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Latest Brian Wardle Stories

2011-03-25 12:12:49

In recent years, many airplane manufacturers have started building their planes from advanced composite materials, which consist of high-strength fibers, such as carbon or glass, embedded in a plastic or metal matrix. Such materials are stronger and more lightweight than aluminum, but they are also more difficult to inspect for damage, because their surfaces usually don't reveal underlying problems. "With aluminum, if you hit it, there's a dent there. With a composite, oftentimes if you hit...

2009-08-11 14:37:53

Massachusetts Institute of Technology researchers say they have created carbon nanotubes without using a metal catalyst. The scientists said their finding that oxides, as well as metals, can grow carbon nanotubes changes science's understanding of nanotube growth. Carbon nanotubes -- tiny tubes of graphite -- promise to add speed to electronic circuits and strength to materials such as carbon composites that are used in airplanes and race cars. But the MIT scientists said a major problem has...

2009-08-10 12:25:00

 Carbon nanotubes "” tiny, rolled-up tubes of graphite "” promise to add speed to electronic circuits and strength to materials like carbon composites, used in airplanes and racecars. A major problem, however, is that the metals used to grow nanotubes react unfavorably with materials found in circuits and composites. But now, researchers at MIT have for the first time shown that nanotubes can grow without a metal catalyst. The researchers demonstrate that zirconium oxide, the...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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