Device with 3D Geometry (image) University of Groningen Share Print E-Mail Caption Scanning electron microscope image of a non-local spin-valve with a curved nano-channel as used in this study. Transport of pure spin current has been achieved and can be controlled by changing the 3D geometry of the nano-channel. Credit Das et al, Nano Letters Usage Restrictions With Credit Share Print E-Mail 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.