Journal article

Publication year: 2008

Pages: 422-431

Journal: Advanced Functional Materials

Volume number: 18

Issue number: 3

ISSN: 1616-301X

eISSN: 1616-3028

DOI Link: https://doi.org/10.1002/adfm.200601189

Publisher: Wiley

Abstract: 
Under strongly reducing conditions at high temperatures titania develops a specific surface morphology, comprising a regular array of fibers with a diameter in the sub-micrometer range. By a chemical diffusion experiment in a defined oxygen potential gradient it is shown that this surface structuring is caused by a diffusion-driven morphological instability of an advancing reaction front (surface). The kinetics of the process is analyzed in terms of linear transport equations. The conditions for the occurrence of the surface instability are discussed and the required materials properties are analyzed. The observed surface structuring is not restricted to titania, rather it has to occur in all nonstoichiometric compounds with predominant cation mobility.

Harvard Citation style: Lee, D. and Janek, J. (2008) Nanocarving of Titania as a diffusion-driven morphological instability, Advanced Functional Materials, 18(3), pp. 422-431. https://doi.org/10.1002/adfm.200601189

APA Citation style: Lee, D., & Janek, J. (2008). Nanocarving of Titania as a diffusion-driven morphological instability. Advanced Functional Materials. 18(3), 422-431. https://doi.org/10.1002/adfm.200601189