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.

Grafting cavitands on the Si(100) surface / G. CONDORELLI; A. MOTTA; M. FAVAZZA; I. L. FRAGALA; M. BUSI; E. MENOZZI; DALCANALE E.; L. CRISTOFOLINI. - In: LANGMUIR. - ISSN 0743-7463. - 22:26(2006), pp. 11126-11133. [10.1021/la060682p]

Grafting cavitands on the Si(100) surface

BUSI, Marco;MENOZZI, Edoardo;DALCANALE, Enrico;CRISTOFOLINI, Luigi
2006

Abstract

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.
Grafting cavitands on the Si(100) surface / G. CONDORELLI; A. MOTTA; M. FAVAZZA; I. L. FRAGALA; M. BUSI; E. MENOZZI; DALCANALE E.; L. CRISTOFOLINI. - In: LANGMUIR. - ISSN 0743-7463. - 22:26(2006), pp. 11126-11133. [10.1021/la060682p]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/1485502
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