By Gordon G.; Spinks Geoffrey M.; Kane-Maguire, Leon A. P.; Teasdale, Pe ? Wallace
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Extra resources for Conductive Electroactive Polymers
Subsequent oxidation of this polymer releases the cation species back into the surrounding electrolyte. 5. 82 In other applications the release can also be automatically stimulated by a change in the environment. For example, it is known that the galvanic coupling of conducting polymer coatings (such as polyaniline) to metals such as steel and aluminum causes a reduction of the polymer from the emeraldine salt state to the leucoemeraldine base state, and this process involves the release of the dopant ion into the surrounding electrolyte.
G. Wallace, 1995, p. ) polymer. In particular, the oxidized polymer is believed to adopt a more planar conformation to allow better conjugation. 23) is thought to be due to the overlap of very many redox peaks. As the polymer is a mixture of molecular weights and each has a different oxidation potential, the CV records a continuous current corresponding to the sequential oxidation (reduction) of different oligomeric/polymeric species in the sample. 4). 4, accepted by many scientists for the best part of a decade, belie the complexity of the controllable dynamic behavior of conducting polymers.
Switching the polymer repeatedly between its available oxidation states facilitates transport of ionic/molecular species through the polymer membrane. Changes in 20 Conductive Electroactive Polymers E Concentration of MYO on Receiving Solution 250 F 200 C 150 D 100 50 0 A 0 B 100 200 300 400 Time (min) (a) Membrane & Connections V C R Feed Sol. Receiving Sol. Gal/Pot Ext. 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).