XPS study of ruthenium tris-bipyridine electrografted from diazonium salt derivative on microcrystalline boron doped diamond.
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.
Agnès
Charles
C
CNRS, Institut Néel, Dpt Nanoscience, 25 avenue des Martyrs, UPR CNRS 2940, F-38042 Grenoble, France.
Arnault
Jean-Charles
JC
Omnès
Franck
F
Jousselme
Bruno
B
Billon
Martial
M
Bidan
Gérard
G
Mailley
Pascal
P
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
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