The High Voltage Electron Microscope (IMAGE) Hokkaido University Caption The high voltage electron microscope at Hokkaido University was used in the study. Credit Hokkaido University Usage Restrictions This image is copyrighted by Hokkaido University and can be used for reporting scientific works described in this press release without asking for permission as long as it's properly credited. 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.