Image (IMAGE) Nara Institute of Science and Technology Caption (a) Chemical structure of the molecular gear; (b) STM image of the transfer of rotational motion from one gear to its neighbor. Credit Gw�na�l Rapenne, NAIST and UPS Usage Restrictions Credit Required. 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.