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Hybrid Nanoparticles Prepared by In-situ and Post-synthetic Surface Modification of Lanthanide-Based Nanoparticles with Phosphonic Acid Derivatives

Published online by Cambridge University Press:  17 March 2011

Christoph Rill ,
Sorin Ivanovici  and
Guido Kickelbick
Christoph Rill
Affiliation:
Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/165, Vienna, A-1060, Austria
Sorin Ivanovici
Affiliation:
Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/165, Vienna, A-1060, Austria
Guido Kickelbick
Affiliation:
Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/165, Vienna, A-1060, Austria
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Abstract

The use of various phosphonic acid derivatives – some of which contain polymerizable groups – as surface modifying agents for nanoparticles was studied both in-situ during the synthesis of lanthanide-based (Ln = Nd, Eu, Yb) nanoparticles at room temperature as well as in a separate step after the particle preparation by a hydrothermal method. In the single-pot in-situ method the phosphonic acid esters served as growth-limiting agent during particle formation leading to small nanoparticles with a size of only a few nanometers as determined by dynamic light scattering as well as transmission electron and atomic force microscopy. Free phosphonic acids as well as their silyl esters were used to modify the hydrothermally prepared neodymium hydroxide nanorods which had diameters of approx. 20 nm and a length ranging up to a few micrometers. The surface modification was confirmed by infrared spectroscopy and thermogravimetric analysis.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1007: Symposium S – Organic/Inorganic Hybrid Materials-2007 , 2007 , 1007-S12-02
Copyright
Copyright © Materials Research Society 2007

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References

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