title: XPS study of ruthenium tris-bipyridine electrografted from diazonium salt derivative on microcrystalline boron doped diamond.
abstract: Boron doped diamond (BDD) functionalization has received an increasing interest during the last few years. Such an infatuation comes from the original properties of BDD, including chemical stability or an electrochemical window, that opens the way for the design of (bio)sensors or smart interfaces. In such a context, diazonium salts appear to be well suited for BDD functionalization as they enable covalent immobilization of functional entities such as enzymes or DNA. In this study we report microcrystalline BDD functionalization with a metallic complex, ruthenium tris(bipyridine), using the p-(tris(bipyridine)Ru(2+))phenyl diazonium salt. Electrografting using cyclic voltammetry (CV) allowed the formation of a ruthenium complex film that was finely characterized using electrochemistry and X-ray photoelectron spectroscopy (XPS). Moreover, we showed that chronopotentiometry (CP) is a convenient tool to monitor Ru complex film deposition through the control of the electrochemical pulse parameters (i.e. current density and pulse duration). Finally, such a control was demonstrated through the correlation between electrochemical and XPS characterizations.
authors.affiliation: CNRS, Institut Néel, Dpt Nanoscience, 25 avenue des Martyrs, UPR CNRS 2940, F-38042 Grenoble, France.
authors.forename: Charles
authors.initials: C
authors.lastname: Agnès
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Arnault
authors.forename: Franck
authors.initials: F
authors.lastname: Omnès
authors.forename: Bruno
authors.initials: B
authors.lastname: Jousselme
authors.forename: Martial
authors.initials: M
authors.lastname: Billon
authors.forename: Gérard
authors.initials: G
authors.lastname: Bidan
authors.forename: Pascal
authors.initials: P
authors.lastname: Mailley
mesh_terms: D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D001895:Boron / Q000737:chemistry*; D056831:Coordination Complexes; D018130:Diamond / Q000737:chemistry*; D003979:Diazonium Compounds / Q000737:chemistry; D055664:Electrochemical Techniques; D006046:Gold / Q000737:chemistry; D015394:Molecular Structure; D056951:Photoelectron Spectroscopy; D013499:Surface Properties; D017975:Ruthenium Compounds
chemical_list: D015082:2,2'-Dipyridyl; D001895:Boron; D056831:Coordination Complexes; D018130:Diamond; D003979:Diazonium Compounds; D006046:Gold; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds