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Issue 20, 2012
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Monodisperse titania microspheres via controlled nanoparticle aggregation

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Abstract

This paper describes the fabrication of highly monodisperse TiO2 nanoparticle aggregates (NPAs) by controlled aggregation of nanoparticles in a water-in-oil emulsion. Equally sized drops containing a titanium dioxide nanoparticle suspension are produced in a T-channel device. This procedure has a high tuning potential. Increasing the velocity of the titania suspension phase leads to an enlargement of the droplets, while raising the velocity of the oil phase reduces the drop diameter. The technique enables the preparation of monodisperse (<2%) drops between 150 and 400 μm in diameter. Evaporation of the suspension medium leads to nanoparticle aggregates. There is no significant change in dispersity from emulsion drops to NPAs, if the drying is carried out slowly.

Graphical abstract: Monodisperse titania microspheres via controlled nanoparticle aggregation

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Publication details

The article was received on 01 Mar 2012, accepted on 26 Mar 2012 and first published on 18 Apr 2012


Article type: Paper
DOI: 10.1039/C2CP40658F
Citation: Phys. Chem. Chem. Phys., 2012,14, 7490-7496
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    Monodisperse titania microspheres via controlled nanoparticle aggregation

    D. Schunk, S. Hardt, H. Wiggers and F. Marlow, Phys. Chem. Chem. Phys., 2012, 14, 7490
    DOI: 10.1039/C2CP40658F

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