Self-assembly of metal nanostructures on binary alloy surfaces.
basic_science · Level V
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- Record sourced from PubMed, PMID 21097706.
- Also identified by DOI 10.1073/pnas.1008157107 and PMC identifier 3024679.
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Abstract
Deposition of metals on binary alloy surfaces offers new possibilities for guiding the formation of functional metal nanostructures. This idea is explored with scanning tunneling microscopy studies and atomistic-level analysis and modeling of nonequilibrium island formation. For Au/NiAl(110), complex monolayer structures are found and compared with the simple fcc(110) bilayer structure recently observed for Ag/NiAl(110). We also consider a more complex codeposition system, (Ni + Al)/NiAl(110), which offers the opportunity for fundamental studies of self-growth of alloys including deviations for equilibrium ordering. A general multisite lattice-gas model framework enables analysis of structure selection and morphological evolution in these systems.
Medical subject headings
- Alloys
- Aluminum
- Chemistry, Physical
- Gold
- Models, Chemical
- Nanostructures
- Nickel
- Silver