Permeability improvements of electropolymerized polypyrrole films using dissolvable nano-CaCO3 particle templates.
The electropolymerisation of N-substituted pyrroles on a dissolvable calcium carbonate nanoparticle template was investigated in order to improve the film permeabilities in aqueous solution. 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 dissolution of nanoparticles in acidic medium leads to the formation of nano-porous structures increasing, therefore, the polypyrrole permeability in aqueous solutions. Histidine-tagged glucose oxidase, chosen as an enzyme model, was immobilised on the modified polypyrrole-NTA via the NTA-Cu(2+)-histidine interactions to validate the proposed method. The described setup led to a twofold increase in the maximum current density from 5 to 10 μA cm(-2) after template dissolution.
University "Politehnica" of Bucharest, Faculty of Applied Chemistry and Material Science, Gh. Polizu 1-7, 011061, Bucharest, Romania. em_ungureanu2000@yahoo.com.
Luisa-Roxana
LR
Popescu Mandoc
Karine
K
Gorgy
Eleonora-Mihaela
EM
Ungureanu
George-Octavian
GO
Buica
Michael
M
Holzinger
Serge
S
Cosnier
D002119:Calcium Carbonate / Q000737:chemistry*; D002138:Calibration; D055664:Electrochemical Techniques; D018613:Microscopy, Confocal; D053758:Nanoparticles; D010539:Permeability; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*
D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D002119:Calcium Carbonate