title: Grafting cavitands on the Si(100) surface.
abstract: Cavitand molecules having double bond terminated alkyl chains and different bridging groups at the upper rim have been grafted on H-terminated Si(100) surface via photochemical hydrosilylation of the double bonds. Pure and mixed monolayers have been obtained from mesitylene solutions of either pure cavitand or cavitand/1-octene mixtures. Angle resolved high-resolution X-ray photoelectron spectroscopy has been used as the main tool for the monolayer characterization. The cavitand decorated surface consists of Si-C bonded layers with the upper rim at the top of the layer. Grafting of pure cavitands leads to not-well-packed layers, which are not able to efficiently passivate the Si(100) surface. By contrast, monolayers obtained from cavitand/1-octene mixtures consist of well-packed layers since they prevent silicon oxidation after aging. AFM measurements showed that these monolayers have a structured topography, with objects protruding from the Si(100) surface with average heights compatible with the expected ones for cavitand molecules.
authors.affiliation: Dipartimento di Scienze Chimiche, Università degli Studi di Catania, and INSTM UdR di Catania, viale A. Doria 6, 95100 Catania, Italy.
authors.forename: Guglielmo G
authors.initials: GG
authors.lastname: Condorelli
authors.forename: Alessandro
authors.initials: A
authors.lastname: Motta
authors.forename: Maria
authors.initials: M
authors.lastname: Favazza
authors.forename: Ignazio L
authors.initials: IL
authors.lastname: Fragalà
authors.forename: Marco
authors.initials: M
authors.lastname: Busi
authors.forename: Edoardo
authors.initials: E
authors.lastname: Menozzi
authors.forename: Enrico
authors.initials: E
authors.lastname: Dalcanale
authors.forename: Luigi
authors.initials: L
authors.lastname: Cristofolini