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• Bahrami, A
• Talib, Z
• Shahriari, E
• Yunus, W
• Kasim, A
• Behzad, K
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• Bahrami, A
• Talib, Z
• Shahriari, E
• Yunus, W
• Kasim, A
• Behzad, K
• [+] on PubMed
• Bahrami, A
• Talib, Z
• Shahriari, E
• Yunus, W
• Kasim, A
• Behzad, K

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Int. J. Mol. Sci. 2012, 13(1), 918-928; doi:10.3390/ijms13010918

Article

Characterization of Electrosynthesized Conjugated Polymer-Carbon Nanotube Composite: Optical Nonlinearity and Electrical Property

Afarin Bahrami ^1,2 , Zainal Abidin Talib ^1,* , Esmaeil Shahriari ¹ , Wan Mahmood Mat Yunus ¹ , Anuar Kasim ³  and Kasra Behzad ¹

¹ Department of Physics, Universiti Putra Malaysia, UPM, Serdang, Selangor, 43400, Malaysia ² Science Faculty, Islamic Azad University, Eslamshahr Branch, 3314767653, Iran ³ Department of Chemistry, Universiti Putra Malaysia, UPM, Serdang, Selangor, 43400, Malaysia

* Author to whom correspondence should be addressed.

Received: 23 October 2011 / Accepted: 19 December 2011 / Published: 16 January 2012

(This article belongs to the Section Material Sciences and Nanotechnology)

Download PDF Full-Text [1002 KB, uploaded 16 January 2012 15:48 CET]

Abstract: The effects of multi-walled carbon nanotube (MWNT) concentration on the structural, optical and electrical properties of conjugated polymer-carbon nanotube composite are discussed. Multi-walled carbon nanotube-polypyrrole nanocomposites were synthesized by electrochemical polymerization of monomers in the presence of different amounts of MWNTs using sodium dodecylbenzensulfonate (SDBS) as surfactant at room temperature and normal pressure. Field emission scanning electron microscopy (FESEM) indicates that the polymer is wrapped around the nanotubes. Measurement of the nonlinear refractive indices (n₂) and the nonlinear absorption (β) of the samples with different MWNT concentrations measurements were performed by a single Z-scan method using continuous wave (CW) laser beam excitation wavelength of λ = 532 nm. The results show that both nonlinear optical parameters increased with increasing the concentration of MWNTs. The third order nonlinear susceptibilities were also calculated and found to follow the same trend as n₂ and β. In addition, the conductivity of the composite film was found to increase rapidly with the increase in the MWNT concentration.

Keywords: conducting polymers; carbon nanotubes; optical properties; electrical characterization

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