Self-Assembly and Characterization of Fullerene Monolayers on Si(100) Surfaces

Abstract

Self-assembly of C60 molecules on planar n-or p-type Si(100) has been accomplished by direct tethering onto the Si surface without using any intermediate functional hydrocarbon chain. Photoresponse has been observed on these monolayer modified electrodes in both aqueous and nonaqueous media. The p-type Si(100) surface with a bound C60 monolayer is also capable of mediating redox reactions. These C60 monolayer modified Si electrodes are very stable in both acidic aqueous and polar nonaqueous solvents. Characterization by fast atom bombardment mass spectroscopy (FAB-MS) suggests that simultaneous hydrosilylation and hydrogenation reactions account for the nature of the monolayer formation.

Electronic and structural properties of C59Si on the monohydride Si(100) surface

“…Therefore, the C 59 Si heterofullerenes are expected to be very reactive at the Si sites, a behavior observed through theoretical calculations for an Si substitutional defect in carbon nanotubes [3,4]. Moreover, there has been increasing interest in functionalizing Si surfaces with fullerenes [5], either for electron transport proper-ties, or even for storage properties, when endohedral fullerenes are considered [6].…”

Electron transport of bis(terpyridine)iron(II) complex wires on a semiconducting electrode

“…The asymmetric charge transfer and the photoresponsive redox behavior have been caused by the semiconducting electronic properties such as dopant type, resistivity and band gap [25][26][27][28][29][30][31][32].…”

Immobilization of [60]fullerene on silicon surfaces through a calix[8]arene layer

“…17,18 Some noticeable examples are the wettability modulation of porous silicon 19 and the modification of electronic properties of semiconductors thanks to the electronaccepting characteristics of the fullerene sphere. [20][21][22][23] In the mentioned cases, the fullerene cage was functionalized with appropriate grafting groups for the bonding to the surface. Fullerene-based supramolecular systems, 24 on the other hand, do not require the functionalization of the carbon allotrope guest, which fully retains its electronic properties and, at least in principle, is less prone to aggregation.…”