Thermoelectric Conversion (IMAGE) Hokkaido University Caption The barium-cobalt oxide film (top right, approximately 1 cm2) being exposed to an open flame to generate voltage. (Photo: Hiromichi Ohta) Credit Hiromichi Ohta Usage Restrictions This image is copyrighted but may be used to report this press release is credited as instructed. 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.