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Stabilization of mid-sized silicon nanoparticles by functionalization with acrylic acid

Robert Bywalez1*, Hatice Karacuban2, Hermann Nienhaus23, Christof Schulz13 and Hartmut Wiggers13

Author Affiliations

1 IVG, Institute for Combustion and Gasdynamics, University Duisburg-Essen, Duisburg, 47048, Germany

2 Faculty of Physics, University Duisburg-Essen, Duisburg, 47048, Germany

3 CeNIDE, Center for Nanointegration Duisburg-Essen, Duisburg, 47048, Germany

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Nanoscale Research Letters 2012, 7:76  doi:10.1186/1556-276X-7-76

Published: 16 January 2012

Abstract

We present an enhanced method to form stable dispersions of medium-sized silicon nanoparticles for solar cell applications by thermally induced grafting of acrylic acid to the nanoparticle surface. In order to confirm their covalent attachment on the silicon nanoparticles and to assess the quality of the functionalization, X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier spectroscopy measurements were carried out. The stability of the dispersion was elucidated by dynamic light scattering and Zeta-potential measurements, showing no sign of degradation for months.