title: Electrochemical reversibility of vinylferrocene monolayers covalently attached on H-terminated p-Si(100).
abstract: A reversible electrochemical behavior is demonstrated on a specially prepared redox-functionalized H-Si(100) surface, obtained via an extra-mild grafting procedure from vinylferrocene. The results of a detailed XPS and electrochemical characterization of the resulting hybrid are reported and discussed to propose it as a reference system for high-quality electroactive monolayers on Si. The investigated ferrocene derivative bears a functional group suitable for a mild route to covalent anchoring on Si, which is based on a photoinduced reaction with visible light under an inert atmosphere. Electrochemical reversibility is shown by sharp symmetric voltammograms on freshly prepared p-Si electrodes. Anodic oxide growth is responsible for the progressive degradation of the electrochemical response. Still, fast electron transfer to the surface redox species is maintained during several thousands cycles.
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", p.le A. Moro, 5-00185 Roma, Italy.
authors.forename: Franco
authors.initials: F
authors.lastname: Decker
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Cattaruzza
authors.forename: Carlo
authors.initials: C
authors.lastname: Coluzza
authors.forename: Alberto
authors.initials: A
authors.lastname: Flamini
authors.forename: Andrea Giacomo
authors.initials: AG
authors.lastname: Marrani
authors.forename: Robertino
authors.initials: R
authors.lastname: Zanoni
authors.forename: Enrique A
authors.initials: EA
authors.lastname: Dalchiele