TEM study of TiO2 nanocrystals with different particle size and shape

TiO2 anatase nanocrystals deposited on carbon films from colloidal solutions were characterised using TEM. The TiO2 nanocrystals exhibit different sizes, shapes, and facets, depending on the pH value and the type of organic additives in the colloidal solutions. Typically, a high pH value results in...

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Bibliographic Details
Published in:Materials letters 2000-06, Vol.44 (3-4), p.228-232
Main Authors: GAO, Y, ELDER, S. A
Format: Article
Language:English
Subjects:
Clusters, nanoparticles, and nanocrystalline materials
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
Physics
Structure of solids and liquids
crystallography
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Summary:TiO2 anatase nanocrystals deposited on carbon films from colloidal solutions were characterised using TEM. The TiO2 nanocrystals exhibit different sizes, shapes, and facets, depending on the pH value and the type of organic additives in the colloidal solutions. Typically, a high pH value results in small cubic-like nanocrystals with {112} and {103} faces, while a low pH value leads to truncated tetragonal nanocrystals with {101}, {001} and {010} faces. Excess dilution of the particle density appears to cause partial dissolution of the cubic-like nanocrystals to form spherical nanocrystals. 10 refs.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(00)00033-1