Charge transport in a mixed ironically/electronically conducting, cationic, polyacetylene ionomer between ion-blocking electrodes

Article Abstract:

The electrical behavior of the cationic, polyacetylene-based, conjugated ionomer, poly[(2-cyclooctatetraenylethyl)trimethly lammonium trifuoromethanesulfonate], sandwiched between gold electrodes is reported. The steady-state current of this mixed ionically/ electronically conducting system is assigned to be unipolar diffusive hole transport for voltages below ~1.4 V, giving way to bipolar migratory transport above ~ 1.4 V.

Electric properties, Electrical conductivity, Charge transfer

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Mechanisms of actuation in conducting polymers: osmotic expansion

Article Abstract:

The thermodynamics of the volume change of conducting polymers is examined and experimental evidence for the existence of osmotic expansion as an important mechanism for a typical conducting polymer actuator system, polypyrrole (PPy) doped with dodecylbenzene sulfonate (DBS) is given. The experiments revealed that the expansion decreases as the electrolyte concentration is increased.

Oxidation-reduction reaction, Oxidation reduction reactions, Thermodynamics

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Nonlinear osmotic brush regime: Experiments, simulations and scaling theory

Article Abstract:

Highly condensed planar brushes are considered experimentally and theoretically, made of charged polymers. It is shown that strongly stretched brushes show a slight but detectable height variation upon lateral compression, using X-ray reflectivity on polyelectrolytes.

Osmotic pressure, X-ray analysis

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