title: Synthesis and immobilization of Ag(0) nanoparticles on diazonium modified electrodes: SECM and cyclic voltammetry studies of the modified interfaces.
abstract: A versatile method was used to prepare modified surfaces on which metallic silver nanoparticles are immobilized on an organic layer. The preparation method takes advantage, on one hand, of the activated reactivity of some alkyl halides with Ag-Pd alloys to produce metallic silver nanoparticles and, on the other hand, of the facile production of an anchoring polyphenyl acetate layer by the electrografting of substituted diazonium salts on carbon surfaces. Transport properties inside such modified layers were investigated by cyclic voltammetry, scanning electrochemical microscopy (SECM) in feedback mode, and conducting AFM imaging for characterizing the presence and nature of the conducting pathways. The modification of the blocking properties of the surface (or its conductivity) was found to vary to a large extent on the solvents used for surface examination (H(2)O, CH(2)Cl(2), and DMF).
authors.affiliation: Laboratoire Sciences Chimiques de Rennes, Equipe MaCSE, UMR CNRS 6226, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes, France.
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Noël
authors.forename: Dodzi
authors.initials: D
authors.lastname: Zigah
authors.forename: Jacques
authors.initials: J
authors.lastname: Simonet
authors.forename: Philippe
authors.initials: P
authors.lastname: Hapiot
mesh_terms: D003979:Diazonium Compounds / Q000737:chemistry*; D004126:Dimethylformamide / Q000737:chemistry; D004563:Electrochemistry; D004566:Electrodes; D053768:Metal Nanoparticles / Q000737:chemistry*; D008752:Methylene Chloride / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D003979:Diazonium Compounds; D014867:Water; D012834:Silver; D008752:Methylene Chloride; D004126:Dimethylformamide