Publications by authors named "James P McVittie"
Article Synopsis
- - Germanium-tin alloy nanowires show promise for creating efficient light-emitting devices that work well with silicon technology by achieving a direct band gap transition.
- - Free-standing nanowires can avoid elastic strains that usually hinder direct gap formation in traditional thin film structures, allowing for better light-emission characteristics.
- - The researchers successfully created core-shell nanowires, consisting of strained Ge core and unstrained GeSn shells, using low-temperature chemical vapor deposition, achieving high levels of Sn incorporation beyond typical limits.
Ultra-high-yield growth of vertical single-walled carbon nanotubes: Hidden roles of hydrogen and oxygen.
Proc Natl Acad Sci U S A
November 2005
An oxygen-assisted hydrocarbon chemical vapor deposition method is developed to afford large-scale, highly reproducible, ultra-high-yield growth of vertical single-walled carbon nanotubes (V-SWNTs). It is revealed that reactive hydrogen species, inevitable in hydrocarbon-based growth, are damaging to the formation of sp(2)-like SWNTs in a diameter-dependent manner. The addition of oxygen scavenges H species and provides a powerful control over the C/H ratio to favor SWNT growth.
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