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.

Electrochemical reversibility of vinylferrocene monolayers covalently attached on H-terminated p-Si(100) / Decker, Franco; Fabrizio, Cattaruzza; Coluzza, Carlo; Alberto, Flamini; Marrani, Andrea Giacomo; Zanoni, Robertino; Enrique A., Dalchiele. - In: JOURNAL OF PHYSICAL CHEMISTRY. B, CONDENSED MATTER, MATERIALS, SURFACES, INTERFACES & BIOPHYSICAL. - ISSN 1520-6106. - STAMPA. - 110:14(2006), pp. 7374-7379. [10.1021/jp056921j]

Electrochemical reversibility of vinylferrocene monolayers covalently attached on H-terminated p-Si(100)

DECKER, Franco;COLUZZA, Carlo;MARRANI, Andrea Giacomo;ZANONI, Robertino;
2006

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/231722
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