(IMAGE) Fraunhofer-Gesellschaft Caption The individual components of thermoelectric modules are only a few millimeters in size. They are cut from specific alloys -- such as half-Heusler compounds. Credit Fraunhofer IPM Usage Restrictions Link: Download Picture The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.