Investigation of Structural and Electrical Properties of Polyaniline/Gold Nanocomposites
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- 作者：Asma B. Afzal ; M. Javed Akhtar ; Muhammad Nadeem ; M. M. Hassan
- 刊名：Journal of Physical Chemistry C
- 出版年：2009
- 出版时间：October 8, 2009
- 年：2009
- 卷：113
- 期：40
- 页码：17560-17565
- 全文大小：283K
- 年卷期：v.113,no.40(October 8, 2009)
- ISSN：1932-7455
文摘
Gold nanoparticles are synthesized by the reduction of gold salt using extract of tea leaves in 1-methyl-2-pyrrolidinone (NMP) solution. Transmission electron microscopy (TEM) confirmed the formation of gold nanoparticles having average size of 20 nm. These nanoparticles have been incorporated in NMP solution of polyaniline emeraldine base (PANIEB) to cast the nanocomposite films. Thermogravimetric analysis (TGA) revealed that the thermal stability of the nanocomposites has improved as compared to the pure PANI. TEM confirmed the presence of gold nanoparticles in polyaniline matrix. The impedance spectroscopic studies showed that gold nanoparticles have considerable effects on the electrical properties of PANI by reducing the charge trapping centers and increasing conducting channels, which causes substantial decrease in the real part of impedance.