Ultrahigh-quality silicon carbide single crystals
Article Abstract:
A method based on the dislocation structure of silicon carbide (SiC) grown perpendicular to the c-axis (a-faced growth) is described, which can be used for reducing the number of dislocations in SiC single crystals by two or three orders of magnitude. Results suggest that the crystal quality of RAF substrates is good and the repeated a-face (RAF) growth process can be used for generating single-crystal growth of other materials that have hexagonality in their crystal structures.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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Enough, already
Article Abstract:
The US Department of Energy is planning to increase the amount of plutonium that can be stored at the Lawrence Livermore National Laboratory in California, which is situated in a densely populated area. This has incensed antinuclear activists and they have questioned the motives and logic behind Livermore's ill-advised insistence on doubling its plutonium stock.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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Sulphide mining by the superextensible foot of symbiotic thyasirid bivalves
Article Abstract:
Research shows that the symbiotic bivalve molluscs of the Thyasiridae family extend their feet to form burrows in the sulphur sediments in an attempt to get access to reduced sulphur. Data indicate that the length and number of burrows depend on the hydrogen sulphide concentration in the sediments.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
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