TY - JOUR
T1 - Redox-active Si(100) surfaces covalently functionalised with [60]fullerene conjugates: New hybrid materials for molecular-based devices
T2 - New hybrid materials for molecular-based devices
AU - Cattaruzza, Fabrizio
AU - Llanes-Pallas, Anna
AU - Marrani, Andrea G.
AU - Dalchiele, Enrique A.
AU - Decker, Franco
AU - Zanoni, Robertino
AU - Prato, Maurizio
AU - Bonifazi, Davide
N1 - Publication code : RES. ACAD.
PY - 2008/3/31
Y1 - 2008/3/31
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=41149132356&partnerID=8YFLogxK
U2 - 10.1039/b717438a
DO - 10.1039/b717438a
M3 - Article
SN - 0959-9428
VL - 18
SP - 1570
EP - 1581
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 13
ER -