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Permeability Improvement of Electropolymerized Polypyrrole Films in Water Using Magnetic Hydrophilic Microbeads
Author(s) -
Cosnier Serge,
Ding ShouNian,
Pellissier Aymeric,
Gorgy Karine,
Holzinger Michael,
Pérez López Briza,
Merkoçi Arben
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804484
Subject(s) - polypyrrole , pyrrole , ferrocyanide , materials science , chemical engineering , polymerization , aqueous solution , potassium ferrocyanide , glucose oxidase , electrochemistry , amperometry , vinyl alcohol , permeability (electromagnetism) , electrode , biosensor , polymer chemistry , chemistry , nanotechnology , polymer , membrane , organic chemistry , composite material , engineering , biochemistry
The electrochemical polymerization of polypyrrole films onto magnetically immobilized hydrophilic microbeads was carried out. Poly(pyrrole‐pyrene)‐microbeads coatings display thus higher permeability in water towards the diffusion of ferrocyanide than a pure poly(pyrrole‐pyrene) film. In addition, the modulation of this permeability through an applied magnetic field that attracts the microbeads on the electrode surface or pushes back them was shown. Moreover, a glucose biosensor was prepared by adsorbing and electropolymerizing on a platinum electrode, an aqueous mixture containing glucose oxidase, amphiphilic pyrrole monomer and microbeads attracted by a magnet. The presence of microbeads inside the biocoating, markedly increases the biosensor performance.