Negative Poisson's ratios as a common feature of cubic metals
Article Abstract:
A negative Poisson's ratio is observed for 69% of the cubic elemental metals when stretched along the [110] direction. For these metals, there are correlations between the work function and the extremal values of Poisson's ratio for the stretch direction. This can be explained using a simple electron-gas model. There is practical significance associated with the existence of negative Poisson's ratios for the cubic metals, particularly as a negative Poisson's ratio reverses the compensation effects of positive Poisson's ratios on the volume and area changes created by a uniaxial stress.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Probing carrier dynamics in nanostructures by picosecond cathodoluminescence
Article Abstract:
An original time-resolved cathodoluminescence set-up is used to describe carrier dynamics within single gallium-arsenide-based pyramidal nanostructures with a time resolution of 10 picoseconds and a spatial resolution of 50 nanometres. The behaviour of such charge carriers could be useful for evaluating elementary components in quantum computers, optical quantum gates or single photon sources for quantum cryptography.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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Super-tough carbon-nanotube fibres
Article Abstract:
The authors discuss the study on carbon-nanotube fibers. They report that these fibers are extraordinary composites which can be woven into electronic textiles.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
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