Microstructured conducting polymers

LIGA-technique allows the fabrication of microstructured electrodes used for spectroscopic applications in a new spectroelectrochemical cell. Thus the electrochemical and spectroscopic properties of redox systems in aqueous and non aqueous solvents can be studied. In this work the deposition of polypyrrole in molded LIGA-forms is studied on the basis of former work on electrochemical polypyrrole deposition at high current densities. The stable polypyrrole-LIGA structures can be formed with high aspect ratios by electropolymerization of monomeric pyrrole in aqueous solutions. With this electrochemical preparation precise polymer-LIGA structures can be prepared with a stick width of 10-50 mu m and a structure height of 110 mu m. The new structurized polymer films were characterized by scanning electron microscopy, electrical conductivity, ESR spectroscopy and voltammetric measurements. The application of the polypyrrole-LIGA structures in the spectroelectrochemical LIGA-cell developed earlier by the group is presented.