Synthesis by Cyclic Voltammetry

In order to immobilize enzymes in conducting polymers to fabricate biosensors, the electrochemical synthesis of polypyrrole films was studied under different conditions. It was found that the size and morphology of polypyrrole films synthesized using cyclic voltammetry were affected by the concentration of the supporting electrolyte at a scan potential range between 0.0 and 1.0 V (vs. SCE), and at a scan rate of 48 mV s [47]. The diameters of particles prepared in a solution containing 0.10 M pyrrole and 0.10 M NaCl 

Gao et al. reported the synthesis of aligned coaxial nanowire of carbon nanotubes with polypyrrole or polyaniline using a cyclic voltammetric technique [50]. DC conductivity of the polyaniline-coated nanotube film was measured to be 10 S cm , which is higher than that of polyaniline film electrochemically deposited on a gold plate under the same conditions. This is possibly due to the doping effect associated with carbon nanotubes. 

Vasilieva et al. synthesized redox polymers poly[M(SchifQ] (M = Ni, Pd Schiff = tetradentate Schiff bases) with nanowire diameters in the range 20-200 nm using cyclic voltammetry [52]. They demonstrated that nanostructures based on redox polymers have conductivities that are more than an order of magnitude greater than bulk samples of the same polymers. 

The fabrication of polypyrrole wires via electropolymerization within poly(methyl methacrylate) nanochannels on an indium tin oxide (ITO) substrate was reported by Chen et al. [53]. The electrochemical synthesis of polypyrrole was performed by a cyclic voltammetry method in aqueous 0.1 M NaC104 containing 0.1 M pyrrole monomer. The potential was scanned 10 times between -0.7 and +0.6 V vs. Pt at a scan rate of 100 mV s . The nanochannels act as templates for electropolymerization of polypyrrole nanowires. 

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