Prediction of TiO2 nanoparticle phase and shape transitions controlled by surface chemistry.
basic_science · Level V
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Abstract
The effects of surface chemistry on the morphology and phase stability of titanium dioxide nanoparticles have been investigated using a thermodynamic model based on surface free energies and surface tensions obtained from first principles calculations. It has been found that surfaces representing acidic and alkaline conditions have a significant influence on both the shape of the nanocrystals and the anatase-to-rutile transition size. The latter introduces the possibility of inducing phase transitions by changing the surface chemistry.
Medical subject headings
- Crystallization
- Models, Chemical
- Models, Molecular
- Nanotechnology
- Nanotubes
- Titanium