Mobile phones to be powered by micro-jet engines

November 23, 2004 Engineers at the Georgia Institute of Technology in the US have made advances in batch producing miniaturised, jet engine-based generators from a single stack of bonded silicon wafers - potentially unlocking a new power source for mobile phones and other portable electronic devices. New Scientist magazine has reported that by spinning a tiny magnet above a mesh of interleaved coils etched into a wafer, engineers David Arnold and Mark Allen have built the first silicon-compatible device capable of converting mechanical energy (produced by a rotating micro-turbine) into usable amounts of electrical energy.

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