Bibliographic Details
| Title: |
The growth of ultrathin films of vanadium oxide on TiO2(1 1 0) |
| Authors: |
Agnoli, S.1, Sambi, M.1, Granozzi, G.1 gaetano.granozzi@unipd.it, Castellarin-Cudia, C.2, Surnev, S.2, Ramsey, M.G.2, Netzer, F.P.2 |
| Source: |
Surface Science. Aug2004, Vol. 562 Issue 1-3, p150-156. 7p. |
| Subjects: |
Vanadium oxide, Titanium group, Quantum tunneling, Morphology |
| Abstract: |
The growth morphology of ultrathin (up to 5 ML) vanadium oxide films on TiO2(1 1 0) has been investigated by scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). It has been found that the reactive evaporation technique produces more uniform and better-ordered vanadia layers than the post-oxidation method. At low coverages V-oxide clusters adsorb on top of the fivefold-coordinated Ti rows of the substrate. With increasing coverage the clusters agglomerate and form strands, which are oriented along the [0 0 1] titania direction. For oxide coverage >2 ML the strands cover uniformly the titania substrate, forming a texture along the [0 0 1] direction, and give rise to a (1 × 1) LEED pattern. The latter is consistent with the growth of an epitaxial rutile-type VO2 phase. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
