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Scientists Create Highly Efficient Thermoelectric Material

Scientists at Northwestern University in Evanston, Illinois say they have found a better way to turn waste heat into electricity by improving "thermoelectric" devices. Until now, thermoelectrics were too inefficient or expensive for widespread use. According to a report in the latest issue of the journal Nature, a material called tin selenide has an unusual combination of properties that make it particularly good at converting heat into electric current.  Tin selenide is...

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