An array on nano energy harvesters in what the researchers call a “swiss cheese” arrangement.
(Credit: Image courtesy of University of Rochester

A Quantum Dot Energy Harvester

Feb. 14, 2013 — A new type of nanoscale engine has been proposed that would use quantum dots to generate electricity from waste heat, potentially making microcircuits more efficient.

“The system is really a simple one, which exploits certain properties of quantum dots to harvest heat,” Professor Andrew Jordan of the University of Rochester said. “Despite this simplicity, the power it could generate is still larger than any other nanoengine that has been considered until now.”

The engines would be microscopic in size, and have no moving parts. Each would only produce a tiny amount of power — a millionth or less of what a light bulb uses. But by combining millions of the engines in a layered structure, Jordan says a device that was a square inch in area could produce about a watt of power for every one degree difference in temperature. Enough of them could make a notable difference in the energy consumption of a computer.

Read more:A quantum dot energy harvester — Science Daily.

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