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.
Bibliographical noteFunding Information:
We acknowledge financial support by Korea Research Foundation (KRF-2001-015-DP0164), by Ministry of Commerce, Industry and Energy of Korea (Nano standard program), and by Ministry of Science and Technology of Korea through National Creative Research Initiatives and National R&D Project for Nano Science and Technology.
- Scanning tunneling microscope
- Structural properties
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry