Lithium Ion Travel Twin Boundaries (IMAGE) Michigan Technological University Caption Spotting twin boundary defects in tin oxides requires the aid of a transmission electron microscope: The yellow streaks, highlighted by green arrows, show where lithium ions travel along twin boundaries. Credit Reza Shahbazian-Yassar Usage Restrictions Credit: Michigan Tech, Reza Shahbazian-Yassar 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.