GOLD 1 (IMAGE) Rice University Caption Using a novel optical detection system that heats nanoscale gold wires with a single laser, researchers at Rice University showed electricity generated by temperature differences is not affected measurably by grain boundaries, while strain and other defects in the material change the thermoelectric response. Credit Natelson Research Group/Rice University Usage Restrictions None 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.