Département de chimie moléculaire

The electropolymn. of N-substituted pyrroles on a dissolvable calcium carbonate nanoparticle template was investigated in order to improve the film permeabilities in aq. soln. After deposition of CaCO3 nanoparticles on the electrode surface, poly(pyrrole-ammonium) or poly(pyrrole-NTA) (NTA: nitrilotriacetic acid) were electrogenerated around the template structures of the electrodes using potentiostatic methods. The dissoln. of nanoparticles in acidic medium leads to the formation of nano-porous structures increasing, therefore, the polypyrrole permeability in aq. solns. Histidine-tagged glucose oxidase, chosen as an enzyme model, was immobilized on the modified polypyrrole-NTA via the NTA-Cu2+-histidine interactions to validate the proposed method. The described setup led to a twofold increase in the max. c.d. from 5 to 10 $μ$A cm-2 after template dissoln. [on SciFinder(R)]