Hot nanoparticles produce giant and explosive bubbles

When gold nano particles in water are illuminated by a laser, they get very hot: well above the boiling point of water. The formation of vapour bubbles caused by this, is well-known. New experiments, however, using a very ...

Low pressure reduces bubble trouble

Spray coating and inkjet-based electronics manufacture are among the industrial applications in which liquid droplets are applied to a surface. But minuscule air bubbles that get trapped beneath the droplet as it lands can ...

First 3-D imaging of excited quantum dots

Quantum dots are rapidly taking center stage in emerging applications and research developments, from enhanced LCD TVs and thin-film solar cells, to high-speed data transfer and fluorescent labeling in biomedical applications.

When birds collide with high-speed rail

If a high-speed train runs at 185 mph through small urbanized areas, it is possible that some animals will be surprised in their path, including magpies, pigeons, crows and buzzards. These collisions have not been scientifically ...

Plankton swim against the current

Zooplankton are often considered to be a passive source of food for fish and other aquatic animals. But at least one of their representatives, the millimetre-sized copepod (Eurytemora affinis), moves purposefully in turbulent ...

California bullet train staff recommend German operator

The agency overseeing California's bullet train project recommended Friday that a U.S. subsidiary of a German rail company design and operate a train segment from the Central Valley to Silicon Valley in its early stages.

Safety assistance system warns of dirty bombs

The threat of terrorism in Europe has been on the rise in recent years, with experts and politicians particularly worried that terrorists might make use of dirty bombs. Fraunhofer researchers have developed a new system that ...

New machine evaluates soybean at harvest for quality

When a field of soybeans is ready to harvest, speed is of the essence. But harvesting grinds to a halt every time the combine operator has to climb down out of the cab to manually check for quality—whole, un-split beans ...

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