News tagged with power density

Nanogenerator's output triples previous record

(—Taking an important step forward for self-powered systems, researchers have built a nanogenerator with an ultrahigh output voltage of 209 V, which is 3.6 times higher than the previous record of 58 V. The nanogenerator, ...

dateJan 03, 2013 in Nanophysics feature
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Tiny heat engine may be world's smallest

( -- Steam engines, combustion engines, and diesel engines are all different types of heat engines, which operate by converting heat energy into mechanical work. Although heat engines have existed for a long time, ...

dateFeb 02, 2011 in General Physics feature
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Laser diodes versus LEDs

Solid-state lighting based on light-emitting diodes (LEDs) is the most efficient source of high color quality white light. Nevertheless, they show significant performance limitations such as the "efficiency droop". Blue laser ...

dateNov 11, 2013 in Optics & Photonics
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