| EPSRC Reference: |
GR/M88754/01 |
| Title: |
FIELD-CONTROLLED MICROWAVE TRANSMISSION THROUGH LARGE AREA, EDGE-ADDRESSED ELECTROACTIVE POLYMER FILMS |
| Principal Investigator: |
Wright, Professor PV |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Materials Science and Engineering |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 November 1999 |
Ends: |
31 October 2002 |
Value (£): |
145,545
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
Chemicals |
| Electronics |
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Summary on Grant Application Form |
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Composites of nanoparticulate conjugated polymer (CP-polyaniline, polypyrrole) with polymer electrolyte (PEO) redox systems (e.g.Ag/Ag+, Cu/Cu2+) will be press-formed into films (100-300microns). Low potential fields (~10V/cm) applied across 'large areas' (1-ca. 100cm2) from the edges transform the CP from a reduced high impedance state to an oxidised conductive form. This is considered to involve electron transport via the redox couple in the PEO phase, promoted by charge neutralisation requirements at the interface with the CP and the propagated across the area in cascade process. Changes in microwave with simultaneous cyclic voltammetry.We propose to compare several redox metal/ion systems and to investigate the addition of electron transporters into the PEO phase and surface-active additives to stabilise the CP-PEO interface. We also propose to compare random mixtures of the two phases, (as used hitherto and in which injection into each phase is 'electrode sign selective') with laminated configurations with each phase separately addressed. Low ambient conductivity polymer electrolytes to stabilise ions at the interface ('frozen junction') will also be investigated. The use of dissimilar metal electrodes may permit increased rates of switch 'OFF' by allowing reversed potential fields.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |