Anisotropic growth of Cr Ad-layer: a one-dimensional nanostructure

The growth behavior of Cr ad-layer on W(110) surface was studied with scanning tunneling microscopy. Two-dimensional islands are formed at Cr coverage of ∼0.3 monolayer, suggesting typical homogeneous nucleation. The growth mode undergoes a transition to the formation of organized nano-scale lines a...

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Bibliographic Details
Published in:Thin solid films 2003-09, Vol.441 (1), p.317-320
Main Authors: Kim, E.-P., Kim, T.-H., Kim, S.-T., Kuk, Y., Kahng, S.-J.
Format: Article
Language:English
Subjects:
Epitaxy
Nanostructures
Scanning tunneling microscope
Structural properties
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Summary:The growth behavior of Cr ad-layer on W(110) surface was studied with scanning tunneling microscopy. Two-dimensional islands are formed at Cr coverage of ∼0.3 monolayer, suggesting typical homogeneous nucleation. The growth mode undergoes a transition to the formation of organized nano-scale lines at the coverage of >0.5 monolayer. The grown lines are aligned along [1̄11] and [11̄1] directions at room temperature. At an elevated temperature, trenches are formed in a two-dimensional wetting layer with high aspect ratios. Possible microscopic origins for the observed structures are discussed.
ISSN:0040-6090
1879-2731
DOI:10.1016/S0040-6090(03)00944-1