Self-organized growth of alloy superlattices
Article Abstract:
Semiconductor devices are usually grown on a vicinal surface, where atoms are deposited to diffuse as 'adatoms'. Detachment of attachment of the adatoms leads to step motion. Liu and colleagues have recently shown that crystal growth results in periodic patterns of step bunches on the surface of the crystal. Alloy growth was considered, where the elements differed in size and surface mobility. Step bunches have an affect on the surface elastic field, and smaller adatoms are preferentially incorporated at steps with relatively compressive strain. Steps with the lowest absolute strain are favoured overall.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Less is more
Article Abstract:
Developments in nanoscale technology may have far reaching consequences for industry and medicine. Researchers at Harvard have created a nanopore, a hole measuring a few nanometres in diameter, that can detect single molecules of DNA in solution.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
Ion beam sculpting at nanometre length scales
Article Abstract:
Research describing the fabrication of a molecular scale hole or nanopore by ion beam sculpting is presented. The nanopore is shown to to be capable of registering a single DNA molecule.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: The pulling power of galaxy clusters. The state of the Universe. Characterizing the nonlinear growth of large-scale structure in the Universe
- Abstracts: A three-dimensional photonic crystal operating at infrared wavelengths. Three-dimensional control of light in a two-dimensional photonic crystal slab
- Abstracts: Sexual selection resulting from extrapair paternity in collared flycatchers. Phenotypic plasticity in the expression of sexually selected traits: neglected components of variation
- Abstracts: Non-territorial 'floaters' in great horned owls: space use during a cyclic peak of snowshoe hares. Spatial consequences of relatedness and age in buzzards
- Abstracts: Transgenerational induction of defences in animals and plants. The impact of ultraviolet radiation on the vertical distribution of zooplankton of the genus Daphnia