Electronically conductive polymer films scanning electrochemical

Although conductive polymers can be made by a variety of methods, electropolymerization is by far the most convenient method in constructing a polymer modified electrode. The polymerization proceeds by an electrochemical reaction at the electrode surface, resulting in immobilization of a polymer film. For example. Figure 8.18 shows current-potential curves for electropolymerization of fluorene. The peaks in each curve show the deposition of an additional layer of polyfluorene (127). The peak currents during electropolymerization of different types of polymer can increase or decrease with each subsequent scan depending on the electron transfer characteristics of the polymer and the deposition rate (127, 128). 

Finally, Hapiot and coworkers used scanning electrochemical microscopy (SECM) in feedback mode to investigate electronic and permeation properties of the polymeric films obtained from the mono-substituted ZnOEPfbpy)" monomer and ZnOEP monomer in the presence of free bipyridine [143]. The results showed that the polymer obtained from the EPOP process (namely from the commercial ZnOEP) was more permeable and had a lower conductivity than the one prepared using the mono-substituted ZnOEPfbpy)" monomer. These two observations were... 

---