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http://dx.doi.org/10.5012/bkcs.2009.30.11.2701

Transport Properties of Polypyrrole Films Doped with Sulphonic Acids  

Basavaraja, C. (Department of Chemistry and Institute of Basic Sicence, Inje University)
Kim, Na-Ri (Department of Chemistry and Institute of Basic Sicence, Inje University)
Jo, Eun-Ae (Department of Chemistry and Institute of Basic Sicence, Inje University)
Pierson, R. (Department of Chemistry and Institute of Basic Sicence, Inje University)
Huh, Do-Sung (Department of Chemistry and Institute of Basic Sicence, Inje University)
Venkataraman, A. (Department of Materials Science, Gulbarga University)
Publication Information
Bulletin of the Korean Chemical Society / v.30, no.11, 2009 , pp. 2701-2706 More about this Journal
Abstract
The polymer blends containing polypyrrole (PPy) and the sulphonic acids such as β-naphthalene sulfonic acid (NSA), camphor sulfonic acid (CSA), and dodecylbenzenesulfonic acid (DBSA) were synthesized by in situ deposition technique in an aqueous media using ammonium per sulfate (APS) as an initiator. The obtained films were characterized by scanning electron microscopy (SEM), and the thermal behavior of these polymer blends was analyzed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The temperature-dependent (DC) conductivity of the obtained films shows a semiconducting behavior with a negative temperature coefficient of resistivity (TCR). The conductivity data were also analyzed through Mott’s equation, which provides the variable range hopping model in three dimensions. The parameters such as density of states at the Fermi energy, hopping energy, and hopping distance were calculated for PPy, PPy-NSA, PPy-CSA, and PPy-DBSA films, and the data were compared.
Keywords
Mott's equation; Polypyrrole; Sulphonic acids;
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