Image graphics (IMAGE) University of Tsukuba Caption Image of a nested structure of carbon nanotubes enveloped in boron nitride nanotubes under photoexcitation Credit University of Tsukuba Usage Restrictions Unauthorized use is prohibited License Original 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.