Picture 1 -- Different Types of Nanotubes (IMAGE) National University of Science and Technology MISIS Caption Picture 1 -- different types of nanotubes: 1) zigzag, 2) chiral and 3) armchair (or dentated). Credit © NUST MISIS Usage Restrictions None 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.