Transistor Cross Section (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Transmission electron microscope image of a cross section of the transistor. It shows the ~ 1 nanometer carbon nanotube gate and the molybdenum disulfide semiconductor separated by zirconium dioxide which is an insulator. Credit Qingxiao Wang, UT Dallas Usage Restrictions All rights reserved. Commercial use prohibited. 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.