Electronically conductive polymer films

Pickup, P. G. Electrochemistry of Electronically Conducting Polymer Films 33... 

This volume contains six chapters and a cumulative index for numbers 1-33. The topics covered include the potential of zero charge nonequilibrium fluctuation in the corrosion process conducting polymers, electrochemistry, and biomimicking processes microwave (photo)-electrochemistry improvements in fluorine generation and electronically conducting polymer films. 

Although most amperometric SECM experiments involved ET reactions at the tip and/or substrate, interfacial IT processes can also be probed. Historically, the first IT reactions studied by SECM were ion-exchange processes at ionically and electronically conductive polymer films (48). The ions of interest were electrochemically active (e.g., Ec(CN)f or Br ) to enable amperometric detection at the tip. It was shown more recently that the tip process can be an IT reaction rather than an ET process if a micropipet electrode is used as an amperometric probe (49). In this section we consider two different types of IT reactions employed in SECM studies, i.e., facilitated IT and simple IT. 

UVERS study of the formation of electron conducting polymer films at a gold electrode, and of their modification by intercalation of metal aggregates or of iron phthalocyanine ... 

Schematic representation of procedure used to synthesize fibrillar/microporous electronically conducting polymer films.

Schematic representation of microporous membrane-coated electrode used to synthesize fibrillar/microporous electronically conductive polymer films, a. 7mm glass tube. b. Cu wire. c. Kel-F body. d. Ag/epoxy contact, e. Convex Pt disk electrode, f. Rubber collar, g. Nuclepore microporous filtration membrane. 

FIGURE 1.16. (a) Kinetic case diagrams for dopant transport and reaction in electronically conducting polymer films according to the Bartlett-Gardner model. Thick lines separate different approximate solutions to the transport/kinetic problem. Six distinct cases are noted, (b) Computed concentration profiles u x) and site occupancy functions 0 for each of the six cases, (c) Schematic representation of the moving boundary problem (Case 6). 

FIGURE 1.26. (a) Schematic representation of the oxidized site distribution in an electronically conducting polymer film according to the Aoki phase propagation model, (b) Conductive front propagation modeled as a random distribution of oxidized chains with each chain starting from a random location on the support electrode surface, (c) An assembly of conductive one-dimensional pillar fibrils of various lengths. 

Therefore admittance data can also be plotted in the complex plane (V versus F with (o implicit). Some researchers choose to display data in terms of the complex capacitance C( o>) here C( a>) = Y j(o)lj(o. The latter type of representation can be useful when examining the electrochemical response of electronically conducting polymer films. The low-frequency redox pseudocapacitance can be read directly from a plot of C" versus C at low frequency. 

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