News tagged with impurities

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Hybrid solar system makes rooftop hydrogen

While roofs across the world sport photovoltaic solar panels to convert sunlight into electricity, a Duke University engineer believes a novel hybrid system can wring even more useful energy out of the sun's ...

Aug 09, 2011
4.8 / 5 (17) 8 | with audio podcast

The ferromagnetic Kondo effect

A group of physicists that includes scientists of the International School for Advanced Studies (SISSA) of Trieste have shown how to obtain a particular case of a physical effect – so far never observed ...

Jul 24, 2013
5 / 5 (12) 3 | with audio podcast

Disorder is key to nanotube mystery

Scientists often find strange and unexpected things when they look at materials at the nanoscale -- the level of single atoms and molecules. This holds true even for the most common materials, such as water.

Aug 12, 2011
4.9 / 5 (9) 3 | with audio podcast

Extrusion for greener aluminum production

Aluminum recycling has become a successful business since its inception a century ago. Nearly a third of the aluminum produced in the United States is made from aluminum scraps that have been recycled in ...

Jul 26, 2013
4.4 / 5 (8) 0 | with audio podcast