Obtained Unusual Nanostructures (IMAGE) Ehime University Caption Microscopic observations of obtained nanowires. Characteristic hexagonal star structure, defect-defined quantum structures induced by the existence of Bi element were observed. Credit Ehime University Usage Restrictions Please get copyright permission 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.