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Enhanced long-term stability of functionalized silicon nanoparticles using esters

Published online by Cambridge University Press:  31 January 2011

Anoop Gupta ,
Sebastian Kluge ,
Christof Schulz  and
Hartmut Wiggers
Anoop Gupta
Affiliation:
[email protected], University of Duisburg-Essen, Institute for Combustion and Gasdynamics, Lotharstr. 1, Duisburg, NRW, 47057, Germany, +49-203-379-3769, +49-203-379-3087
Sebastian Kluge
Affiliation:
[email protected], University of Duisburg-Essen, Institute for Combustion and Gasdynamics, Duisburg, NRW, Germany
Christof Schulz
Affiliation:
[email protected], University of Duisburg-Essen, Institute for Combustion and Gasdynamics, Duisburg, NRW, Germany
Hartmut Wiggers
Affiliation:
[email protected], University of Duisburg-Essen, Institute for Combustion and Gasdynamics, Duisburg, NRW, Germany
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Abstract

The surface of freshly etched silicon nanoparticles (Si-NPs) was covalently bonded with alkyl groups and esters via thermally induced hydrosilylation. The surface chemistry of functionalized Si-NPs was analyzed at different air exposure time by means of Fourier transform infrared spectroscopy (FTIR). We observed that the stability of functionalized Si-NPs significantly depends on the type of organic ligands attached to their surface. Ester-terminated Si-NPs exhibit higher stability compared to that are bonded with alkyl groups. We show that the use of esters with large spatial configuration causes a lower surface coverage of Si-NPs but at the same time offers better protection against surface oxidation.

Keywords

surface chemistryoxidationnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1207: Symposium N – Colloidal Nanoparticles for Electronic Applications — Light Emission, Detection, Photovoltaics and Transport , 2009 , 1207-N02-03
Copyright
Copyright © Materials Research Society 2010

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