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Electrocatalytic (Bio)Nanostructures Based on Polymer-Grafted Platinum Nanoparticles for Analytical Purpose

Francois Gal 1 Lylian Challier 2 Fabrice Cousin 1 Henri Perez 3 Vincent Noel 2 Geraldine Carrot 4, *
* Corresponding author
3 LEDNA - Laboratoire Edifices Nanométriques
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
4 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : Functionalized platinum nanoparticles (PtNPs) possess electrocatalytic properties toward H 2 O 2 oxidation, which are of great interest for the construction of electro-chemical oxidoreductase-based sensors. In this context, we have shown that polymer-grafted PtNPs could efficiently be used as building bricks for electroactive structures. In the present work, we prepared different 2D-nanostructures based on these elementary bricks, followed by the subsequent grafting of enzymes. The aim was to provide well-defined architectures to establish a correlation between their electro-catalytic properties and the arrangement of building bricks. Two different nanostructures have been elaborated via the smart combination of surface initiated-atom transfer radical polymerization (SI-ATRP), functionalized PtNPs (Br-PtNPs) and Langmuir−Blodgett (LB) technique. The first nanostructure (A) has been elaborated from LB films of poly(methacrylic acid)-grafted PtNPs (PMAA-PtNPs). The second nanostructure (B) consisted in the elaboration of polymer brushes (PMAA brushes) from Br-PtNPs LB films. In both systems, grafting of the glucose oxidase (GOx) has been performed directly to nanostructures, via peptide bonding. Structural features of nanostructures have been carefully characterized (compression isotherms, neutron reflectivity, and profilometry) and correlated to their electrocatalytic properties toward H 2 O 2 oxidation or glucose sensing.
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https://hal-cea.archives-ouvertes.fr/cea-01334972
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Submitted on : Tuesday, June 21, 2016 - 3:29:22 PM
Last modification on : Friday, August 14, 2020 - 3:24:03 PM

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Francois Gal, Lylian Challier, Fabrice Cousin, Henri Perez, Vincent Noel, et al.. Electrocatalytic (Bio)Nanostructures Based on Polymer-Grafted Platinum Nanoparticles for Analytical Purpose. ACS Applied Materials & Interfaces, Washington, D.C. : American Chemical Society, 2016, 8, pp.14747-14755. ⟨10.1021/acsami.6b02956⟩. ⟨cea-01334972⟩

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