TECH - Thermogenerator from the printer

Wireless sensor networks monitor machinery and equipment in factories, cars and power stations. They increasingly "harvest" the energy they need to transmit measurement data from the environment, thus making them self-sufficient. At the Electronica 2012 trade fair, Fraunhofer researchers will present a printed thermogenerator, which in the future will be able to generate energy supply for sensors through temperature differences.

http://phys.org/news272199854.html