Synthesis, characterization, electrical and thermal properties of nanocomposite of polythiophene with nanophotoadduct: a potent composite for electronic use

  • Mohd. Hanief Najar
  • Kowsar MajidEmail author


Materials having high thermal stability and electrical conductivity form potential candidates for electronics. In this study, a thermally stable nanocomposite of nanophotoadduct of pentaamminechlorocobalt(III) chloride with hexamine and polythiophene (PTh) was prepared by oxidative chemical polymerization in the presence of FeCl3 as oxidant and thiophene monomer. Photoadduct was obtained by photoirradiation followed by substitution with hexamine ligand which was then milled in G5 planetary ball mill to obtain nanophotoadduct which is confirmed by X-ray powder diffraction. The formation of nanophotoadduct and its incorporation in PTh structure was endorsed by fourier transform infrared analysis. Empirical formula of the nanophotoadduct was found to be [Co(NH3)2(OH)3C6H12N4]·2H2O. SEM analysis revealed uniform distribution of nanophotoadduct in PTh matrix. Crystallite size and strain analysis revealed further decrease in size from 34 (nanophotoadduct) to 15 nm (nanocomposite) using different methods of analysis which were well correlated. This size reduction was attributed to the microstrain in the nanocomposite. TG revealed that the nanocomposite and PTh underwent 62 and 80 % weight loss at 1,000 °C respectively which clearly indicated the higher thermal stability of nanocomposite compared to pure PTh. Little change in the glass transition temperatures of PTh (170 °C) and nanocomposite (167 °C) is observed from DSC which indicated smaller plasticizing effect of nanophotoadduct. I–V curves of nanophotoadduct showed its diode like behavior while as nanocomposite depict nearly ohmic behavior. These results illustrate that the nanophotoadduct play two important roles, one that it acts as a Schottky diode material and second that it increases the conductance and thermal stability of PTh. Nanocomposite thus obtained can operate at relatively high temperatures in electrical appliances.


Crystallite Size Lattice Strain Transition Metal Complex Schottky Diode Lattice Water 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors are grateful to Department of Science and Technology, Government of India for financial assistance to carry out this research work under research Project No. SR/NM/NS-97/2008. The authors are also grateful to Prof. Rajat Gupta, Director, NIT Srinagar for help and support.


  1. 1.
    C.O. Yoon, H.K. Sung, Synth. Met. 99, 201 (1999)CrossRefGoogle Scholar
  2. 2.
    A.L. Briseno, T.W. Holcombe, A.I. Boukai, E.C. Garnett, S.W. Shelton, J.J.M. Frechet, P. Yang, Nano Lett. 10, 334 (2009)CrossRefGoogle Scholar
  3. 3.
    A.R. Murphy, J.M.J. Frechet, P. Chang, J. Lee, V. Subramanian, J. Am. Chem. Soc. 126, 1596 (2004)CrossRefGoogle Scholar
  4. 4.
    B.S. Ong, Y. Wu, P. Liu, S. Gardner, J. Am. Chem. Soc. 126, 3378 (2004)CrossRefGoogle Scholar
  5. 5.
    J.K. Koh, J. Kim, B. Kim, J.H. Kim, E. Kim, Adv. Mater. 23, 1641 (2011)CrossRefGoogle Scholar
  6. 6.
    K. Shankar, G.K. Mor, H.E. Prakasam, O.K. Varghese, C.A. Grimes, Langmuir 23, 12445 (2007)CrossRefGoogle Scholar
  7. 7.
    G. Gustafsson, G.M. Treacy, Y. Cao, A.J. Heeger, Synth. Met. 4124, 55 (1993)Google Scholar
  8. 8.
    H. Koezuka, A. Tsumura, Synth. Met. 28, C-753 (1989)CrossRefGoogle Scholar
  9. 9.
    X. Ma, G. Li, H. Xu, M. Wang, H. Chen, Thin Solid Films 515, 2700 (2006)CrossRefGoogle Scholar
  10. 10.
    A.K. Narula, R.J. Singh, App. Bioc. & Biot. 96, 109 (2001)CrossRefGoogle Scholar
  11. 11.
    O. Yu Posudievskii, N.V. Konoshchuk, A.L. Kukla, A.S. Pavlyuchenko, G.V. Linyuchev, V.D. Pokhodenko, Thero. Exp. Chem. 42, 339 (2006)CrossRefGoogle Scholar
  12. 12.
    K. Fanhong, W. Yan, Z. Jun, X. Huijuan, Z. Baolin, W. Yanmei et al., Mater. Sci. Eng. B 150, 6 (2008)CrossRefGoogle Scholar
  13. 13.
    B. Nirmala, B. Mulkul, Mater. Sci. Eng. B 129, 270 (2006)CrossRefGoogle Scholar
  14. 14.
    I.A. Syed, M. Kowsar, Therchem. Acta 311, 173 (1998)CrossRefGoogle Scholar
  15. 15.
    I.A. Syed, M. Kowsar, Transit. Met. Chem. 22, 309 (1997)CrossRefGoogle Scholar
  16. 16.
    I.A. Syed, M. Kowsar, J. Therm. Anal. 58, 153 (1999)CrossRefGoogle Scholar
  17. 17.
    M.S. Rather, K. Majid, R.K. Wanchoo, M.L. Singla, J. Therm. Anal. Calorim. 10, 7 (2013)Google Scholar
  18. 18.
    K. Majid, R. Tabassum, A.F. Shah, S. Ahmad, M.L. Singla, J. Mater. Sci. Mater. Electron. 20, 958 (2009)CrossRefGoogle Scholar
  19. 19.
    D.H. Kim, J.T. Han, Y.D. Park, Y. Jang, J.H. Cho, M. Hwang, K. Cho, Adv. Mater. 18, 719 (2006)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Department of ChemistryNational Institute of Technology Srinagar, HazratbalSrinagarIndia

Personalised recommendations