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Issue 19, 2009
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In situ investigation of molecular kinetics and particle formation of water-dispersible titania nanocrystals

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Abstract

Metal oxide nanoparticles can be fabricated under high control via nonaqueous sol–gel synthesis. This route has been shown to lead to highly crystalline, uniform nanostructures, which explains the high and growing interest it is receiving. The underlying mechanisms are, however, so far only rudimentarily understood on a molecular scale. Here, we applied in situ FTIR spectroscopy and other techniques to monitor the nonaqueous synthesis of titania nanoparticles that can be easily stabilised in polar solvents and thus, possess high potential for application. A special focus is put on the kinetics of the organic condensation mechanisms enabling the reaction of the precursor to the inorganic nanoparticles. By comparing these kinetics to the process of nanoparticle formation monitored via complementary methods such as TEM and dynamic light scattering, a detailed insight into the principles and mechanisms of nanoparticle formation via the nonaqueous sol–gel synthesis is achieved.

Graphical abstract: In situ investigation of molecular kinetics and particle formation of water-dispersible titania nanocrystals

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Publication details

The article was received on 08 Dec 2008, accepted on 11 Mar 2009 and first published on 02 Apr 2009


Article type: Paper
DOI: 10.1039/B821973G
Phys. Chem. Chem. Phys., 2009,11, 3767-3774

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    In situ investigation of molecular kinetics and particle formation of water-dispersible titania nanocrystals

    G. Garnweitner and C. Grote, Phys. Chem. Chem. Phys., 2009, 11, 3767
    DOI: 10.1039/B821973G

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