 276 40
[23] Prasanna G D and Jayanna H S 2011 J. Adv. Dielect. 1(3) 1
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