Polypyrrole

Structured Polypyrrole

The electrochemical polymerization of pyrrole in a template produced by lithography-electroforming technology allows the production of micro structured polymer films as shown in the figure below. 

In dependence on the polymerization parameters films with one or two dimensional structure can be obtained. Despite these films are very thin they have a high mechanical stability. Copolymerizartion or the embedment of additives provides modified polymerfilms for electrochemical sensor application.
The ESR-spectrum of polypyrrole shows in vacuum a symmetrical and very narrow one line spectrum with a g-factor of 2.0026. In air the line width  reversibly increases tenfold. This allows the quantitative mesurement of oxygen concentration by ESR-spectroscopy.