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Physical characterizations of semi-conducting conjugated polymer-CNTs nanocomposites

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Abstract

Carbon nanotubes (CNTs) were prepared using Alcholic Catalyst Chemical Vapor Deposition (ACCVD) technique in order to investigate the effects of their addition on the optical, electrical and mechanical properties of Poly(3-octylthiophene-2,5-diyl) (P3OT) matrix. The absorption spectra of the prepared CNTs and CNT-P3OT nanocomposites were measured in the spectral range 200 nm–3,000 nm at room temperature. The optical energy gap was determined from the obtained UV/Vis absorption spectrum. Optical results reveal that the prepared CNTs are almost single walled. Besides, the addition of CNTs to P3OT polymer matrix will decrease the optical energy gap and enhance the optical absorbance of P3OT matrix. On the other hand, the addition of CNTs to P3OT matrix will increase the electrical conductivity of P3OT matrix up to four orders of magnitude above the percolation threshold (0.44 wt% CNTs). Additionally, I–V characteristics indicate that the conduction mechanism is Ohmic at low applied voltage range while it is due to the trap charge limited at high applied voltage range. Furthermore, the behavior of dc conductivity with temperature was also investigated and the obtained results reveal that the activation energy decreases with CNTs content. Finally, mechanical results reveal that the elastic modulus values increase with the increasing of CNTs content in P3OT matrix.

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Acknowledgements

The authors acknowledge the King Abdelaziz City for Science and Technology (KACST), Saudi Arabia for funding and providing the facilities required for this investigation.

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Authors and Affiliations

  1. Department of Physics, College of Science, King Faisal University, P.O.B 400, 31982, Al-Ahsa, KSA

    M. Abu-Abdeen, Ayman S. Ayesh & Abdullah A. Al Jaafari

  2. Department of Physics, College of Science, Cairo University, Giza, Egypt

    M. Abu-Abdeen

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  1. M. Abu-Abdeen
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  2. Ayman S. Ayesh
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  3. Abdullah A. Al Jaafari
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Correspondence to Ayman S. Ayesh.

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Abu-Abdeen, M., Ayesh, A.S. & Al Jaafari, A.A. Physical characterizations of semi-conducting conjugated polymer-CNTs nanocomposites. J Polym Res 19, 9839 (2012). https://doi.org/10.1007/s10965-012-9839-z

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