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Thermal Functionalization of Hydrogen-Terminated Porous Silicon Surfaces with Terminal Alkenes and Aldehydes

Published online by Cambridge University Press:  17 March 2011

Rabah Boukherroub ,
David J. Lockwood ,
Danial D. M. Wayner  and
Leigh T. Canham
Rabah Boukherroub
Affiliation:
Steacie Institute for Molecular Sciences
David J. Lockwood
Affiliation:
Institute for Microstructural Sciences National Research Council, Ottawa, Ontario, Canada K1A 0R6
Danial D. M. Wayner
Affiliation:
Steacie Institute for Molecular Sciences
Leigh T. Canham
Affiliation:
DERA, Malvern, Worcs. WR14 3PS, UK
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Abstract

H-terminated porous silicon (PSi) surfaces were chemically modified with terminal alkenes and aldehydes at high temperature to yield organic monolayers covalently attached to the surface through Si-C and Si-O-C bonds, respectively. Diffuse reflectance infrared Fouriertransform and X-ray photoelectron spectroscopies have been used to characterize the surfaces. Derivatized surfaces retain the PSi photoluminescence. Chemography was used to monitor the chemical changes of the PSi surface when exposed to 100% humidity in air. Organic monolayers linked through Si-C bonds are found to be highly resistant and have shown a better protection of the surface against corrosion compared to surfaces that are linked through Si-O-C bonds. The surface functionalized with ethyl undecylenate exhibits an even higher passivation of the surface through the presence of small amounts of oxide, which are induced by traces of water present in this chemical reagent, along with organic molecules attached to the surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 638: Symposium F – Microcrystaline & Nanocrystalline Semiconductors-2000 , 2000 , F11.4.1
Copyright
Copyright © Materials Research Society 2001

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