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We report a facile method of improving thermopower of doped polyaniline (PANI). It is believed that the electrical properties were altered by controlling the concentration of charge carriers with camphor sulfonic acid (CSA) and ammonium hydroxide. With CSA doping followed by drying and annealing at temperatures below ∼100 °C, the electrical conductivity was increased up to ∼5700 S/m with a thermopower...
The polyaniline (PANI) nanocomposite films with an oriented alignment of γ-Fe2O3-nanoneedles were prepared for the first time via a facile solution evaporation method under an applied magnetic field. The γ-Fe2O3 nanoneedles were coated with PANI in advance to get the uniform dispersion of γ-Fe2O3 nanoneedles in the PANI matrix. The nanocomposite films were then stretched at very low strains at room...
In this work, the oxidant Cr(VI) dose was observed to have influenced the polyaniline (PANI) nanostructures as well as the crystallization structure. The temperature dependent resistivity study revealed a quasi 3-dimensional variable range hopping (VRH) electrical conduction mechanism. The permittivity was found to be affected by the PANI nanostructures. The observed positive MR at room temperature...
Homogeneous and fairly monosized microspherical structures of polyaniline has been synthesized using a simple soft template method with β-naphthalene sulfonic acid (β-NSA) as both the surfactant and dopant, and ammonium persulfate (APS) as the oxidant at 2–5 °C. The morphology of PANI-NSA was successfully controlled from nanotubes to microsphere, by changing the synthesis conditions (i.e. pH, the...
Effects of polarons on the single (NH4OH) and double (NH4OH + LiOH) dedoped nanostructured products obtained in the oxidative polymerization of aniline are investigated. These effects are probed by 15N and 13C solid-state NMR, FTIR, Raman and EPR spectroscopy. The morphologies were imaged using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The micrographs confirmed...
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