Silent Microchip ‘Fan’ Has No Moving Parts

Boffins in the US have developed a microchip fan with no moving parts that operates silently and generates enough wind to cool a laptop computer. The solid-state fan, developed with support from the US National Science Foundation, is touted as the most powerful and energy efficient fan of its size. The device produces three times the flow rate of a typical small mechanical fan and is one-fourth the size

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