Spin Filter Device (IMAGE) National Institutes of Natural Sciences Caption Unidirectional rotation of the artificial molecular motor. Blue helices represent the artificial molecular motors. The rotation cycle of the artificial molecular motor includes 4 times chirality inversion, resulting in 4 times switching of the spin-polarization direction of currents. Credit NINS/IMS 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.