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3.5 Conclusions

When proper precautions are taken, good interfaces between high-temperature superconductors and conducting polymers can be formed. Additionally, good electron transfer between the high-temperature superconductor and the conducting polymer can be realized. Cyclic voltammetry also demonstrates redox properties of polypyrrole / YBa2Cu3O7-x assemblies similar to that of polypyrrole deposited on noble metal electrodes. Dramatic differences have also been noted in polypyrrole when the self-assembled monolayer template, N-(3-aminopropyl) pyrrole, is used to pre-treat the superconductor before electropolymerization of polypyrrole. The growth rate of polypyrrole when a SAM template is used appears to be two dimensional, whereas, the uncoated cuprate sample appears to foster three-dimensional growth. Moreover, there is improved adhesion to the superconductor upon the use of a SAM template as seen in the adhesive tape tests. The self-assembled monolayer also changes the morphology of the polypyrrole. The SAM treated sample has a morphology that follows the surface of the underlying superconductor; while the non-SAM treated sample shows globular features that do not reflect the morphology of the underlying superconductor. The formation of conducting polymer high-temperature superconductor interfaces is critical in understanding the electron transfer between these two unique materials.

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Updated on: April 15, 2010 8:26 PM