| EPSRC Reference: |
GR/R70743/01 |
| Title: |
CONTROLLED MICROWAVE TRANSMISSION THROUGH LARGE AREA NANOCOMPOSITE ELECTROACTIVE POLYMER FILMS |
| Principal Investigator: |
Wright, Professor PV |
| Other Investigators: |
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| Department: |
Materials Science and Engineering |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 February 2002 |
Ends: |
31 March 2003 |
Value (£): |
240,779
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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The further development of conjugated polymer-polymer electrolyte composites incorporating redox couples M(n+)/M(n+1)+which function as windows/surfaces for the field-controlled transmission/reflection of microwaves is proposed. The composites incorporate micro- or nanoparticulate polyaniline, poiypyrrole (PPY) or poly(3,4-ethylenedioxythiophene) (PEDOT). The latter two in particular in conjunction with Ag/Ag+ and Cu/Cu2+ have recently demonstrated large changes in microwave transmission (12-21dB).Of particular concern is the determination of electrochemical (redox) behaviour using single cells, the magnitude and rate of change in transmission between 'on' and 'ofr states according to the method of preparation of the composite (-micro- or nanoparticulate) and the attemating frequency of the applied field. The CP loading, stoichiometry of redox and supporting ions will be optimised and the influence of additives to promote electron transport or ion mobility will be evaluated in order to test the 'particle polarisation' mechanism. Commercial samples of particulate PEDOT - polystyrene sulphonate will be compared with laboratory synthesised material. Of significant interest is the possibility of photoelectrochemical control of microwave transmission.This is to be investigated in the first instance by incorporating Rut+(bipy)3 / Ru3+(bipy)3 into PEDOT-polystyrene sulphonate - based systems, which have significant optical transparency in the conductive state, to give a photoreduced 'ofr state
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Key Findings |
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Potential use in non-academic contexts |
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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 |
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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 |