Redox-active Si(100) surfaces covalently functionalised with [60]fullerene conjugates: New hybrid materials for molecular-based devices: New hybrid materials for molecular-based devices

Fabrizio Cattaruzza, Anna Llanes-Pallas, Andrea G. Marrani, Enrique A. Dalchiele, Franco Decker, Robertino Zanoni, Maurizio Prato, Davide Bonifazi

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Résumé

Herein, we report the covalent immobilisation, through Si-C bonds, of various [60]fullerene derivatives on flat silicon surfaces following three different preparative protocols. Each synthetic strategy comprises a two-step approach that includes a pre-modification step of the Si(100) surface with an organic monolayer bearing a terminal functionality that undergoes a bond-forming reaction with a [60]fullerene synthon as characterized by X-ray photoelectron spectroscopy (XPS) measurements. Water contact angle measurements clearly showed a characteristic change of the surface hydrophobicity upon covalent immobilisation of the carbon functions. The hybrid [4b-Si(100)] surfaces, containing [60]fullerene-ferrocene fragments, were also investigated by means of cyclic voltammetry (CV), and were revealed to be exceptionally robust towards repeated reduction-oxidation cycles. Moreover, several surface-confined redox couples were observed in CH3CN solution. The surface coverage was measured to be ca. 2.5 × 10-11 mol cm-2. © The Royal Society of Chemistry.

langue originaleAnglais
Pages (de - à)1570-1581
Nombre de pages12
journalJournal of Materials Chemistry
Volume18
Numéro de publication13
Les DOIs
Etat de la publicationPublié - 31 mars 2008

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