By Gordon G.; Spinks Geoffrey M.; Kane-Maguire, Leon A. P.; Teasdale, Pe ? Wallace
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Extra info for Conductive Electroactive Polymers
11 (a) Controlled transport of myoglobin across a conducting polymer membrane. Fast transport occurs when an electrical potential is applied to the polymer (0–A, B–C, and D–E). Undetectable permeation occurs when no potential is applied (A–B, C–D, and E–F). (b) Schematic diagram of the membrane transport cell. The membrane separates the stirred feed and receiving solutions and is connected to a galvanostat/potentiostat for control of the electrical potential and current. permeability between these different states occur due to differences in their densities and charge.
Recent research has suggested that conducting polymers are also set to emerge in devices used to store energy in the form of supercapacitors and photovoltaic systems. The intense interest in these applications is driven by developments in electric-powered vehicles and alternative energy in general. Supercapacitors are those devices able to store a charge of 50 F/g (or 30 F/cm3) or higher. 6 Device design for polymer photovoltaic device (the thickness of the polymer layer is greatly exaggerated).
Resistometry, a technique invented by Fletcher and coworkers, and first used for CEPs in our laboratories,146 enables changes in the resistance of conducting polymers to be monitored in situ. 23c). The definite potential/time lag between the current flow and resistance change is also apparent. This lag is due to the finite time required for the chemical processes causing the resistance change to occur. 5 is an oversimplification. Although anions are expelled, it is not a simple redox process. Rather, anions are continuously expelled, starting at anodic potentials, suggesting the presence of multiple redox sites, all with different standard potential (E°) values.