Real-time observation of impurity diffusion in silicon nanowires.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 21786784.
- Also identified by DOI 10.1021/nl201879u.
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Abstract
Solid-state diffusion of the transition metal impurities, gold (Au), nickel (Ni), and copper (Cu), in silicon (Si) nanowires was studied by in situ transmission electron microscopy. Compared to diffusion in a bulk crystal, Au diffusion is extremely slow when the amount of metal is limited but significantly enhanced when an unlimited supply is available. Cu and Ni diffusion leads to rapid silicide formation but slows considerably with physical encapsulation by a volume-restricting carbon shell.
Medical subject headings
- Metal Nanoparticles
- Nanotechnology
- Nanowires
- Silicon