Localized Reduction of Graphene Oxide by Electrogenerated Naphthalene Radical Anions and Subsequent Diazonium Electrografting

Joël Azevedo (1) , Laure Fillaud (1) , Céline Bourdillon (1) , Jean-Marc Noël (2) , Fréderic Kanoufi (2) , Bruno Jousselme (1) , Vincent Derycke (1) , Stéphane Campidelli (1) , Renaud Cornut (1)

1 LICSEN UMR 3685 - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
2 PECSA - Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques

Herein, we describe a new localized functionalization method of graphene oxide (GO) deposited on a silicon oxide surface. The functionalization starts with the reduction of GO by electrogenerated naphthalene radical anions. The source of reducers is a microelectrode moving close to the substrate in a typical scanning electrochemical microscopy (SECM) configuration. Then, the recovery of electronic conductivity upon reduction enables the selective electrochemical functionalization of the patterns. The illustrative example is the electrografting of reduced-GO with a diazonium salt bearing a protonated amino group that can further immobilize gold nanoparticles by simple immersion. This study opens new routes for the construction of multifunctional patterned surfaces.

Domaines: Matériaux

Joël Azevedo, Laure Fillaud, Céline Bourdillon, Jean-Marc Noël, Fréderic Kanoufi, et al.. Localized Reduction of Graphene Oxide by Electrogenerated Naphthalene Radical Anions and Subsequent Diazonium Electrografting. Journal of the American Chemical Society, 2014, 136 (13), pp.4833-4836. ⟨10.1021/ja500189u⟩. ⟨hal-01156578⟩