Unraveling the Diffusion of Bulk Ti Interstitials in Rutile TiO2(110) by Monitoring Their Reaction with O Adatoms
| Autor: | Estephania Lira, Ralf Bechstein, John T. Yates, Flemming Besenbacher, Zhen Zhang, Stefan Wendt, Jonas Ø. Hansen, Junseok Lee |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Surface diffusion
Chemistry Diffusion Analytical chemistry Activation energy Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention General Energy Reaction rate constant law Rutile Yield (chemistry) Desorption Physical and Theoretical Chemistry Scanning tunneling microscope |
| Zdroj: | Zhang, Z, Lee, J, Yates, Jr., J T, Bechstein, R, Salazar, E L, Hansen, J Ø, Wendt, S & Besenbacher, F 2010, ' Unraveling the diffusion of bulk Ti interstitials in rutile TiO2(110) by monitoring their reaction with O adatoms ', Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, vol. 114, pp. 3059-3062 . https://doi.org/10.1021/jp910358w |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp910358w |
| Popis: | The diffusion of interstitial Ti3+ species (Tii3+) in rutile TiO2(110) from the bulk to the surface has been studied utilizing two experimental techniques. Electron-stimulated desorption of O+ ions was employed to kinetically monitor the reaction between oxygen adatoms with Tii3+ species at temperatures between 360 and 400 K. Scanning tunneling microscopy was also used to measure the Tii3+ diffusion rate. Both methods yield a rate constant kTii3+ = 5 × 10−4 s−1 at 393 K. The activation energy as measured by the rate dependence on temperature is ∼1.0 eV. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|