Format

Send to

Choose Destination
Nano Lett. 2005 Jul;5(7):1261-6.

Prediction of TiO2 nanoparticle phase and shape transitions controlled by surface chemistry.

Author information

1
Center for Nanoscale Materials, Materials Science Division, Argonne National Laboratory, 9700 South Cass Ave, Argonne, Illinois 60439, USA. amanda.barnard@anl.gov

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.

PMID:
16178221
[Indexed for MEDLINE]

Supplemental Content

Loading ...
Support Center