Permeability Improvement of Electropolymerized Polypyrrole Films in Water Using Magnetic Hydrophilic Microbeads |
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Authors: | Serge Cosnier Shou‐Nian Ding Aymeric Pellissier Karine Gorgy Michael Holzinger Briza Pérez López Arben Merkoçi |
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Institution: | 1. Département de Chimie Moléculaire, UMR – 5250, ICMG FR‐2607, CNRS, Université Joseph Fourier Grenoble I, BP 53, 38041?Grenoble, Cedex 9, Grenoble, France;2. ICREA & Nanobioelectronics & Biosensors Group, Institut Català de Nanotecnologia;3. Departament de Química, Grup de Sensors i Biosensors, Universitat Autònoma de Barcelona, E‐08193?Bellaterra, Barcelona, Catalonia, Spain |
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Abstract: | 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. |
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Keywords: | Magnetic microbeads Poly(pyrrole‐pyrene) Electropolymerized film Permeability Biosensor |
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